Device tree aware EMAC driver
Based on BenH's earlier work, this is a new version of the EMAC driver
for the built-in ethernet found on PowerPC 4xx embedded CPUs. The
same ASIC is also found in the Axon bridge chip. This new version is
designed to work in the arch/powerpc tree, using the device tree to
probe the device, rather than the old and ugly arch/ppc OCP layer.
This driver is designed to sit alongside the old driver (that lies in
drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The
old driver is left in place to support arch/ppc until arch/ppc itself
reaches its final demise (not too long now, with luck).
This driver still has a number of things that could do with cleaning
up, but I think they can be fixed up after merging. Specifically:
- Should be adjusted to properly use the dma mapping API.
Axon needs this.
- Probe logic needs reworking, in conjuction with the general
probing code for of_platform devices. The dependencies here between
EMAC, MAL, ZMII etc. make this complicated. At present, it usually
works, because we initialize and register the sub-drivers before the
EMAC driver itself, and (being in driver code) runs after the devices
themselves have been instantiated from the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-23 11:56:01 +08:00
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/*
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* drivers/net/ibm_newemac/debug.c
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*
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* Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
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*
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2007-12-05 08:14:33 +08:00
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* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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*
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* Based on the arch/ppc version of the driver:
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*
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Device tree aware EMAC driver
Based on BenH's earlier work, this is a new version of the EMAC driver
for the built-in ethernet found on PowerPC 4xx embedded CPUs. The
same ASIC is also found in the Axon bridge chip. This new version is
designed to work in the arch/powerpc tree, using the device tree to
probe the device, rather than the old and ugly arch/ppc OCP layer.
This driver is designed to sit alongside the old driver (that lies in
drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The
old driver is left in place to support arch/ppc until arch/ppc itself
reaches its final demise (not too long now, with luck).
This driver still has a number of things that could do with cleaning
up, but I think they can be fixed up after merging. Specifically:
- Should be adjusted to properly use the dma mapping API.
Axon needs this.
- Probe logic needs reworking, in conjuction with the general
probing code for of_platform devices. The dependencies here between
EMAC, MAL, ZMII etc. make this complicated. At present, it usually
works, because we initialize and register the sub-drivers before the
EMAC driver itself, and (being in driver code) runs after the devices
themselves have been instantiated from the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-23 11:56:01 +08:00
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* Copyright (c) 2004, 2005 Zultys Technologies
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/sysrq.h>
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#include <asm/io.h>
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#include "core.h"
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static spinlock_t emac_dbg_lock = SPIN_LOCK_UNLOCKED;
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static void emac_desc_dump(struct emac_instance *p)
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{
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int i;
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printk("** EMAC %s TX BDs **\n"
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" tx_cnt = %d tx_slot = %d ack_slot = %d\n",
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p->ofdev->node->full_name,
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p->tx_cnt, p->tx_slot, p->ack_slot);
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for (i = 0; i < NUM_TX_BUFF / 2; ++i)
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printk
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("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
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i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
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p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
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NUM_TX_BUFF / 2 + i,
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p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
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p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
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p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
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p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
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printk("** EMAC %s RX BDs **\n"
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" rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n"
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" rx_sg_skb = 0x%p\n",
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p->ofdev->node->full_name,
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p->rx_slot, p->commac.flags, p->rx_skb_size,
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p->rx_sync_size, p->rx_sg_skb);
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for (i = 0; i < NUM_RX_BUFF / 2; ++i)
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printk
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("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
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i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
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p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
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NUM_RX_BUFF / 2 + i,
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p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
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p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
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p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
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p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
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}
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static void emac_mac_dump(struct emac_instance *dev)
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{
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struct emac_regs __iomem *p = dev->emacp;
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printk("** EMAC %s registers **\n"
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"MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
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"RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
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"IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n"
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"IAHT: 0x%04x 0x%04x 0x%04x 0x%04x "
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"GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n"
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"LSA = %04x%08x IPGVR = 0x%04x\n"
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"STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
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"OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\n",
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dev->ofdev->node->full_name, in_be32(&p->mr0), in_be32(&p->mr1),
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in_be32(&p->tmr0), in_be32(&p->tmr1),
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in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
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in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
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in_be32(&p->vtci),
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in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3),
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in_be32(&p->iaht4),
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in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3),
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in_be32(&p->gaht4),
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in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
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in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
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in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr)
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);
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emac_desc_dump(dev);
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}
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static void emac_mal_dump(struct mal_instance *mal)
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{
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int i;
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printk("** MAL %s Registers **\n"
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"CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
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"TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
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"RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
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mal->ofdev->node->full_name,
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get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
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get_mal_dcrn(mal, MAL_IER),
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get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
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get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
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get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
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get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
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);
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printk("TX|");
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for (i = 0; i < mal->num_tx_chans; ++i) {
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if (i && !(i % 4))
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printk("\n ");
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printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
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}
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printk("\nRX|");
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for (i = 0; i < mal->num_rx_chans; ++i) {
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if (i && !(i % 4))
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printk("\n ");
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printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
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}
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printk("\n ");
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for (i = 0; i < mal->num_rx_chans; ++i) {
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u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
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if (i && !(i % 3))
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printk("\n ");
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printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
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}
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printk("\n");
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}
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static struct emac_instance *__emacs[4];
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static struct mal_instance *__mals[1];
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void emac_dbg_register(struct emac_instance *dev)
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{
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unsigned long flags;
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int i;
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spin_lock_irqsave(&emac_dbg_lock, flags);
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for (i = 0; i < ARRAY_SIZE(__emacs); i++)
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if (__emacs[i] == NULL) {
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__emacs[i] = dev;
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break;
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}
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spin_unlock_irqrestore(&emac_dbg_lock, flags);
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}
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void emac_dbg_unregister(struct emac_instance *dev)
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{
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unsigned long flags;
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int i;
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spin_lock_irqsave(&emac_dbg_lock, flags);
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for (i = 0; i < ARRAY_SIZE(__emacs); i++)
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if (__emacs[i] == dev) {
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__emacs[i] = NULL;
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break;
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}
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spin_unlock_irqrestore(&emac_dbg_lock, flags);
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}
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void mal_dbg_register(struct mal_instance *mal)
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{
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unsigned long flags;
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int i;
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spin_lock_irqsave(&emac_dbg_lock, flags);
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for (i = 0; i < ARRAY_SIZE(__mals); i++)
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if (__mals[i] == NULL) {
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__mals[i] = mal;
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break;
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}
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spin_unlock_irqrestore(&emac_dbg_lock, flags);
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}
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void mal_dbg_unregister(struct mal_instance *mal)
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{
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unsigned long flags;
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int i;
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spin_lock_irqsave(&emac_dbg_lock, flags);
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for (i = 0; i < ARRAY_SIZE(__mals); i++)
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if (__mals[i] == mal) {
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__mals[i] = NULL;
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break;
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}
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spin_unlock_irqrestore(&emac_dbg_lock, flags);
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}
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void emac_dbg_dump_all(void)
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{
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unsigned int i;
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unsigned long flags;
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spin_lock_irqsave(&emac_dbg_lock, flags);
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for (i = 0; i < ARRAY_SIZE(__mals); ++i)
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if (__mals[i])
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emac_mal_dump(__mals[i]);
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for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
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if (__emacs[i])
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emac_mac_dump(__emacs[i]);
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spin_unlock_irqrestore(&emac_dbg_lock, flags);
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}
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#if defined(CONFIG_MAGIC_SYSRQ)
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static void emac_sysrq_handler(int key, struct tty_struct *tty)
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{
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emac_dbg_dump_all();
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}
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static struct sysrq_key_op emac_sysrq_op = {
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.handler = emac_sysrq_handler,
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.help_msg = "emaC",
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.action_msg = "Show EMAC(s) status",
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};
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int __init emac_init_debug(void)
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{
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return register_sysrq_key('c', &emac_sysrq_op);
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}
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void __exit emac_fini_debug(void)
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{
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unregister_sysrq_key('c', &emac_sysrq_op);
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}
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#else
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int __init emac_init_debug(void)
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{
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return 0;
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}
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void __exit emac_fini_debug(void)
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{
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}
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#endif /* CONFIG_MAGIC_SYSRQ */
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