From 1d3bb996481e116f5f2b127cbd29b83365d2cf62 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 23 Aug 2007 13:56:01 +1000 Subject: 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 Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/debug.c | 238 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 drivers/net/ibm_newemac/debug.c (limited to 'drivers/net/ibm_newemac/debug.c') diff --git a/drivers/net/ibm_newemac/debug.c b/drivers/net/ibm_newemac/debug.c new file mode 100644 index 00000000000..170524ee0f1 --- /dev/null +++ b/drivers/net/ibm_newemac/debug.c @@ -0,0 +1,238 @@ +/* + * drivers/net/ibm_newemac/debug.c + * + * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines. + * + * Copyright (c) 2004, 2005 Zultys Technologies + * Eugene Surovegin or + * + * 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. + * + */ +#include +#include +#include +#include +#include +#include + +#include "core.h" + +static spinlock_t emac_dbg_lock = SPIN_LOCK_UNLOCKED; + +static void emac_desc_dump(struct emac_instance *p) +{ + int i; + printk("** EMAC %s TX BDs **\n" + " tx_cnt = %d tx_slot = %d ack_slot = %d\n", + p->ofdev->node->full_name, + p->tx_cnt, p->tx_slot, p->ack_slot); + for (i = 0; i < NUM_TX_BUFF / 2; ++i) + printk + ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n", + i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ', + p->tx_desc[i].ctrl, p->tx_desc[i].data_len, + NUM_TX_BUFF / 2 + i, + p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr, + p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ', + p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl, + p->tx_desc[NUM_TX_BUFF / 2 + i].data_len); + + printk("** EMAC %s RX BDs **\n" + " rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n" + " rx_sg_skb = 0x%p\n", + p->ofdev->node->full_name, + p->rx_slot, p->commac.flags, p->rx_skb_size, + p->rx_sync_size, p->rx_sg_skb); + for (i = 0; i < NUM_RX_BUFF / 2; ++i) + printk + ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n", + i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ', + p->rx_desc[i].ctrl, p->rx_desc[i].data_len, + NUM_RX_BUFF / 2 + i, + p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr, + p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ', + p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl, + p->rx_desc[NUM_RX_BUFF / 2 + i].data_len); +} + +static void emac_mac_dump(struct emac_instance *dev) +{ + struct emac_regs __iomem *p = dev->emacp; + + printk("** EMAC %s registers **\n" + "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n" + "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n" + "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n" + "IAHT: 0x%04x 0x%04x 0x%04x 0x%04x " + "GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n" + "LSA = %04x%08x IPGVR = 0x%04x\n" + "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n" + "OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\n", + dev->ofdev->node->full_name, in_be32(&p->mr0), in_be32(&p->mr1), + in_be32(&p->tmr0), in_be32(&p->tmr1), + in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser), + in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid), + in_be32(&p->vtci), + in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3), + in_be32(&p->iaht4), + in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3), + in_be32(&p->gaht4), + in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr), + in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr), + in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr) + ); + + emac_desc_dump(dev); +} + +static void emac_mal_dump(struct mal_instance *mal) +{ + int i; + + printk("** MAL %s Registers **\n" + "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n" + "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n" + "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n", + mal->ofdev->node->full_name, + get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR), + get_mal_dcrn(mal, MAL_IER), + get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR), + get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR), + get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR), + get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR) + ); + + printk("TX|"); + for (i = 0; i < mal->num_tx_chans; ++i) { + if (i && !(i % 4)) + printk("\n "); + printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i))); + } + printk("\nRX|"); + for (i = 0; i < mal->num_rx_chans; ++i) { + if (i && !(i % 4)) + printk("\n "); + printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i))); + } + printk("\n "); + for (i = 0; i < mal->num_rx_chans; ++i) { + u32 r = get_mal_dcrn(mal, MAL_RCBS(i)); + if (i && !(i % 3)) + printk("\n "); + printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16); + } + printk("\n"); +} + +static struct emac_instance *__emacs[4]; +static struct mal_instance *__mals[1]; + +void emac_dbg_register(struct emac_instance *dev) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&emac_dbg_lock, flags); + for (i = 0; i < ARRAY_SIZE(__emacs); i++) + if (__emacs[i] == NULL) { + __emacs[i] = dev; + break; + } + spin_unlock_irqrestore(&emac_dbg_lock, flags); +} + +void emac_dbg_unregister(struct emac_instance *dev) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&emac_dbg_lock, flags); + for (i = 0; i < ARRAY_SIZE(__emacs); i++) + if (__emacs[i] == dev) { + __emacs[i] = NULL; + break; + } + spin_unlock_irqrestore(&emac_dbg_lock, flags); +} + +void mal_dbg_register(struct mal_instance *mal) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&emac_dbg_lock, flags); + for (i = 0; i < ARRAY_SIZE(__mals); i++) + if (__mals[i] == NULL) { + __mals[i] = mal; + break; + } + spin_unlock_irqrestore(&emac_dbg_lock, flags); +} + +void mal_dbg_unregister(struct mal_instance *mal) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&emac_dbg_lock, flags); + for (i = 0; i < ARRAY_SIZE(__mals); i++) + if (__mals[i] == mal) { + __mals[i] = NULL; + break; + } + spin_unlock_irqrestore(&emac_dbg_lock, flags); +} + +void emac_dbg_dump_all(void) +{ + unsigned int i; + unsigned long flags; + + spin_lock_irqsave(&emac_dbg_lock, flags); + + for (i = 0; i < ARRAY_SIZE(__mals); ++i) + if (__mals[i]) + emac_mal_dump(__mals[i]); + + for (i = 0; i < ARRAY_SIZE(__emacs); ++i) + if (__emacs[i]) + emac_mac_dump(__emacs[i]); + + spin_unlock_irqrestore(&emac_dbg_lock, flags); +} + +#if defined(CONFIG_MAGIC_SYSRQ) +static void emac_sysrq_handler(int key, struct tty_struct *tty) +{ + emac_dbg_dump_all(); +} + +static struct sysrq_key_op emac_sysrq_op = { + .handler = emac_sysrq_handler, + .help_msg = "emaC", + .action_msg = "Show EMAC(s) status", +}; + +int __init emac_init_debug(void) +{ + return register_sysrq_key('c', &emac_sysrq_op); +} + +void __exit emac_fini_debug(void) +{ + unregister_sysrq_key('c', &emac_sysrq_op); +} + +#else +int __init emac_init_debug(void) +{ + return 0; +} +void __exit emac_fini_debug(void) +{ +} +#endif /* CONFIG_MAGIC_SYSRQ */ -- cgit v1.2.3-70-g09d2