diff options
Diffstat (limited to 'drivers/net/ep93xx_eth.c')
| -rw-r--r-- | drivers/net/ep93xx_eth.c | 654 |
1 files changed, 0 insertions, 654 deletions
diff --git a/drivers/net/ep93xx_eth.c b/drivers/net/ep93xx_eth.c deleted file mode 100644 index 9f8df7de060..00000000000 --- a/drivers/net/ep93xx_eth.c +++ /dev/null @@ -1,654 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Cirrus Logic EP93xx ethernet MAC / MII driver. - * - * Copyright (C) 2010, 2009 - * Matthias Kaehlcke <matthias@kaehlcke.net> - * - * Copyright (C) 2004, 2005 - * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com> - * - * Based on the original eth.[ch] Cirrus Logic EP93xx Rev D. Ethernet Driver, - * which is - * - * (C) Copyright 2002 2003 - * Adam Bezanson, Network Audio Technologies, Inc. - * <bezanson@netaudiotech.com> - */ - -#include <command.h> -#include <common.h> -#include <log.h> -#include <net.h> -#include <asm/arch/ep93xx.h> -#include <asm/io.h> -#include <malloc.h> -#include <miiphy.h> -#include <linux/bug.h> -#include <linux/types.h> -#include "ep93xx_eth.h" - -#define GET_PRIV(eth_dev) ((struct ep93xx_priv *)(eth_dev)->priv) -#define GET_REGS(eth_dev) (GET_PRIV(eth_dev)->regs) - -/* ep93xx_miiphy ops forward declarations */ -static int ep93xx_miiphy_read(struct mii_dev *bus, int addr, int devad, - int reg); -static int ep93xx_miiphy_write(struct mii_dev *bus, int addr, int devad, - int reg, u16 value); - -#if defined(EP93XX_MAC_DEBUG) -/** - * Dump ep93xx_mac values to the terminal. - */ -static void dump_dev(struct eth_device *dev) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - int i; - - printf("\ndump_dev()\n"); - printf(" rx_dq.base %p\n", priv->rx_dq.base); - printf(" rx_dq.current %p\n", priv->rx_dq.current); - printf(" rx_dq.end %p\n", priv->rx_dq.end); - printf(" rx_sq.base %p\n", priv->rx_sq.base); - printf(" rx_sq.current %p\n", priv->rx_sq.current); - printf(" rx_sq.end %p\n", priv->rx_sq.end); - - for (i = 0; i < NUMRXDESC; i++) - printf(" rx_buffer[%2.d] %p\n", i, net_rx_packets[i]); - - printf(" tx_dq.base %p\n", priv->tx_dq.base); - printf(" tx_dq.current %p\n", priv->tx_dq.current); - printf(" tx_dq.end %p\n", priv->tx_dq.end); - printf(" tx_sq.base %p\n", priv->tx_sq.base); - printf(" tx_sq.current %p\n", priv->tx_sq.current); - printf(" tx_sq.end %p\n", priv->tx_sq.end); -} - -/** - * Dump all RX status queue entries to the terminal. - */ -static void dump_rx_status_queue(struct eth_device *dev) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - int i; - - printf("\ndump_rx_status_queue()\n"); - printf(" descriptor address word1 word2\n"); - for (i = 0; i < NUMRXDESC; i++) { - printf(" [ %p ] %08X %08X\n", - priv->rx_sq.base + i, - (priv->rx_sq.base + i)->word1, - (priv->rx_sq.base + i)->word2); - } -} - -/** - * Dump all RX descriptor queue entries to the terminal. - */ -static void dump_rx_descriptor_queue(struct eth_device *dev) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - int i; - - printf("\ndump_rx_descriptor_queue()\n"); - printf(" descriptor address word1 word2\n"); - for (i = 0; i < NUMRXDESC; i++) { - printf(" [ %p ] %08X %08X\n", - priv->rx_dq.base + i, - (priv->rx_dq.base + i)->word1, - (priv->rx_dq.base + i)->word2); - } -} - -/** - * Dump all TX descriptor queue entries to the terminal. - */ -static void dump_tx_descriptor_queue(struct eth_device *dev) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - int i; - - printf("\ndump_tx_descriptor_queue()\n"); - printf(" descriptor address word1 word2\n"); - for (i = 0; i < NUMTXDESC; i++) { - printf(" [ %p ] %08X %08X\n", - priv->tx_dq.base + i, - (priv->tx_dq.base + i)->word1, - (priv->tx_dq.base + i)->word2); - } -} - -/** - * Dump all TX status queue entries to the terminal. - */ -static void dump_tx_status_queue(struct eth_device *dev) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - int i; - - printf("\ndump_tx_status_queue()\n"); - printf(" descriptor address word1\n"); - for (i = 0; i < NUMTXDESC; i++) { - printf(" [ %p ] %08X\n", - priv->rx_sq.base + i, - (priv->rx_sq.base + i)->word1); - } -} -#else -#define dump_dev(x) -#define dump_rx_descriptor_queue(x) -#define dump_rx_status_queue(x) -#define dump_tx_descriptor_queue(x) -#define dump_tx_status_queue(x) -#endif /* defined(EP93XX_MAC_DEBUG) */ - -/** - * Reset the EP93xx MAC by twiddling the soft reset bit and spinning until - * it's cleared. - */ -static void ep93xx_mac_reset(struct eth_device *dev) -{ - struct mac_regs *mac = GET_REGS(dev); - uint32_t value; - - debug("+ep93xx_mac_reset"); - - value = readl(&mac->selfctl); - value |= SELFCTL_RESET; - writel(value, &mac->selfctl); - - while (readl(&mac->selfctl) & SELFCTL_RESET) - ; /* noop */ - - debug("-ep93xx_mac_reset"); -} - -/* Eth device open */ -static int ep93xx_eth_open(struct eth_device *dev, struct bd_info *bd) -{ - struct ep93xx_priv *priv = GET_PRIV(dev); - struct mac_regs *mac = GET_REGS(dev); - uchar *mac_addr = dev->enetaddr; - int i; - - debug("+ep93xx_eth_open"); - - /* Reset the MAC */ - ep93xx_mac_reset(dev); - - /* Reset the descriptor queues' current and end address values */ - priv->tx_dq.current = priv->tx_dq.base; - priv->tx_dq.end = (priv->tx_dq.base + NUMTXDESC); - - priv->tx_sq.current = priv->tx_sq.base; - priv->tx_sq.end = (priv->tx_sq.base + NUMTXDESC); - - priv->rx_dq.current = priv->rx_dq.base; - priv->rx_dq.end = (priv->rx_dq.base + NUMRXDESC); - - priv->rx_sq.current = priv->rx_sq.base; - priv->rx_sq.end = (priv->rx_sq.base + NUMRXDESC); - - /* - * Set the transmit descriptor and status queues' base address, - * current address, and length registers. Set the maximum frame - * length and threshold. Enable the transmit descriptor processor. - */ - writel((uint32_t)priv->tx_dq.base, &mac->txdq.badd); - writel((uint32_t)priv->tx_dq.base, &mac->txdq.curadd); - writel(sizeof(struct tx_descriptor) * NUMTXDESC, &mac->txdq.blen); - - writel((uint32_t)priv->tx_sq.base, &mac->txstsq.badd); - writel((uint32_t)priv->tx_sq.base, &mac->txstsq.curadd); - writel(sizeof(struct tx_status) * NUMTXDESC, &mac->txstsq.blen); - - writel(0x00040000, &mac->txdthrshld); - writel(0x00040000, &mac->txststhrshld); - - writel((TXSTARTMAX << 0) | (PKTSIZE_ALIGN << 16), &mac->maxfrmlen); - writel(BMCTL_TXEN, &mac->bmctl); - - /* - * Set the receive descriptor and status queues' base address, - * current address, and length registers. Enable the receive - * descriptor processor. - */ - writel((uint32_t)priv->rx_dq.base, &mac->rxdq.badd); - writel((uint32_t)priv->rx_dq.base, &mac->rxdq.curadd); - writel(sizeof(struct rx_descriptor) * NUMRXDESC, &mac->rxdq.blen); - - writel((uint32_t)priv->rx_sq.base, &mac->rxstsq.badd); - writel((uint32_t)priv->rx_sq.base, &mac->rxstsq.curadd); - writel(sizeof(struct rx_status) * NUMRXDESC, &mac->rxstsq.blen); - - writel(0x00040000, &mac->rxdthrshld); - - writel(BMCTL_RXEN, &mac->bmctl); - - writel(0x00040000, &mac->rxststhrshld); - - /* Wait until the receive descriptor processor is active */ - while (!(readl(&mac->bmsts) & BMSTS_RXACT)) - ; /* noop */ - - /* - * Initialize the RX descriptor queue. Clear the TX descriptor queue. - * Clear the RX and TX status queues. Enqueue the RX descriptor and - * status entries to the MAC. - */ - for (i = 0; i < NUMRXDESC; i++) { - /* set buffer address */ - (priv->rx_dq.base + i)->word1 = (uint32_t)net_rx_packets[i]; - - /* set buffer length, clear buffer index and NSOF */ - (priv->rx_dq.base + i)->word2 = PKTSIZE_ALIGN; - } - - memset(priv->tx_dq.base, 0, - (sizeof(struct tx_descriptor) * NUMTXDESC)); - memset(priv->rx_sq.base, 0, - (sizeof(struct rx_status) * NUMRXDESC)); - memset(priv->tx_sq.base, 0, - (sizeof(struct tx_status) * NUMTXDESC)); - - writel(NUMRXDESC, &mac->rxdqenq); - writel(NUMRXDESC, &mac->rxstsqenq); - - /* Set the primary MAC address */ - writel(AFP_IAPRIMARY, &mac->afp); - writel(mac_addr[0] | (mac_addr[1] << 8) | - (mac_addr[2] << 16) | (mac_addr[3] << 24), - &mac->indad); - writel(mac_addr[4] | (mac_addr[5] << 8), &mac->indad_upper); - - /* Turn on RX and TX */ - writel(RXCTL_IA0 | RXCTL_BA | RXCTL_SRXON | - RXCTL_RCRCA | RXCTL_MA, &mac->rxctl); - writel(TXCTL_STXON, &mac->txctl); - - /* Dump data structures if we're debugging */ - dump_dev(dev); - dump_rx_descriptor_queue(dev); - dump_rx_status_queue(dev); - dump_tx_descriptor_queue(dev); - dump_tx_status_queue(dev); - - debug("-ep93xx_eth_open"); - - return 1; -} - -/** - * Halt EP93xx MAC transmit and receive by clearing the TxCTL and RxCTL - * registers. - */ -static void ep93xx_eth_close(struct eth_device *dev) -{ - struct mac_regs *mac = GET_REGS(dev); - - debug("+ep93xx_eth_close"); - - writel(0x00000000, &mac->rxctl); - writel(0x00000000, &mac->txctl); - - debug("-ep93xx_eth_close"); -} - -/** - * Copy a frame of data from the MAC into the protocol layer for further - * processing. - */ -static int ep93xx_eth_rcv_packet(struct eth_device *dev) -{ - struct mac_regs *mac = GET_REGS(dev); - struct ep93xx_priv *priv = GET_PRIV(dev); - int len = -1; - - debug("+ep93xx_eth_rcv_packet"); - - if (RX_STATUS_RFP(priv->rx_sq.current)) { - if (RX_STATUS_RWE(priv->rx_sq.current)) { - /* - * We have a good frame. Extract the frame's length - * from the current rx_status_queue entry, and copy - * the frame's data into net_rx_packets[] of the - * protocol stack. We track the total number of - * bytes in the frame (nbytes_frame) which will be - * used when we pass the data off to the protocol - * layer via net_process_received_packet(). - */ - len = RX_STATUS_FRAME_LEN(priv->rx_sq.current); - - net_process_received_packet( - (uchar *)priv->rx_dq.current->word1, len); - - debug("reporting %d bytes...\n", len); - } else { - /* Do we have an erroneous packet? */ - pr_err("packet rx error, status %08X %08X", - priv->rx_sq.current->word1, - priv->rx_sq.current->word2); - dump_rx_descriptor_queue(dev); - dump_rx_status_queue(dev); - } - - /* - * Clear the associated status queue entry, and - * increment our current pointers to the next RX - * descriptor and status queue entries (making sure - * we wrap properly). - */ - memset((void *)priv->rx_sq.current, 0, - sizeof(struct rx_status)); - - priv->rx_sq.current++; - if (priv->rx_sq.current >= priv->rx_sq.end) - priv->rx_sq.current = priv->rx_sq.base; - - priv->rx_dq.current++; - if (priv->rx_dq.current >= priv->rx_dq.end) - priv->rx_dq.current = priv->rx_dq.base; - - /* - * Finally, return the RX descriptor and status entries - * back to the MAC engine, and loop again, checking for - * more descriptors to process. - */ - writel(1, &mac->rxdqenq); - writel(1, &mac->rxstsqenq); - } else { - len = 0; - } - - debug("-ep93xx_eth_rcv_packet %d", len); - return len; -} - -/** - * Send a block of data via ethernet. - */ -static int ep93xx_eth_send_packet(struct eth_device *dev, - void * const packet, int const length) -{ - struct mac_regs *mac = GET_REGS(dev); - struct ep93xx_priv *priv = GET_PRIV(dev); - int ret = -1; - - debug("+ep93xx_eth_send_packet"); - - /* Parameter check */ - BUG_ON(packet == NULL); - - /* - * Initialize the TX descriptor queue with the new packet's info. - * Clear the associated status queue entry. Enqueue the packet - * to the MAC for transmission. - */ - - /* set buffer address */ - priv->tx_dq.current->word1 = (uint32_t)packet; - - /* set buffer length and EOF bit */ - priv->tx_dq.current->word2 = length | TX_DESC_EOF; - - /* clear tx status */ - priv->tx_sq.current->word1 = 0; - - /* enqueue the TX descriptor */ - writel(1, &mac->txdqenq); - - /* wait for the frame to become processed */ - while (!TX_STATUS_TXFP(priv->tx_sq.current)) - ; /* noop */ - - if (!TX_STATUS_TXWE(priv->tx_sq.current)) { - pr_err("packet tx error, status %08X", - priv->tx_sq.current->word1); - dump_tx_descriptor_queue(dev); - dump_tx_status_queue(dev); - - /* TODO: Add better error handling? */ - goto eth_send_out; - } - - ret = 0; - /* Fall through */ - -eth_send_out: - debug("-ep93xx_eth_send_packet %d", ret); - return ret; -} - -#if defined(CONFIG_MII) -int ep93xx_miiphy_initialize(struct bd_info * const bd) -{ - int retval; - struct mii_dev *mdiodev = mdio_alloc(); - if (!mdiodev) - return -ENOMEM; - strlcpy(mdiodev->name, "ep93xx_eth0", MDIO_NAME_LEN); - mdiodev->read = ep93xx_miiphy_read; - mdiodev->write = ep93xx_miiphy_write; - - retval = mdio_register(mdiodev); - if (retval < 0) - return retval; - return 0; -} -#endif - -/** - * Initialize the EP93xx MAC. The MAC hardware is reset. Buffers are - * allocated, if necessary, for the TX and RX descriptor and status queues, - * as well as for received packets. The EP93XX MAC hardware is initialized. - * Transmit and receive operations are enabled. - */ -int ep93xx_eth_initialize(u8 dev_num, int base_addr) -{ - int ret = -1; - struct eth_device *dev; - struct ep93xx_priv *priv; - - debug("+ep93xx_eth_initialize"); - - priv = malloc(sizeof(*priv)); - if (!priv) { - pr_err("malloc() failed"); - goto eth_init_failed_0; - } - memset(priv, 0, sizeof(*priv)); - - priv->regs = (struct mac_regs *)base_addr; - - priv->tx_dq.base = calloc(NUMTXDESC, - sizeof(struct tx_descriptor)); - if (priv->tx_dq.base == NULL) { - pr_err("calloc() failed"); - goto eth_init_failed_1; - } - - priv->tx_sq.base = calloc(NUMTXDESC, - sizeof(struct tx_status)); - if (priv->tx_sq.base == NULL) { - pr_err("calloc() failed"); - goto eth_init_failed_2; - } - - priv->rx_dq.base = calloc(NUMRXDESC, - sizeof(struct rx_descriptor)); - if (priv->rx_dq.base == NULL) { - pr_err("calloc() failed"); - goto eth_init_failed_3; - } - - priv->rx_sq.base = calloc(NUMRXDESC, - sizeof(struct rx_status)); - if (priv->rx_sq.base == NULL) { - pr_err("calloc() failed"); - goto eth_init_failed_4; - } - - dev = malloc(sizeof *dev); - if (dev == NULL) { - pr_err("malloc() failed"); - goto eth_init_failed_5; - } - memset(dev, 0, sizeof *dev); - - dev->iobase = base_addr; - dev->priv = priv; - dev->init = ep93xx_eth_open; - dev->halt = ep93xx_eth_close; - dev->send = ep93xx_eth_send_packet; - dev->recv = ep93xx_eth_rcv_packet; - - sprintf(dev->name, "ep93xx_eth-%hu", dev_num); - - eth_register(dev); - - /* Done! */ - ret = 1; - goto eth_init_done; - -eth_init_failed_5: - free(priv->rx_sq.base); - /* Fall through */ - -eth_init_failed_4: - free(priv->rx_dq.base); - /* Fall through */ - -eth_init_failed_3: - free(priv->tx_sq.base); - /* Fall through */ - -eth_init_failed_2: - free(priv->tx_dq.base); - /* Fall through */ - -eth_init_failed_1: - free(priv); - /* Fall through */ - -eth_init_failed_0: - /* Fall through */ - -eth_init_done: - debug("-ep93xx_eth_initialize %d", ret); - return ret; -} - -#if defined(CONFIG_MII) - -/** - * Maximum MII address we support - */ -#define MII_ADDRESS_MAX 31 - -/** - * Maximum MII register address we support - */ -#define MII_REGISTER_MAX 31 - -/** - * Read a 16-bit value from an MII register. - */ -static int ep93xx_miiphy_read(struct mii_dev *bus, int addr, int devad, - int reg) -{ - unsigned short value = 0; - struct mac_regs *mac = (struct mac_regs *)MAC_BASE; - int ret = -1; - uint32_t self_ctl; - - debug("+ep93xx_miiphy_read"); - - /* Parameter checks */ - BUG_ON(bus->name == NULL); - BUG_ON(addr > MII_ADDRESS_MAX); - BUG_ON(reg > MII_REGISTER_MAX); - - /* - * Save the current SelfCTL register value. Set MAC to suppress - * preamble bits. Wait for any previous MII command to complete - * before issuing the new command. - */ - self_ctl = readl(&mac->selfctl); -#if defined(CONFIG_MII_SUPPRESS_PREAMBLE) - writel(self_ctl & ~(1 << 8), &mac->selfctl); -#endif /* defined(CONFIG_MII_SUPPRESS_PREAMBLE) */ - - while (readl(&mac->miists) & MIISTS_BUSY) - ; /* noop */ - - /* - * Issue the MII 'read' command. Wait for the command to complete. - * Read the MII data value. - */ - writel(MIICMD_OPCODE_READ | ((uint32_t)addr << 5) | (uint32_t)reg, - &mac->miicmd); - while (readl(&mac->miists) & MIISTS_BUSY) - ; /* noop */ - - value = (unsigned short)readl(&mac->miidata); - - /* Restore the saved SelfCTL value and return. */ - writel(self_ctl, &mac->selfctl); - - ret = 0; - /* Fall through */ - - debug("-ep93xx_miiphy_read"); - if (ret < 0) - return ret; - return value; -} - -/** - * Write a 16-bit value to an MII register. - */ -static int ep93xx_miiphy_write(struct mii_dev *bus, int addr, int devad, - int reg, u16 value) -{ - struct mac_regs *mac = (struct mac_regs *)MAC_BASE; - int ret = -1; - uint32_t self_ctl; - - debug("+ep93xx_miiphy_write"); - - /* Parameter checks */ - BUG_ON(bus->name == NULL); - BUG_ON(addr > MII_ADDRESS_MAX); - BUG_ON(reg > MII_REGISTER_MAX); - - /* - * Save the current SelfCTL register value. Set MAC to suppress - * preamble bits. Wait for any previous MII command to complete - * before issuing the new command. - */ - self_ctl = readl(&mac->selfctl); -#if defined(CONFIG_MII_SUPPRESS_PREAMBLE) - writel(self_ctl & ~(1 << 8), &mac->selfctl); -#endif /* defined(CONFIG_MII_SUPPRESS_PREAMBLE) */ - - while (readl(&mac->miists) & MIISTS_BUSY) - ; /* noop */ - - /* Issue the MII 'write' command. Wait for the command to complete. */ - writel((uint32_t)value, &mac->miidata); - writel(MIICMD_OPCODE_WRITE | ((uint32_t)addr << 5) | (uint32_t)reg, - &mac->miicmd); - while (readl(&mac->miists) & MIISTS_BUSY) - ; /* noop */ - - /* Restore the saved SelfCTL value and return. */ - writel(self_ctl, &mac->selfctl); - - ret = 0; - /* Fall through */ - - debug("-ep93xx_miiphy_write"); - return ret; -} -#endif /* defined(CONFIG_MII) */ |