/*
* Copyright (C) 2006, 2007 Eugene Konev
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/atomic.h>
#include <asm/mach-ar7/ar7.h>
MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>");
MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:cpmac");
static int debug_level = 8;
static int dumb_switch;
/* Next 2 are only used in cpmac_probe, so it's pointless to change them */
module_param(debug_level, int, 0444);
module_param(dumb_switch, int, 0444);
MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable");
MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus");
#define CPMAC_VERSION "0.5.2"
/* frame size + 802.1q tag + FCS size */
#define CPMAC_SKB_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
#define CPMAC_QUEUES 8
/* Ethernet registers */
#define CPMAC_TX_CONTROL 0x0004
#define CPMAC_TX_TEARDOWN 0x0008
#define CPMAC_RX_CONTROL 0x0014
#define CPMAC_RX_TEARDOWN 0x0018
#define CPMAC_MBP 0x0100
#define MBP_RXPASSCRC 0x40000000
#define MBP_RXQOS 0x20000000
#define MBP_RXNOCHAIN 0x10000000
#define MBP_RXCMF 0x01000000
#define MBP_RXSHORT 0x00800000
#define MBP_RXCEF 0x00400000
#define MBP_RXPROMISC 0x00200000
#define MBP_PROMISCCHAN(channel) (((channel) & 0x7) << 16)
#define MBP_RXBCAST 0x00002000
#define MBP_BCASTCHAN(channel) (((channel) & 0x7) << 8)
#define MBP_RXMCAST 0x00000020
#define MBP_MCASTCHAN(channel) ((channel) & 0x7)
#define CPMAC_UNICAST_ENABLE 0x0104
#define CPMAC_UNICAST_CLEAR 0x0108
#define CPMAC_MAX_LENGTH 0x010c
#define CPMAC_BUFFER_OFFSET 0x0110
#define CPMAC_MAC_CONTROL 0x0160
#define MAC_TXPTYPE 0x00000200
#define MAC_TXPACE 0x00000040
#define MAC_MII 0x00000020
#define MAC_TXFLOW 0x00000010
#define MAC_RXFLOW 0x00000008
#define MAC_MTEST 0x00000004
#define MAC_LOOPBACK 0x00000002
#define MAC_FDX 0x00000001
#define CPMAC_MAC_STATUS 0x0164
#define MAC_STATUS_QOS 0x00000004
#define MAC_STATUS_RXFLOW 0x00000002
#define MAC_STATUS_TXFLOW 0x00000001
#define CPMAC_TX_INT_ENABLE 0x0178
#define CPMAC_TX_INT_CLEAR 0x017c
#define CPMAC_MAC_INT_VECTOR 0x0180
#define MAC_INT_STATUS 0x00080000
#define MAC_INT_HOST 0x00040000
#define MAC_INT_RX 0x00020000
#define MAC_INT_TX 0x00010000
#define CPMAC_MAC_EOI_VECTOR 0x0184
#define CPMAC_RX_INT_ENABLE 0x0198
#define CPMAC_RX_INT_CLEAR 0x019c
#define CPMAC_MAC_INT_ENABLE 0x01a8
#define CPMAC_MAC_INT_CLEAR 0x01ac
#define CPMAC_MAC_ADDR_LO(channel) (0x01b0 + (channel) * 4)
#define CPMAC_MAC_ADDR_MID 0x01d0
#define CPMAC_MAC_ADDR_HI 0x01d4
#define CPMAC_MAC_HASH_LO 0x01d8
#define CPMAC_MAC_HASH_HI 0x01dc
#define CPMAC_TX_PTR(channel) (0x0600 + (channel) * 4)
#define CPMAC_RX_PTR(channel) (0x0620 + (channel) * 4)
#define CPMAC_TX_ACK(channel) (0x0640 + (channel) * 4)
#define CPMAC_RX_ACK(channel) (0x0660 + (channel) * 4)
#define CPMAC_REG_END 0x0680
/* Rx/Tx statistics
* TODO: use some of them to fill stats in cpmac_stats()
*/
#define CPMAC_STATS_RX_GOOD 0x0200
#define CPMAC_STATS_RX_BCAST 0x0204
#define CPMAC_STATS_RX_MCAST 0x0208
#define CPMAC_STATS_RX_PAUSE 0x020c
#define CPMAC_STATS_RX_CRC 0x0210
#define CPMAC_STATS_RX_ALIGN 0x0214
#define CPMAC_STATS_RX_OVER 0x0218
#define CPMAC_STATS_RX_JABBER 0x021c
#define CPMAC_STATS_RX_UNDER 0x0220
#define CPMAC_STATS_RX_FRAG 0x0224
#define CPMAC_STATS_RX_FILTER 0x0228
#define CPMAC_STATS_RX_QOSFILTER 0x022c
#define CPMAC_STATS_RX_OCTETS 0x0230
#define CPMAC_STATS_TX_GOOD 0x0234
#define CPMAC_STATS_TX_BCAST 0x0238
#define CPMAC_STATS_TX_MCAST 0x023c
#define CPMAC_STATS_TX_PAUSE 0x0240
#define CPMAC_STATS_TX_DEFER 0x0244
#define CPMAC_STATS_TX_COLLISION 0x0248
#define CPMAC_STATS_TX_SINGLECOLL 0x024c
#define CPMAC_STATS_TX_MULTICOLL 0x0250
#define CPMAC_STATS_TX_EXCESSCOLL 0x0254
#define CPMAC_STATS_TX_LATECOLL 0x0258
#define CPMAC_STATS_TX_UNDERRUN 0x025c
#define CPMAC_STATS_TX_CARRIERSENSE 0x0260
#define CPMAC_STATS_TX_OCTETS 0x0264
#define cpmac_read(base, reg) (readl((void __iomem *)(base) + (reg)))
#define cpmac_write(base, reg, val) (writel(val, (void __iomem *)(base) + \
(reg)))
/* MDIO bus */
#define CPMAC_MDIO_VERSION 0x0000
#define CPMAC_MDIO_CONTROL 0x0004
#define MDIOC_IDLE 0x80000000
#define MDIOC_ENABLE 0x40000000
#define MDIOC_PREAMBLE 0x00100000
#define MDIOC_FAULT 0x00080000
#define MDIOC_FAULTDETECT 0x00040000
#define MDIOC_INTTEST 0x00020000
#define MDIOC_CLKDIV(div) ((div) & 0xff)
#define CPMAC_MDIO_ALIVE 0x0008
#define CPMAC_MDIO_LINK 0x000c
#define CPMAC_MDIO_ACCESS(channel) (0x0080 + (channel) * 8)
#define MDIO_BUSY 0x80000000
#define MDIO_WRITE 0x40000000
#define MDIO_REG(reg) (((reg) & 0x1f