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tegrakernel/kernel/kernel-4.9/drivers/net/ethernet/nxp/lpc_eth.c

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initial commit tegra kernel 32.6.1
2022-02-16 09:13:02 -06:00
/*
* drivers/net/ethernet/nxp/lpc_eth.c
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2010 NXP Semiconductors
* Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/crc32.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/clk.h>
#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/phy.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/types.h>
#include <linux/io.h>
#include <mach/board.h>
#include <mach/platform.h>
#include <mach/hardware.h>
#define MODNAME "lpc-eth"
#define DRV_VERSION "1.00"
#define ENET_MAXF_SIZE 1536
#define ENET_RX_DESC 48
#define ENET_TX_DESC 16
#define NAPI_WEIGHT 16
/*
* Ethernet MAC controller Register offsets
*/
#define LPC_ENET_MAC1(x) (x + 0x000)
#define LPC_ENET_MAC2(x) (x + 0x004)
#define LPC_ENET_IPGT(x) (x + 0x008)
#define LPC_ENET_IPGR(x) (x + 0x00C)
#define LPC_ENET_CLRT(x) (x + 0x010)
#define LPC_ENET_MAXF(x) (x + 0x014)
#define LPC_ENET_SUPP(x) (x + 0x018)
#define LPC_ENET_TEST(x) (x + 0x01C)
#define LPC_ENET_MCFG(x) (x + 0x020)
#define LPC_ENET_MCMD(x) (x + 0x024)
#define LPC_ENET_MADR(x) (x + 0x028)
#define LPC_ENET_MWTD(x) (x + 0x02C)
#define LPC_ENET_MRDD(x) (x + 0x030)
#define LPC_ENET_MIND(x) (x + 0x034)
#define LPC_ENET_SA0(x) (x + 0x040)
#define LPC_ENET_SA1(x) (x + 0x044)
#define LPC_ENET_SA2(x) (x + 0x048)
#define LPC_ENET_COMMAND(x) (x + 0x100)
#define LPC_ENET_STATUS(x) (x + 0x104)
#define LPC_ENET_RXDESCRIPTOR(x) (x + 0x108)
#define LPC_ENET_RXSTATUS(x) (x + 0x10C)
#define LPC_ENET_RXDESCRIPTORNUMBER(x) (x + 0x110)
#define LPC_ENET_RXPRODUCEINDEX(x) (x + 0x114)
#define LPC_ENET_RXCONSUMEINDEX(x) (x + 0x118)
#define LPC_ENET_TXDESCRIPTOR(x) (x + 0x11C)
#define LPC_ENET_TXSTATUS(x) (x + 0x120)
#define LPC_ENET_TXDESCRIPTORNUMBER(x) (x + 0x124)
#define LPC_ENET_TXPRODUCEINDEX(x) (x + 0x128)
#define LPC_ENET_TXCONSUMEINDEX(x) (x + 0x12C)
#define LPC_ENET_TSV0(x) (x + 0x158)
#define LPC_ENET_TSV1(x) (x + 0x15C)
#define LPC_ENET_RSV(x) (x + 0x160)
#define LPC_ENET_FLOWCONTROLCOUNTER(x) (x + 0x170)
#define LPC_ENET_FLOWCONTROLSTATUS(x) (x + 0x174)
#define LPC_ENET_RXFILTER_CTRL(x) (x + 0x200)
#define LPC_ENET_RXFILTERWOLSTATUS(x) (x + 0x204)
#define LPC_ENET_RXFILTERWOLCLEAR(x) (x + 0x208)
#define LPC_ENET_HASHFILTERL(x) (x + 0x210)
#define LPC_ENET_HASHFILTERH(x) (x + 0x214)
#define LPC_ENET_INTSTATUS(x) (x + 0xFE0)
#define LPC_ENET_INTENABLE(x) (x + 0xFE4)
#define LPC_ENET_INTCLEAR(x) (x + 0xFE8)
#define LPC_ENET_INTSET(x) (x + 0xFEC)
#define LPC_ENET_POWERDOWN(x) (x + 0xFF4)
/*
* mac1 register definitions
*/
#define LPC_MAC1_RECV_ENABLE (1 << 0)
#define LPC_MAC1_PASS_ALL_RX_FRAMES (1 << 1)
#define LPC_MAC1_RX_FLOW_CONTROL (1 << 2)
#define LPC_MAC1_TX_FLOW_CONTROL (1 << 3)
#define LPC_MAC1_LOOPBACK (1 << 4)
#define LPC_MAC1_RESET_TX (1 << 8)
#define LPC_MAC1_RESET_MCS_TX (1 << 9)
#define LPC_MAC1_RESET_RX (1 << 10)
#define LPC_MAC1_RESET_MCS_RX (1 << 11)
#define LPC_MAC1_SIMULATION_RESET (1 << 14)
#define LPC_MAC1_SOFT_RESET (1 << 15)
/*
* mac2 register definitions
*/
#define LPC_MAC2_FULL_DUPLEX (1 << 0)
#define LPC_MAC2_FRAME_LENGTH_CHECKING (1 << 1)
#define LPC_MAC2_HUGH_LENGTH_CHECKING (1 << 2)
#define LPC_MAC2_DELAYED_CRC (1 << 3)
#define LPC_MAC2_CRC_ENABLE (1 << 4)
#define LPC_MAC2_PAD_CRC_ENABLE (1 << 5)
#define LPC_MAC2_VLAN_PAD_ENABLE (1 << 6)
#define LPC_MAC2_AUTO_DETECT_PAD_ENABLE (1 << 7)
#define LPC_MAC2_PURE_PREAMBLE_ENFORCEMENT (1 << 8)
#define LPC_MAC2_LONG_PREAMBLE_ENFORCEMENT (1 << 9)
#define LPC_MAC2_NO_BACKOFF (1 << 12)
#define LPC_MAC2_BACK_PRESSURE (1 << 13)
#define LPC_MAC2_EXCESS_DEFER (1 << 14)
/*
* ipgt register definitions
*/
#define LPC_IPGT_LOAD(n) ((n) & 0x7F)
/*
* ipgr register definitions
*/
#define LPC_IPGR_LOAD_PART2(n) ((n) & 0x7F)
#define LPC_IPGR_LOAD_PART1(n) (((n) & 0x7F) << 8)
/*
* clrt register definitions
*/
#define LPC_CLRT_LOAD_RETRY_MAX(n) ((n) & 0xF)
#define LPC_CLRT_LOAD_COLLISION_WINDOW(n) (((n) & 0x3F) << 8)
/*
* maxf register definitions
*/
#define LPC_MAXF_LOAD_MAX_FRAME_LEN(n) ((n) & 0xFFFF)
/*
* supp register definitions
*/
#define LPC_SUPP_SPEED (1 << 8)
#define LPC_SUPP_RESET_RMII (1 << 11)
/*
* test register definitions
*/
#define LPC_TEST_SHORTCUT_PAUSE_QUANTA (1 << 0)
#define LPC_TEST_PAUSE (1 << 1)
#define LPC_TEST_BACKPRESSURE (1 << 2)
/*
* mcfg register definitions
*/
#define LPC_MCFG_SCAN_INCREMENT (1 << 0)
#define LPC_MCFG_SUPPRESS_PREAMBLE (1 << 1)
#define LPC_MCFG_CLOCK_SELECT(n) (((n) & 0x7) << 2)
#define LPC_MCFG_CLOCK_HOST_DIV_4 0
#define LPC_MCFG_CLOCK_HOST_DIV_6 2
#define LPC_MCFG_CLOCK_HOST_DIV_8 3
#define LPC_MCFG_CLOCK_HOST_DIV_10 4
#define LPC_MCFG_CLOCK_HOST_DIV_14 5
#define LPC_MCFG_CLOCK_HOST_DIV_20 6
#define LPC_MCFG_CLOCK_HOST_DIV_28 7
#define LPC_MCFG_RESET_MII_MGMT (1 << 15)
/*
* mcmd register definitions
*/
#define LPC_MCMD_READ (1 << 0)
#define LPC_MCMD_SCAN (1 << 1)
/*
* madr register definitions
*/
#define LPC_MADR_REGISTER_ADDRESS(n) ((n) & 0x1F)
#define LPC_MADR_PHY_0ADDRESS(n) (((n) & 0x1F) << 8)
/*
* mwtd register definitions
*/
#define LPC_MWDT_WRITE(n) ((n) & 0xFFFF)
/*
* mrdd register definitions
*/
#define LPC_MRDD_READ_MASK 0xFFFF
/*
* mind register definitions
*/
#define LPC_MIND_BUSY (1 << 0)
#define LPC_MIND_SCANNING (1 << 1)
#define LPC_MIND_NOT_VALID (1 << 2)
#define LPC_MIND_MII_LINK_FAIL (1 << 3)
/*
* command register definitions
*/
#define LPC_COMMAND_RXENABLE (1 << 0)
#define LPC_COMMAND_TXENABLE (1 << 1)
#define LPC_COMMAND_REG_RESET (1 << 3)
#define LPC_COMMAND_TXRESET (1 << 4)
#define LPC_COMMAND_RXRESET (1 << 5)
#define LPC_COMMAND_PASSRUNTFRAME (1 << 6)
#define LPC_COMMAND_PASSRXFILTER (1 << 7)
#define LPC_COMMAND_TXFLOWCONTROL (1 << 8)
#define LPC_COMMAND_RMII (1 << 9)
#define LPC_COMMAND_FULLDUPLEX (1 << 10)
/*
* status register definitions
*/
#define LPC_STATUS_RXACTIVE (1 << 0)
#define LPC_STATUS_TXACTIVE (1 << 1)
/*
* tsv0 register definitions
*/
#define LPC_TSV0_CRC_ERROR (1 << 0)
#define LPC_TSV0_LENGTH_CHECK_ERROR (1 << 1)
#define LPC_TSV0_LENGTH_OUT_OF_RANGE (1 << 2)
#define LPC_TSV0_DONE (1 << 3)
#define LPC_TSV0_MULTICAST (1 << 4)
#define LPC_TSV0_BROADCAST (1 << 5)
#define LPC_TSV0_PACKET_DEFER (1 << 6)
#define LPC_TSV0_ESCESSIVE_DEFER (1 << 7)
#define LPC_TSV0_ESCESSIVE_COLLISION (1 << 8)
#define LPC_TSV0_LATE_COLLISION (1 << 9)
#define LPC_TSV0_GIANT (1 << 10)
#define LPC_TSV0_UNDERRUN (1 << 11)
#define LPC_TSV0_TOTAL_BYTES(n) (((n) >> 12) & 0xFFFF)
#define LPC_TSV0_CONTROL_FRAME (1 << 28)
#define LPC_TSV0_PAUSE (1 << 29)
#define LPC_TSV0_BACKPRESSURE (1 << 30)
#define LPC_TSV0_VLAN (1 << 31)
/*
* tsv1 register definitions
*/
#define LPC_TSV1_TRANSMIT_BYTE_COUNT(n) ((n) & 0xFFFF)
#define LPC_TSV1_COLLISION_COUNT(n) (((n) >> 16) & 0xF)
/*
* rsv register definitions
*/
#define LPC_RSV_RECEIVED_BYTE_COUNT(n) ((n) & 0xFFFF)
#define LPC_RSV_RXDV_EVENT_IGNORED (1 << 16)
#define LPC_RSV_RXDV_EVENT_PREVIOUSLY_SEEN (1 << 17)
#define LPC_RSV_CARRIER_EVNT_PREVIOUS_SEEN (1 << 18)
#define LPC_RSV_RECEIVE_CODE_VIOLATION (1 << 19)
#define LPC_RSV_CRC_ERROR (1 << 20)
#define LPC_RSV_LENGTH_CHECK_ERROR (1 << 21)
#define LPC_RSV_LENGTH_OUT_OF_RANGE (1 << 22)
#define LPC_RSV_RECEIVE_OK (1 << 23)
#define LPC_RSV_MULTICAST (1 << 24)
#define LPC_RSV_BROADCAST (1 << 25)
#define LPC_RSV_DRIBBLE_NIBBLE (1 << 26)
#define LPC_RSV_CONTROL_FRAME (1 << 27)
#define LPC_RSV_PAUSE (1 << 28)
#define LPC_RSV_UNSUPPORTED_OPCODE (1 << 29)
#define LPC_RSV_VLAN (1 << 30)
/*
* flowcontrolcounter register definitions
*/
#define LPC_FCCR_MIRRORCOUNTER(n) ((n) & 0xFFFF)
#define LPC_FCCR_PAUSETIMER(n) (((n) >> 16) & 0xFFFF)
/*
* flowcontrolstatus register definitions
*/
#define LPC_FCCR_MIRRORCOUNTERCURRENT(n) ((n) & 0xFFFF)
/*
* rxfliterctrl, rxfilterwolstatus, and rxfilterwolclear shared
* register definitions
*/
#define LPC_RXFLTRW_ACCEPTUNICAST (1 << 0)
#define LPC_RXFLTRW_ACCEPTUBROADCAST (1 << 1)
#define LPC_RXFLTRW_ACCEPTUMULTICAST (1 << 2)
#define LPC_RXFLTRW_ACCEPTUNICASTHASH (1 << 3)
#define LPC_RXFLTRW_ACCEPTUMULTICASTHASH (1 << 4)
#define LPC_RXFLTRW_ACCEPTPERFECT (1 << 5)
/*
* rxfliterctrl register definitions
*/
#define LPC_RXFLTRWSTS_MAGICPACKETENWOL (1 << 12)
#define LPC_RXFLTRWSTS_RXFILTERENWOL (1 << 13)
/*
* rxfilterwolstatus/rxfilterwolclear register definitions
*/
#define LPC_RXFLTRWSTS_RXFILTERWOL (1 << 7)
#define LPC_RXFLTRWSTS_MAGICPACKETWOL (1 << 8)
/*
* intstatus, intenable, intclear, and Intset shared register
* definitions
*/
#define LPC_MACINT_RXOVERRUNINTEN (1 << 0)
#define LPC_MACINT_RXERRORONINT (1 << 1)
#define LPC_MACINT_RXFINISHEDINTEN (1 << 2)
#define LPC_MACINT_RXDONEINTEN (1 << 3)
#define LPC_MACINT_TXUNDERRUNINTEN (1 << 4)
#define LPC_MACINT_TXERRORINTEN (1 << 5)
#define LPC_MACINT_TXFINISHEDINTEN (1 << 6)
#define LPC_MACINT_TXDONEINTEN (1 << 7)
#define LPC_MACINT_SOFTINTEN (1 << 12)
#define LPC_MACINT_WAKEUPINTEN (1 << 13)
/*
* powerdown register definitions
*/
#define LPC_POWERDOWN_MACAHB (1 << 31)
static phy_interface_t lpc_phy_interface_mode(struct device *dev)
{
if (dev && dev->of_node) {
const char *mode = of_get_property(dev->of_node,
"phy-mode", NULL);
if (mode && !strcmp(mode, "mii"))
return PHY_INTERFACE_MODE_MII;
}
return PHY_INTERFACE_MODE_RMII;
}
static bool use_iram_for_net(struct device *dev)
{
if (dev && dev->of_node)
return of_property_read_bool(dev->of_node, "use-iram");
return false;
}
/* Receive Status information word */
#define RXSTATUS_SIZE 0x000007FF
#define RXSTATUS_CONTROL (1 << 18)
#define RXSTATUS_VLAN (1 << 19)
#define RXSTATUS_FILTER (1 << 20)
#define RXSTATUS_MULTICAST (1 << 21)
#define RXSTATUS_BROADCAST (1 << 22)
#define RXSTATUS_CRC (1 << 23)
#define RXSTATUS_SYMBOL (1 << 24)
#define RXSTATUS_LENGTH (1 << 25)
#define RXSTATUS_RANGE (1 << 26)
#define RXSTATUS_ALIGN (1 << 27)
#define RXSTATUS_OVERRUN (1 << 28)
#define RXSTATUS_NODESC (1 << 29)
#define RXSTATUS_LAST (1 << 30)
#define RXSTATUS_ERROR (1 << 31)
#define RXSTATUS_STATUS_ERROR \
(RXSTATUS_NODESC | RXSTATUS_OVERRUN | RXSTATUS_ALIGN | \
RXSTATUS_RANGE | RXSTATUS_LENGTH | RXSTATUS_SYMBOL | RXSTATUS_CRC)
/* Receive Descriptor control word */
#define RXDESC_CONTROL_SIZE 0x000007FF
#define RXDESC_CONTROL_INT (1 << 31)
/* Transmit Status information word */
#define TXSTATUS_COLLISIONS_GET(x) (((x) >> 21) & 0xF)
#define TXSTATUS_DEFER (1 << 25)
#define TXSTATUS_EXCESSDEFER (1 << 26)
#define TXSTATUS_EXCESSCOLL (1 << 27)
#define TXSTATUS_LATECOLL (1 << 28)
#define TXSTATUS_UNDERRUN (1 << 29)
#define TXSTATUS_NODESC (1 << 30)
#define TXSTATUS_ERROR (1 << 31)
/* Transmit Descriptor control word */
#define TXDESC_CONTROL_SIZE 0x000007FF
#define TXDESC_CONTROL_OVERRIDE (1 << 26)
#define TXDESC_CONTROL_HUGE (1 << 27)
#define TXDESC_CONTROL_PAD (1 << 28)
#define TXDESC_CONTROL_CRC (1 << 29)
#define TXDESC_CONTROL_LAST (1 << 30)
#define TXDESC_CONTROL_INT (1 << 31)
/*
* Structure of a TX/RX descriptors and RX status
*/
struct txrx_desc_t {
__le32 packet;
__le32 control;
};
struct rx_status_t {
__le32 statusinfo;
__le32 statushashcrc;
};
/*
* Device driver data structure
*/
struct netdata_local {
struct platform_device *pdev;
struct net_device *ndev;
spinlock_t lock;
void __iomem *net_base;
u32 msg_enable;
unsigned int skblen[ENET_TX_DESC];
unsigned int last_tx_idx;
unsigned int num_used_tx_buffs;
struct mii_bus *mii_bus;
struct clk *clk;
dma_addr_t dma_buff_base_p;
void *dma_buff_base_v;
size_t dma_buff_size;
struct txrx_desc_t *tx_desc_v;
u32 *tx_stat_v;
void *tx_buff_v;
struct txrx_desc_t *rx_desc_v;
struct rx_status_t *rx_stat_v;
void *rx_buff_v;
int link;
int speed;
int duplex;
struct napi_struct napi;
};
/*
* MAC support functions
*/
static void __lpc_set_mac(struct netdata_local *pldat, u8 *mac)
{
u32 tmp;
/* Set station address */
tmp = mac[0] | ((u32)mac[1] << 8);
writel(tmp, LPC_ENET_SA2(pldat->net_base));
tmp = mac[2] | ((u32)mac[3] << 8);
writel(tmp, LPC_ENET_SA1(pldat->net_base));
tmp = mac[4] | ((u32)mac[5] << 8);
writel(tmp, LPC_ENET_SA0(pldat->net_base));
netdev_dbg(pldat->ndev, "Ethernet MAC address %pM\n", mac);
}
static void __lpc_get_mac(struct netdata_local *pldat, u8 *mac)
{
u32 tmp;
/* Get station address */
tmp = readl(LPC_ENET_SA2(pldat->net_base));
mac[0] = tmp & 0xFF;
mac[1] = tmp >> 8;
tmp = readl(LPC_ENET_SA1(pldat->net_base));
mac[2] = tmp & 0xFF;
mac[3] = tmp >> 8;
tmp = readl(LPC_ENET_SA0(pldat->net_base));
mac[4] = tmp & 0xFF;
mac[5] = tmp >> 8;
}
static void __lpc_params_setup(struct netdata_local *pldat)
{
u32 tmp;
if (pldat->duplex == DUPLEX_FULL) {
tmp = readl(LPC_ENET_MAC2(pldat->net_base));
tmp |= LPC_MAC2_FULL_DUPLEX;
writel(tmp, LPC_ENET_MAC2(pldat->net_base));
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
tmp |= LPC_COMMAND_FULLDUPLEX;
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
writel(LPC_IPGT_LOAD(0x15), LPC_ENET_IPGT(pldat->net_base));
} else {
tmp = readl(LPC_ENET_MAC2(pldat->net_base));
tmp &= ~LPC_MAC2_FULL_DUPLEX;
writel(tmp, LPC_ENET_MAC2(pldat->net_base));
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
tmp &= ~LPC_COMMAND_FULLDUPLEX;
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
writel(LPC_IPGT_LOAD(0x12), LPC_ENET_IPGT(pldat->net_base));
}
if (pldat->speed == SPEED_100)
writel(LPC_SUPP_SPEED, LPC_ENET_SUPP(pldat->net_base));
else
writel(0, LPC_ENET_SUPP(pldat->net_base));
}
static void __lpc_eth_reset(struct netdata_local *pldat)
{
/* Reset all MAC logic */
writel((LPC_MAC1_RESET_TX | LPC_MAC1_RESET_MCS_TX | LPC_MAC1_RESET_RX |
LPC_MAC1_RESET_MCS_RX | LPC_MAC1_SIMULATION_RESET |
LPC_MAC1_SOFT_RESET), LPC_ENET_MAC1(pldat->net_base));
writel((LPC_COMMAND_REG_RESET | LPC_COMMAND_TXRESET |
LPC_COMMAND_RXRESET), LPC_ENET_COMMAND(pldat->net_base));
}
static int __lpc_mii_mngt_reset(struct netdata_local *pldat)
{
/* Reset MII management hardware */
writel(LPC_MCFG_RESET_MII_MGMT, LPC_ENET_MCFG(pldat->net_base));
/* Setup MII clock to slowest rate with a /28 divider */
writel(LPC_MCFG_CLOCK_SELECT(LPC_MCFG_CLOCK_HOST_DIV_28),
LPC_ENET_MCFG(pldat->net_base));
return 0;
}
static inline phys_addr_t __va_to_pa(void *addr, struct netdata_local *pldat)
{
phys_addr_t phaddr;
phaddr = addr - pldat->dma_buff_base_v;
phaddr += pldat->dma_buff_base_p;
return phaddr;
}
static void lpc_eth_enable_int(void __iomem *regbase)
{
writel((LPC_MACINT_RXDONEINTEN | LPC_MACINT_TXDONEINTEN),
LPC_ENET_INTENABLE(regbase));
}
static void lpc_eth_disable_int(void __iomem *regbase)
{
writel(0, LPC_ENET_INTENABLE(regbase));
}
/* Setup TX/RX descriptors */
static void __lpc_txrx_desc_setup(struct netdata_local *pldat)
{
u32 *ptxstat;
void *tbuff;
int i;
struct txrx_desc_t *ptxrxdesc;
struct rx_status_t *prxstat;
tbuff = PTR_ALIGN(pldat->dma_buff_base_v, 16);
/* Setup TX descriptors, status, and buffers */
pldat->tx_desc_v = tbuff;
tbuff += sizeof(struct txrx_desc_t) * ENET_TX_DESC;
pldat->tx_stat_v = tbuff;
tbuff += sizeof(u32) * ENET_TX_DESC;
tbuff = PTR_ALIGN(tbuff, 16);
pldat->tx_buff_v = tbuff;
tbuff += ENET_MAXF_SIZE * ENET_TX_DESC;
/* Setup RX descriptors, status, and buffers */
pldat->rx_desc_v = tbuff;
tbuff += sizeof(struct txrx_desc_t) * ENET_RX_DESC;
tbuff = PTR_ALIGN(tbuff, 16);
pldat->rx_stat_v = tbuff;
tbuff += sizeof(struct rx_status_t) * ENET_RX_DESC;
tbuff = PTR_ALIGN(tbuff, 16);
pldat->rx_buff_v = tbuff;
tbuff += ENET_MAXF_SIZE * ENET_RX_DESC;
/* Map the TX descriptors to the TX buffers in hardware */
for (i = 0; i < ENET_TX_DESC; i++) {
ptxstat = &pldat->tx_stat_v[i];
ptxrxdesc = &pldat->tx_desc_v[i];
ptxrxdesc->packet = __va_to_pa(
pldat->tx_buff_v + i * ENET_MAXF_SIZE, pldat);
ptxrxdesc->control = 0;
*ptxstat = 0;
}
/* Map the RX descriptors to the RX buffers in hardware */
for (i = 0; i < ENET_RX_DESC; i++) {
prxstat = &pldat->rx_stat_v[i];
ptxrxdesc = &pldat->rx_desc_v[i];
ptxrxdesc->packet = __va_to_pa(
pldat->rx_buff_v + i * ENET_MAXF_SIZE, pldat);
ptxrxdesc->control = RXDESC_CONTROL_INT | (ENET_MAXF_SIZE - 1);
prxstat->statusinfo = 0;
prxstat->statushashcrc = 0;
}
/* Setup base addresses in hardware to point to buffers and
* descriptors
*/
writel((ENET_TX_DESC - 1),
LPC_ENET_TXDESCRIPTORNUMBER(pldat->net_base));
writel(__va_to_pa(pldat->tx_desc_v, pldat),
LPC_ENET_TXDESCRIPTOR(pldat->net_base));
writel(__va_to_pa(pldat->tx_stat_v, pldat),
LPC_ENET_TXSTATUS(pldat->net_base));
writel((ENET_RX_DESC - 1),
LPC_ENET_RXDESCRIPTORNUMBER(pldat->net_base));
writel(__va_to_pa(pldat->rx_desc_v, pldat),
LPC_ENET_RXDESCRIPTOR(pldat->net_base));
writel(__va_to_pa(pldat->rx_stat_v, pldat),
LPC_ENET_RXSTATUS(pldat->net_base));
}
static void __lpc_eth_init(struct netdata_local *pldat)
{
u32 tmp;
/* Disable controller and reset */
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
tmp &= ~LPC_COMMAND_RXENABLE | LPC_COMMAND_TXENABLE;
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
tmp = readl(LPC_ENET_MAC1(pldat->net_base));
tmp &= ~LPC_MAC1_RECV_ENABLE;
writel(tmp, LPC_ENET_MAC1(pldat->net_base));
/* Initial MAC setup */
writel(LPC_MAC1_PASS_ALL_RX_FRAMES, LPC_ENET_MAC1(pldat->net_base));
writel((LPC_MAC2_PAD_CRC_ENABLE | LPC_MAC2_CRC_ENABLE),
LPC_ENET_MAC2(pldat->net_base));
writel(ENET_MAXF_SIZE, LPC_ENET_MAXF(pldat->net_base));
/* Collision window, gap */
writel((LPC_CLRT_LOAD_RETRY_MAX(0xF) |
LPC_CLRT_LOAD_COLLISION_WINDOW(0x37)),
LPC_ENET_CLRT(pldat->net_base));
writel(LPC_IPGR_LOAD_PART2(0x12), LPC_ENET_IPGR(pldat->net_base));
if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII)
writel(LPC_COMMAND_PASSRUNTFRAME,
LPC_ENET_COMMAND(pldat->net_base));
else {
writel((LPC_COMMAND_PASSRUNTFRAME | LPC_COMMAND_RMII),
LPC_ENET_COMMAND(pldat->net_base));
writel(LPC_SUPP_RESET_RMII, LPC_ENET_SUPP(pldat->net_base));
}
__lpc_params_setup(pldat);
/* Setup TX and RX descriptors */
__lpc_txrx_desc_setup(pldat);
/* Setup packet filtering */
writel((LPC_RXFLTRW_ACCEPTUBROADCAST | LPC_RXFLTRW_ACCEPTPERFECT),
LPC_ENET_RXFILTER_CTRL(pldat->net_base));
/* Get the next TX buffer output index */
pldat->num_used_tx_buffs = 0;
pldat->last_tx_idx =
readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
/* Clear and enable interrupts */
writel(0xFFFF, LPC_ENET_INTCLEAR(pldat->net_base));
smp_wmb();
lpc_eth_enable_int(pldat->net_base);
/* Enable controller */
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
tmp |= LPC_COMMAND_RXENABLE | LPC_COMMAND_TXENABLE;
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
tmp = readl(LPC_ENET_MAC1(pldat->net_base));
tmp |= LPC_MAC1_RECV_ENABLE;
writel(tmp, LPC_ENET_MAC1(pldat->net_base));
}
static void __lpc_eth_shutdown(struct netdata_local *pldat)
{
/* Reset ethernet and power down PHY */
__lpc_eth_reset(pldat);
writel(0, LPC_ENET_MAC1(pldat->net_base));
writel(0, LPC_ENET_MAC2(pldat->net_base));
}
/*
* MAC<--->PHY support functions
*/
static int lpc_mdio_read(struct mii_bus *bus, int phy_id, int phyreg)
{
struct netdata_local *pldat = bus->priv;
unsigned long timeout = jiffies + msecs_to_jiffies(100);
int lps;
writel(((phy_id << 8) | phyreg), LPC_ENET_MADR(pldat->net_base));
writel(LPC_MCMD_READ, LPC_ENET_MCMD(pldat->net_base));
/* Wait for unbusy status */
while (readl(LPC_ENET_MIND(pldat->net_base)) & LPC_MIND_BUSY) {
if (time_after(jiffies, timeout))
return -EIO;
cpu_relax();
}
lps = readl(LPC_ENET_MRDD(pldat->net_base));
writel(0, LPC_ENET_MCMD(pldat->net_base));
return lps;
}
static int lpc_mdio_write(struct mii_bus *bus, int phy_id, int phyreg,
u16 phydata)
{
struct netdata_local *pldat = bus->priv;
unsigned long timeout = jiffies + msecs_to_jiffies(100);
writel(((phy_id << 8) | phyreg), LPC_ENET_MADR(pldat->net_base));
writel(phydata, LPC_ENET_MWTD(pldat->net_base));
/* Wait for completion */
while (readl(LPC_ENET_MIND(pldat->net_base)) & LPC_MIND_BUSY) {
if (time_after(jiffies, timeout))
return -EIO;
cpu_relax();
}
return 0;
}
static int lpc_mdio_reset(struct mii_bus *bus)
{
return __lpc_mii_mngt_reset((struct netdata_local *)bus->priv);
}
static void lpc_handle_link_change(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
struct phy_device *phydev = ndev->phydev;
unsigned long flags;
bool status_change = false;
spin_lock_irqsave(&pldat->lock, flags);
if (phydev->link) {
if ((pldat->speed != phydev->speed) ||
(pldat->duplex != phydev->duplex)) {
pldat->speed = phydev->speed;
pldat->duplex = phydev->duplex;
status_change = true;
}
}
if (phydev->link != pldat->link) {
if (!phydev->link) {
pldat->speed = 0;
pldat->duplex = -1;
}
pldat->link = phydev->link;
status_change = true;
}
spin_unlock_irqrestore(&pldat->lock, flags);
if (status_change)
__lpc_params_setup(pldat);
}
static int lpc_mii_probe(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
struct phy_device *phydev = phy_find_first(pldat->mii_bus);
if (!phydev) {
netdev_err(ndev, "no PHY found\n");
return -ENODEV;
}
/* Attach to the PHY */
if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII)
netdev_info(ndev, "using MII interface\n");
else
netdev_info(ndev, "using RMII interface\n");
phydev = phy_connect(ndev, phydev_name(phydev),
&lpc_handle_link_change,
lpc_phy_interface_mode(&pldat->pdev->dev));
if (IS_ERR(phydev)) {
netdev_err(ndev, "Could not attach to PHY\n");
return PTR_ERR(phydev);
}
/* mask with MAC supported features */
phydev->supported &= PHY_BASIC_FEATURES;
phydev->advertising = phydev->supported;
pldat->link = 0;
pldat->speed = 0;
pldat->duplex = -1;
phy_attached_info(phydev);
return 0;
}
static int lpc_mii_init(struct netdata_local *pldat)
{
int err = -ENXIO;
pldat->mii_bus = mdiobus_alloc();
if (!pldat->mii_bus) {
err = -ENOMEM;
goto err_out;
}
/* Setup MII mode */
if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII)
writel(LPC_COMMAND_PASSRUNTFRAME,
LPC_ENET_COMMAND(pldat->net_base));
else {
writel((LPC_COMMAND_PASSRUNTFRAME | LPC_COMMAND_RMII),
LPC_ENET_COMMAND(pldat->net_base));
writel(LPC_SUPP_RESET_RMII, LPC_ENET_SUPP(pldat->net_base));
}
pldat->mii_bus->name = "lpc_mii_bus";
pldat->mii_bus->read = &lpc_mdio_read;
pldat->mii_bus->write = &lpc_mdio_write;
pldat->mii_bus->reset = &lpc_mdio_reset;
snprintf(pldat->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
pldat->pdev->name, pldat->pdev->id);
pldat->mii_bus->priv = pldat;
pldat->mii_bus->parent = &pldat->pdev->dev;
platform_set_drvdata(pldat->pdev, pldat->mii_bus);
if (mdiobus_register(pldat->mii_bus))
goto err_out_unregister_bus;
err = lpc_mii_probe(pldat->ndev);
if (err)
goto err_out_unregister_bus;
return 0;
err_out_unregister_bus:
mdiobus_unregister(pldat->mii_bus);
mdiobus_free(pldat->mii_bus);
err_out:
return err;
}
static void __lpc_handle_xmit(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
u32 txcidx, *ptxstat, txstat;
txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
while (pldat->last_tx_idx != txcidx) {
unsigned int skblen = pldat->skblen[pldat->last_tx_idx];
/* A buffer is available, get buffer status */
ptxstat = &pldat->tx_stat_v[pldat->last_tx_idx];
txstat = *ptxstat;
/* Next buffer and decrement used buffer counter */
pldat->num_used_tx_buffs--;
pldat->last_tx_idx++;
if (pldat->last_tx_idx >= ENET_TX_DESC)
pldat->last_tx_idx = 0;
/* Update collision counter */
ndev->stats.collisions += TXSTATUS_COLLISIONS_GET(txstat);
/* Any errors occurred? */
if (txstat & TXSTATUS_ERROR) {
if (txstat & TXSTATUS_UNDERRUN) {
/* FIFO underrun */
ndev->stats.tx_fifo_errors++;
}
if (txstat & TXSTATUS_LATECOLL) {
/* Late collision */
ndev->stats.tx_aborted_errors++;
}
if (txstat & TXSTATUS_EXCESSCOLL) {
/* Excessive collision */
ndev->stats.tx_aborted_errors++;
}
if (txstat & TXSTATUS_EXCESSDEFER) {
/* Defer limit */
ndev->stats.tx_aborted_errors++;
}
ndev->stats.tx_errors++;
} else {
/* Update stats */
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += skblen;
}
txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
}
if (pldat->num_used_tx_buffs <= ENET_TX_DESC/2) {
if (netif_queue_stopped(ndev))
netif_wake_queue(ndev);
}
}
static int __lpc_handle_recv(struct net_device *ndev, int budget)
{
struct netdata_local *pldat = netdev_priv(ndev);
struct sk_buff *skb;
u32 rxconsidx, len, ethst;
struct rx_status_t *prxstat;
u8 *prdbuf;
int rx_done = 0;
/* Get the current RX buffer indexes */
rxconsidx = readl(LPC_ENET_RXCONSUMEINDEX(pldat->net_base));
while (rx_done < budget && rxconsidx !=
readl(LPC_ENET_RXPRODUCEINDEX(pldat->net_base))) {
/* Get pointer to receive status */
prxstat = &pldat->rx_stat_v[rxconsidx];
len = (prxstat->statusinfo & RXSTATUS_SIZE) + 1;
/* Status error? */
ethst = prxstat->statusinfo;
if ((ethst & (RXSTATUS_ERROR | RXSTATUS_STATUS_ERROR)) ==
(RXSTATUS_ERROR | RXSTATUS_RANGE))
ethst &= ~RXSTATUS_ERROR;
if (ethst & RXSTATUS_ERROR) {
int si = prxstat->statusinfo;
/* Check statuses */
if (si & RXSTATUS_OVERRUN) {
/* Overrun error */
ndev->stats.rx_fifo_errors++;
} else if (si & RXSTATUS_CRC) {
/* CRC error */
ndev->stats.rx_crc_errors++;
} else if (si & RXSTATUS_LENGTH) {
/* Length error */
ndev->stats.rx_length_errors++;
} else if (si & RXSTATUS_ERROR) {
/* Other error */
ndev->stats.rx_length_errors++;
}
ndev->stats.rx_errors++;
} else {
/* Packet is good */
skb = dev_alloc_skb(len);
if (!skb) {
ndev->stats.rx_dropped++;
} else {
prdbuf = skb_put(skb, len);
/* Copy packet from buffer */
memcpy(prdbuf, pldat->rx_buff_v +
rxconsidx * ENET_MAXF_SIZE, len);
/* Pass to upper layer */
skb->protocol = eth_type_trans(skb, ndev);
netif_receive_skb(skb);
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += len;
}
}
/* Increment consume index */
rxconsidx = rxconsidx + 1;
if (rxconsidx >= ENET_RX_DESC)
rxconsidx = 0;
writel(rxconsidx,
LPC_ENET_RXCONSUMEINDEX(pldat->net_base));
rx_done++;
}
return rx_done;
}
static int lpc_eth_poll(struct napi_struct *napi, int budget)
{
struct netdata_local *pldat = container_of(napi,
struct netdata_local, napi);
struct net_device *ndev = pldat->ndev;
int rx_done = 0;
struct netdev_queue *txq = netdev_get_tx_queue(ndev, 0);
__netif_tx_lock(txq, smp_processor_id());
__lpc_handle_xmit(ndev);
__netif_tx_unlock(txq);
rx_done = __lpc_handle_recv(ndev, budget);
if (rx_done < budget) {
napi_complete(napi);
lpc_eth_enable_int(pldat->net_base);
}
return rx_done;
}
static irqreturn_t __lpc_eth_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct netdata_local *pldat = netdev_priv(ndev);
u32 tmp;
spin_lock(&pldat->lock);
tmp = readl(LPC_ENET_INTSTATUS(pldat->net_base));
/* Clear interrupts */
writel(tmp, LPC_ENET_INTCLEAR(pldat->net_base));
lpc_eth_disable_int(pldat->net_base);
if (likely(napi_schedule_prep(&pldat->napi)))
__napi_schedule(&pldat->napi);
spin_unlock(&pldat->lock);
return IRQ_HANDLED;
}
static int lpc_eth_close(struct net_device *ndev)
{
unsigned long flags;
struct netdata_local *pldat = netdev_priv(ndev);
if (netif_msg_ifdown(pldat))
dev_dbg(&pldat->pdev->dev, "shutting down %s\n", ndev->name);
napi_disable(&pldat->napi);
netif_stop_queue(ndev);
if (ndev->phydev)
phy_stop(ndev->phydev);
spin_lock_irqsave(&pldat->lock, flags);
__lpc_eth_reset(pldat);
netif_carrier_off(ndev);
writel(0, LPC_ENET_MAC1(pldat->net_base));
writel(0, LPC_ENET_MAC2(pldat->net_base));
spin_unlock_irqrestore(&pldat->lock, flags);
clk_disable_unprepare(pldat->clk);
return 0;
}
static int lpc_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
u32 len, txidx;
u32 *ptxstat;
struct txrx_desc_t *ptxrxdesc;
len = skb->len;
spin_lock_irq(&pldat->lock);
if (pldat->num_used_tx_buffs >= (ENET_TX_DESC - 1)) {
/* This function should never be called when there are no
buffers */
netif_stop_queue(ndev);
spin_unlock_irq(&pldat->lock);
WARN(1, "BUG! TX request when no free TX buffers!\n");
return NETDEV_TX_BUSY;
}
/* Get the next TX descriptor index */
txidx = readl(LPC_ENET_TXPRODUCEINDEX(pldat->net_base));
/* Setup control for the transfer */
ptxstat = &pldat->tx_stat_v[txidx];
*ptxstat = 0;
ptxrxdesc = &pldat->tx_desc_v[txidx];
ptxrxdesc->control =
(len - 1) | TXDESC_CONTROL_LAST | TXDESC_CONTROL_INT;
/* Copy data to the DMA buffer */
memcpy(pldat->tx_buff_v + txidx * ENET_MAXF_SIZE, skb->data, len);
/* Save the buffer and increment the buffer counter */
pldat->skblen[txidx] = len;
pldat->num_used_tx_buffs++;
/* Start transmit */
txidx++;
if (txidx >= ENET_TX_DESC)
txidx = 0;
writel(txidx, LPC_ENET_TXPRODUCEINDEX(pldat->net_base));
/* Stop queue if no more TX buffers */
if (pldat->num_used_tx_buffs >= (ENET_TX_DESC - 1))
netif_stop_queue(ndev);
spin_unlock_irq(&pldat->lock);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static int lpc_set_mac_address(struct net_device *ndev, void *p)
{
struct sockaddr *addr = p;
struct netdata_local *pldat = netdev_priv(ndev);
unsigned long flags;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
memcpy(ndev->dev_addr, addr->sa_data, ETH_ALEN);
spin_lock_irqsave(&pldat->lock, flags);
/* Set station address */
__lpc_set_mac(pldat, ndev->dev_addr);
spin_unlock_irqrestore(&pldat->lock, flags);
return 0;
}
static void lpc_eth_set_multicast_list(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
struct netdev_hw_addr_list *mcptr = &ndev->mc;
struct netdev_hw_addr *ha;
u32 tmp32, hash_val, hashlo, hashhi;
unsigned long flags;
spin_lock_irqsave(&pldat->lock, flags);
/* Set station address */
__lpc_set_mac(pldat, ndev->dev_addr);
tmp32 = LPC_RXFLTRW_ACCEPTUBROADCAST | LPC_RXFLTRW_ACCEPTPERFECT;
if (ndev->flags & IFF_PROMISC)
tmp32 |= LPC_RXFLTRW_ACCEPTUNICAST |
LPC_RXFLTRW_ACCEPTUMULTICAST;
if (ndev->flags & IFF_ALLMULTI)
tmp32 |= LPC_RXFLTRW_ACCEPTUMULTICAST;
if (netdev_hw_addr_list_count(mcptr))
tmp32 |= LPC_RXFLTRW_ACCEPTUMULTICASTHASH;
writel(tmp32, LPC_ENET_RXFILTER_CTRL(pldat->net_base));
/* Set initial hash table */
hashlo = 0x0;
hashhi = 0x0;
/* 64 bits : multicast address in hash table */
netdev_hw_addr_list_for_each(ha, mcptr) {
hash_val = (ether_crc(6, ha->addr) >> 23) & 0x3F;
if (hash_val >= 32)
hashhi |= 1 << (hash_val - 32);
else
hashlo |= 1 << hash_val;
}
writel(hashlo, LPC_ENET_HASHFILTERL(pldat->net_base));
writel(hashhi, LPC_ENET_HASHFILTERH(pldat->net_base));
spin_unlock_irqrestore(&pldat->lock, flags);
}
static int lpc_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
{
struct phy_device *phydev = ndev->phydev;
if (!netif_running(ndev))
return -EINVAL;
if (!phydev)
return -ENODEV;
return phy_mii_ioctl(phydev, req, cmd);
}
static int lpc_eth_open(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
int ret;
if (netif_msg_ifup(pldat))
dev_dbg(&pldat->pdev->dev, "enabling %s\n", ndev->name);
ret = clk_prepare_enable(pldat->clk);
if (ret)
return ret;
/* Suspended PHY makes LPC ethernet core block, so resume now */
phy_resume(ndev->phydev);
/* Reset and initialize */
__lpc_eth_reset(pldat);
__lpc_eth_init(pldat);
/* schedule a link state check */
phy_start(ndev->phydev);
netif_start_queue(ndev);
napi_enable(&pldat->napi);
return 0;
}
/*
* Ethtool ops
*/
static void lpc_eth_ethtool_getdrvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, MODNAME, sizeof(info->driver));
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
strlcpy(info->bus_info, dev_name(ndev->dev.parent),
sizeof(info->bus_info));
}
static u32 lpc_eth_ethtool_getmsglevel(struct net_device *ndev)
{
struct netdata_local *pldat = netdev_priv(ndev);
return pldat->msg_enable;
}
static void lpc_eth_ethtool_setmsglevel(struct net_device *ndev, u32 level)
{
struct netdata_local *pldat = netdev_priv(ndev);
pldat->msg_enable = level;
}
static const struct ethtool_ops lpc_eth_ethtool_ops = {
.get_drvinfo = lpc_eth_ethtool_getdrvinfo,
.get_msglevel = lpc_eth_ethtool_getmsglevel,
.set_msglevel = lpc_eth_ethtool_setmsglevel,
.get_link = ethtool_op_get_link,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
static const struct net_device_ops lpc_netdev_ops = {
.ndo_open = lpc_eth_open,
.ndo_stop = lpc_eth_close,
.ndo_start_xmit = lpc_eth_hard_start_xmit,
.ndo_set_rx_mode = lpc_eth_set_multicast_list,
.ndo_do_ioctl = lpc_eth_ioctl,
.ndo_set_mac_address = lpc_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
};
static int lpc_eth_drv_probe(struct platform_device *pdev)
{
struct resource *res;
struct net_device *ndev;
struct netdata_local *pldat;
struct phy_device *phydev;
dma_addr_t dma_handle;
int irq, ret;
u32 tmp;
/* Setup network interface for RMII or MII mode */
tmp = __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL);
tmp &= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK;
if (lpc_phy_interface_mode(&pdev->dev) == PHY_INTERFACE_MODE_MII)
tmp |= LPC32XX_CLKPWR_MACCTRL_USE_MII_PINS;
else
tmp |= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS;
__raw_writel(tmp, LPC32XX_CLKPWR_MACCLK_CTRL);
/* Get platform resources */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!res || irq < 0) {
dev_err(&pdev->dev, "error getting resources.\n");
ret = -ENXIO;
goto err_exit;
}
/* Allocate net driver data structure */
ndev = alloc_etherdev(sizeof(struct netdata_local));
if (!ndev) {
dev_err(&pdev->dev, "could not allocate device.\n");
ret = -ENOMEM;
goto err_exit;
}
SET_NETDEV_DEV(ndev, &pdev->dev);
pldat = netdev_priv(ndev);
pldat->pdev = pdev;
pldat->ndev = ndev;
spin_lock_init(&pldat->lock);
/* Save resources */
ndev->irq = irq;
/* Get clock for the device */
pldat->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(pldat->clk)) {
dev_err(&pdev->dev, "error getting clock.\n");
ret = PTR_ERR(pldat->clk);
goto err_out_free_dev;
}
/* Enable network clock */
ret = clk_prepare_enable(pldat->clk);
if (ret)
goto err_out_clk_put;
/* Map IO space */
pldat->net_base = ioremap(res->start, resource_size(res));
if (!pldat->net_base) {
dev_err(&pdev->dev, "failed to map registers\n");
ret = -ENOMEM;
goto err_out_disable_clocks;
}
ret = request_irq(ndev->irq, __lpc_eth_interrupt, 0,
ndev->name, ndev);
if (ret) {
dev_err(&pdev->dev, "error requesting interrupt.\n");
goto err_out_iounmap;
}
/* Setup driver functions */
ndev->netdev_ops = &lpc_netdev_ops;
ndev->ethtool_ops = &lpc_eth_ethtool_ops;
ndev->watchdog_timeo = msecs_to_jiffies(2500);
/* Get size of DMA buffers/descriptors region */
pldat->dma_buff_size = (ENET_TX_DESC + ENET_RX_DESC) * (ENET_MAXF_SIZE +
sizeof(struct txrx_desc_t) + sizeof(struct rx_status_t));
pldat->dma_buff_base_v = 0;
if (use_iram_for_net(&pldat->pdev->dev)) {
dma_handle = LPC32XX_IRAM_BASE;
if (pldat->dma_buff_size <= lpc32xx_return_iram_size())
pldat->dma_buff_base_v =
io_p2v(LPC32XX_IRAM_BASE);
else
netdev_err(ndev,
"IRAM not big enough for net buffers, using SDRAM instead.\n");
}
if (pldat->dma_buff_base_v == 0) {
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
goto err_out_free_irq;
pldat->dma_buff_size = PAGE_ALIGN(pldat->dma_buff_size);
/* Allocate a chunk of memory for the DMA ethernet buffers
and descriptors */
pldat->dma_buff_base_v =
dma_alloc_coherent(&pldat->pdev->dev,
pldat->dma_buff_size, &dma_handle,
GFP_KERNEL);
if (pldat->dma_buff_base_v == NULL) {
ret = -ENOMEM;
goto err_out_free_irq;
}
}
pldat->dma_buff_base_p = dma_handle;
netdev_dbg(ndev, "IO address space :%pR\n", res);
netdev_dbg(ndev, "IO address size :%zd\n",
(size_t)resource_size(res));
netdev_dbg(ndev, "IO address (mapped) :0x%p\n",
pldat->net_base);
netdev_dbg(ndev, "IRQ number :%d\n", ndev->irq);
netdev_dbg(ndev, "DMA buffer size :%zd\n", pldat->dma_buff_size);
netdev_dbg(ndev, "DMA buffer P address :%pad\n",
&pldat->dma_buff_base_p);
netdev_dbg(ndev, "DMA buffer V address :0x%p\n",
pldat->dma_buff_base_v);
/* Get MAC address from current HW setting (POR state is all zeros) */
__lpc_get_mac(pldat, ndev->dev_addr);
if (!is_valid_ether_addr(ndev->dev_addr)) {
const char *macaddr = of_get_mac_address(pdev->dev.of_node);
if (macaddr)
memcpy(ndev->dev_addr, macaddr, ETH_ALEN);
}
if (!is_valid_ether_addr(ndev->dev_addr))
eth_hw_addr_random(ndev);
/* Reset the ethernet controller */
__lpc_eth_reset(pldat);
/* then shut everything down to save power */
__lpc_eth_shutdown(pldat);
/* Set default parameters */
pldat->msg_enable = NETIF_MSG_LINK;
/* Force an MII interface reset and clock setup */
__lpc_mii_mngt_reset(pldat);
/* Force default PHY interface setup in chip, this will probably be
changed by the PHY driver */
pldat->link = 0;
pldat->speed = 100;
pldat->duplex = DUPLEX_FULL;
__lpc_params_setup(pldat);
netif_napi_add(ndev, &pldat->napi, lpc_eth_poll, NAPI_WEIGHT);
ret = register_netdev(ndev);
if (ret) {
dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
goto err_out_dma_unmap;
}
platform_set_drvdata(pdev, ndev);
ret = lpc_mii_init(pldat);
if (ret)
goto err_out_unregister_netdev;
netdev_info(ndev, "LPC mac at 0x%08lx irq %d\n",
(unsigned long)res->start, ndev->irq);
phydev = ndev->phydev;
device_init_wakeup(&pdev->dev, 1);
device_set_wakeup_enable(&pdev->dev, 0);
return 0;
err_out_unregister_netdev:
unregister_netdev(ndev);
err_out_dma_unmap:
if (!use_iram_for_net(&pldat->pdev->dev) ||
pldat->dma_buff_size > lpc32xx_return_iram_size())
dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size,
pldat->dma_buff_base_v,
pldat->dma_buff_base_p);
err_out_free_irq:
free_irq(ndev->irq, ndev);
err_out_iounmap:
iounmap(pldat->net_base);
err_out_disable_clocks:
clk_disable_unprepare(pldat->clk);
err_out_clk_put:
clk_put(pldat->clk);
err_out_free_dev:
free_netdev(ndev);
err_exit:
pr_err("%s: not found (%d).\n", MODNAME, ret);
return ret;
}
static int lpc_eth_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct netdata_local *pldat = netdev_priv(ndev);
unregister_netdev(ndev);
if (!use_iram_for_net(&pldat->pdev->dev) ||
pldat->dma_buff_size > lpc32xx_return_iram_size())
dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size,
pldat->dma_buff_base_v,
pldat->dma_buff_base_p);
free_irq(ndev->irq, ndev);
iounmap(pldat->net_base);
mdiobus_unregister(pldat->mii_bus);
mdiobus_free(pldat->mii_bus);
clk_disable_unprepare(pldat->clk);
clk_put(pldat->clk);
free_netdev(ndev);
return 0;
}
#ifdef CONFIG_PM
static int lpc_eth_drv_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct netdata_local *pldat = netdev_priv(ndev);
if (device_may_wakeup(&pdev->dev))
enable_irq_wake(ndev->irq);
if (ndev) {
if (netif_running(ndev)) {
netif_device_detach(ndev);
__lpc_eth_shutdown(pldat);
clk_disable_unprepare(pldat->clk);
/*
* Reset again now clock is disable to be sure
* EMC_MDC is down
*/
__lpc_eth_reset(pldat);
}
}
return 0;
}
static int lpc_eth_drv_resume(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct netdata_local *pldat;
if (device_may_wakeup(&pdev->dev))
disable_irq_wake(ndev->irq);
if (ndev) {
if (netif_running(ndev)) {
pldat = netdev_priv(ndev);
/* Enable interface clock */
clk_enable(pldat->clk);
/* Reset and initialize */
__lpc_eth_reset(pldat);
__lpc_eth_init(pldat);
netif_device_attach(ndev);
}
}
return 0;
}
#endif
#ifdef CONFIG_OF
static const struct of_device_id lpc_eth_match[] = {
{ .compatible = "nxp,lpc-eth" },
{ }
};
MODULE_DEVICE_TABLE(of, lpc_eth_match);
#endif
static struct platform_driver lpc_eth_driver = {
.probe = lpc_eth_drv_probe,
.remove = lpc_eth_drv_remove,
#ifdef CONFIG_PM
.suspend = lpc_eth_drv_suspend,
.resume = lpc_eth_drv_resume,
#endif
.driver = {
.name = MODNAME,
.of_match_table = of_match_ptr(lpc_eth_match),
},
};
module_platform_driver(lpc_eth_driver);
MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com>");
MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
MODULE_DESCRIPTION("LPC Ethernet Driver");
MODULE_LICENSE("GPL");