| /* |
| * 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/init.h> |
| #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_net.h> |
| #include <linux/types.h> |
| |
| #include <linux/delay.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 PHYDEF_ADDR 0x00 |
| |
| #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) |
| |
| /* Upon the upcoming introduction of device tree usage in LPC32xx, |
| * lpc_phy_interface_mode() and use_iram_for_net() will be extended with a |
| * device parameter for access to device tree information at runtime, instead |
| * of defining the values at compile time |
| */ |
| static inline phy_interface_t lpc_phy_interface_mode(void) |
| { |
| #ifdef CONFIG_ARCH_LPC32XX_MII_SUPPORT |
| return PHY_INTERFACE_MODE_MII; |
| #else |
| return PHY_INTERFACE_MODE_RMII; |
| #endif |
| } |
| |
| static inline int use_iram_for_net(void) |
| { |
| #ifdef CONFIG_ARCH_LPC32XX_IRAM_FOR_NET |
| return 1; |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* 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) |
| |
| static int lpc_eth_hard_start_xmit(struct sk_buff *skb, |
| struct net_device *ndev); |
| |
| /* |
| * 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; |
| struct sk_buff *skb[ENET_TX_DESC]; |
| unsigned int last_tx_idx; |
| unsigned int num_used_tx_buffs; |
| struct mii_bus *mii_bus; |
| struct phy_device *phy_dev; |
| 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_eth_clock_enable(struct netdata_local *pldat, |
| bool enable) |
| { |
| if (enable) |
| clk_enable(pldat->clk); |
| else |
| clk_disable(pldat->clk); |
| } |
| |
| 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() == 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 = pldat->phy_dev; |
| 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() == PHY_INTERFACE_MODE_MII) |
| netdev_info(ndev, "using MII interface\n"); |
| else |
| netdev_info(ndev, "using RMII interface\n"); |
| phydev = phy_connect(ndev, dev_name(&phydev->dev), |
| &lpc_handle_link_change, 0, lpc_phy_interface_mode()); |
| |
| 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; |
| pldat->phy_dev = phydev; |
| |
| netdev_info(ndev, |
| "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", |
| phydev->drv->name, dev_name(&phydev->dev), phydev->irq); |
| return 0; |
| } |
| |
| static int lpc_mii_init(struct netdata_local *pldat) |
| { |
| int err = -ENXIO, i; |
| |
| pldat->mii_bus = mdiobus_alloc(); |
| if (!pldat->mii_bus) { |
| err = -ENOMEM; |
| goto err_out; |
| } |
| |
| /* Setup MII mode */ |
| if (lpc_phy_interface_mode() == 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; |
| |
| pldat->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); |
| if (!pldat->mii_bus->irq) { |
| err = -ENOMEM; |
| goto err_out_1; |
| } |
| |
| for (i = 0; i < PHY_MAX_ADDR; i++) |
| pldat->mii_bus->irq[i] = PHY_POLL; |
| |
| platform_set_drvdata(pldat->pdev, pldat->mii_bus); |
| |
| if (mdiobus_register(pldat->mii_bus)) |
| goto err_out_free_mdio_irq; |
| |
| if (lpc_mii_probe(pldat->ndev) != 0) |
| goto err_out_unregister_bus; |
| |
| return 0; |
| |
| err_out_unregister_bus: |
| mdiobus_unregister(pldat->mii_bus); |
| err_out_free_mdio_irq: |
| kfree(pldat->mii_bus->irq); |
| err_out_1: |
| 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); |
| struct sk_buff *skb; |
| u32 txcidx, *ptxstat, txstat; |
| |
| txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base)); |
| while (pldat->last_tx_idx != txcidx) { |
| skb = pldat->skb[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 += skb->len; |
| |
| /* Free buffer */ |
| dev_kfree_skb_irq(skb); |
| } |
| |
| txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base)); |
| } |
| |
| 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 (pldat->phy_dev) |
| phy_stop(pldat->phy_dev); |
| |
| 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); |
| |
| __lpc_eth_clock_enable(pldat, false); |
| |
| 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->skb[txidx] = skb; |
| 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); |
| |
| 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 netdata_local *pldat = netdev_priv(ndev); |
| struct phy_device *phydev = pldat->phy_dev; |
| |
| 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); |
| |
| if (netif_msg_ifup(pldat)) |
| dev_dbg(&pldat->pdev->dev, "enabling %s\n", ndev->name); |
| |
| if (!is_valid_ether_addr(ndev->dev_addr)) |
| return -EADDRNOTAVAIL; |
| |
| __lpc_eth_clock_enable(pldat, true); |
| |
| /* Reset and initialize */ |
| __lpc_eth_reset(pldat); |
| __lpc_eth_init(pldat); |
| |
| /* schedule a link state check */ |
| phy_start(pldat->phy_dev); |
| 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) |
| { |
| strcpy(info->driver, MODNAME); |
| strcpy(info->version, DRV_VERSION); |
| strcpy(info->bus_info, dev_name(ndev->dev.parent)); |
| } |
| |
| 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 int lpc_eth_ethtool_getsettings(struct net_device *ndev, |
| struct ethtool_cmd *cmd) |
| { |
| struct netdata_local *pldat = netdev_priv(ndev); |
| struct phy_device *phydev = pldat->phy_dev; |
| |
| if (!phydev) |
| return -EOPNOTSUPP; |
| |
| return phy_ethtool_gset(phydev, cmd); |
| } |
| |
| static int lpc_eth_ethtool_setsettings(struct net_device *ndev, |
| struct ethtool_cmd *cmd) |
| { |
| struct netdata_local *pldat = netdev_priv(ndev); |
| struct phy_device *phydev = pldat->phy_dev; |
| |
| if (!phydev) |
| return -EOPNOTSUPP; |
| |
| return phy_ethtool_sset(phydev, cmd); |
| } |
| |
| static const struct ethtool_ops lpc_eth_ethtool_ops = { |
| .get_drvinfo = lpc_eth_ethtool_getdrvinfo, |
| .get_settings = lpc_eth_ethtool_getsettings, |
| .set_settings = lpc_eth_ethtool_setsettings, |
| .get_msglevel = lpc_eth_ethtool_getmsglevel, |
| .set_msglevel = lpc_eth_ethtool_setmsglevel, |
| .get_link = ethtool_op_get_link, |
| }; |
| |
| 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, |
| }; |
| |
| static int lpc_eth_drv_probe(struct platform_device *pdev) |
| { |
| struct resource *res; |
| struct resource *dma_res; |
| struct net_device *ndev; |
| struct netdata_local *pldat; |
| struct phy_device *phydev; |
| dma_addr_t dma_handle; |
| int irq, ret; |
| |
| /* Get platform resources */ |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| dma_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| irq = platform_get_irq(pdev, 0); |
| if ((!res) || (!dma_res) || (irq < 0) || (irq >= NR_IRQS)) { |
| 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 */ |
| __lpc_eth_clock_enable(pldat, true); |
| |
| /* Map IO space */ |
| pldat->net_base = ioremap(res->start, res->end - res->start + 1); |
| 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; |
| } |
| |
| /* Fill in the fields of the device structure with ethernet values. */ |
| ether_setup(ndev); |
| |
| /* 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()) { |
| dma_handle = dma_res->start; |
| if (pldat->dma_buff_size <= lpc32xx_return_iram_size()) |
| pldat->dma_buff_base_v = |
| io_p2v(dma_res->start); |
| else |
| netdev_err(ndev, |
| "IRAM not big enough for net buffers, using SDRAM instead.\n"); |
| } |
| |
| if (pldat->dma_buff_base_v == 0) { |
| 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) { |
| dev_err(&pdev->dev, "error getting DMA region.\n"); |
| ret = -ENOMEM; |
| goto err_out_free_irq; |
| } |
| } |
| pldat->dma_buff_base_p = dma_handle; |
| |
| netdev_dbg(ndev, "IO address start :0x%08x\n", |
| res->start); |
| netdev_dbg(ndev, "IO address size :%d\n", |
| res->end - res->start + 1); |
| netdev_err(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 :%d\n", pldat->dma_buff_size); |
| netdev_dbg(ndev, "DMA buffer P address :0x%08x\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); |
| |
| #ifdef CONFIG_OF_NET |
| 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); |
| } |
| #endif |
| 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); |
| |
| if (lpc_mii_init(pldat) != 0) |
| goto err_out_unregister_netdev; |
| |
| netdev_info(ndev, "LPC mac at 0x%08x irq %d\n", |
| res->start, ndev->irq); |
| |
| phydev = pldat->phy_dev; |
| |
| device_init_wakeup(&pdev->dev, 1); |
| device_set_wakeup_enable(&pdev->dev, 0); |
| |
| return 0; |
| |
| err_out_unregister_netdev: |
| platform_set_drvdata(pdev, NULL); |
| unregister_netdev(ndev); |
| err_out_dma_unmap: |
| if (!use_iram_for_net() || |
| 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(pldat->clk); |
| 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); |
| platform_set_drvdata(pdev, NULL); |
| |
| if (!use_iram_for_net() || |
| 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_free(pldat->mii_bus); |
| clk_disable(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(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 |
| |
| static struct platform_driver lpc_eth_driver = { |
| .probe = lpc_eth_drv_probe, |
| .remove = __devexit_p(lpc_eth_drv_remove), |
| #ifdef CONFIG_PM |
| .suspend = lpc_eth_drv_suspend, |
| .resume = lpc_eth_drv_resume, |
| #endif |
| .driver = { |
| .name = MODNAME, |
| }, |
| }; |
| |
| 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"); |