Commit 47dd7a54 authored by Giuseppe Cavallaro's avatar Giuseppe Cavallaro Committed by David S. Miller
Browse files

net: add support for STMicroelectronics Ethernet controllers.

This is the driver for the ST MAC 10/100/1000 on-chip Ethernet
controllers (Synopsys IP blocks).

Driver documentation:
 o http://stlinux.com/drupal/kernel/network/stmmac
Revisions:
 o http://stlinux.com/drupal/kernel/network/stmmac-driver-revisions
Performances:
 o http://stlinux.com/drupal/benchmarks/networking/stmmac

Signed-off-by: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 47a01a0c
......@@ -2483,6 +2483,8 @@ config S6GMAC
To compile this driver as a module, choose M here. The module
will be called s6gmac.
source "drivers/net/stmmac/Kconfig"
endif # NETDEV_1000
#
......
......@@ -100,6 +100,7 @@ obj-$(CONFIG_VIA_VELOCITY) += via-velocity.o
obj-$(CONFIG_ADAPTEC_STARFIRE) += starfire.o
obj-$(CONFIG_RIONET) += rionet.o
obj-$(CONFIG_SH_ETH) += sh_eth.o
obj-$(CONFIG_STMMAC_ETH) += stmmac/
#
# end link order section
......
config STMMAC_ETH
tristate "STMicroelectronics 10/100/1000 Ethernet driver"
select MII
select PHYLIB
depends on NETDEVICES && CPU_SUBTYPE_ST40
help
This is the driver for the ST MAC 10/100/1000 on-chip Ethernet
controllers. ST Ethernet IPs are built around a Synopsys IP Core.
if STMMAC_ETH
config STMMAC_DA
bool "STMMAC DMA arbitration scheme"
default n
help
Selecting this option, rx has priority over Tx (only for Giga
Ethernet device).
By default, the DMA arbitration scheme is based on Round-robin
(rx:tx priority is 1:1).
config STMMAC_DUAL_MAC
bool "STMMAC: dual mac support (EXPERIMENTAL)"
default n
depends on EXPERIMENTAL && STMMAC_ETH && !STMMAC_TIMER
help
Some ST SoCs (for example the stx7141 and stx7200c2) have two
Ethernet Controllers. This option turns on the second Ethernet
device on this kind of platforms.
config STMMAC_TIMER
bool "STMMAC Timer optimisation"
default n
help
Use an external timer for mitigating the number of network
interrupts.
choice
prompt "Select Timer device"
depends on STMMAC_TIMER
config STMMAC_TMU_TIMER
bool "TMU channel 2"
depends on CPU_SH4
help
config STMMAC_RTC_TIMER
bool "Real time clock"
depends on RTC_CLASS
help
endchoice
endif
obj-$(CONFIG_STMMAC_ETH) += stmmac.o
stmmac-$(CONFIG_STMMAC_TIMER) += stmmac_timer.o
stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o \
mac100.o gmac.o $(stmmac-y)
/*******************************************************************************
STMMAC Common Header File
Copyright (C) 2007-2009 STMicroelectronics Ltd
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope 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.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
#include "descs.h"
#include <linux/io.h>
/* *********************************************
DMA CRS Control and Status Register Mapping
* *********************************************/
#define DMA_BUS_MODE 0x00001000 /* Bus Mode */
#define DMA_XMT_POLL_DEMAND 0x00001004 /* Transmit Poll Demand */
#define DMA_RCV_POLL_DEMAND 0x00001008 /* Received Poll Demand */
#define DMA_RCV_BASE_ADDR 0x0000100c /* Receive List Base */
#define DMA_TX_BASE_ADDR 0x00001010 /* Transmit List Base */
#define DMA_STATUS 0x00001014 /* Status Register */
#define DMA_CONTROL 0x00001018 /* Ctrl (Operational Mode) */
#define DMA_INTR_ENA 0x0000101c /* Interrupt Enable */
#define DMA_MISSED_FRAME_CTR 0x00001020 /* Missed Frame Counter */
#define DMA_CUR_TX_BUF_ADDR 0x00001050 /* Current Host Tx Buffer */
#define DMA_CUR_RX_BUF_ADDR 0x00001054 /* Current Host Rx Buffer */
/* ********************************
DMA Control register defines
* ********************************/
#define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */
#define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */
/* **************************************
DMA Interrupt Enable register defines
* **************************************/
/**** NORMAL INTERRUPT ****/
#define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */
#define DMA_INTR_ENA_TIE 0x00000001 /* Transmit Interrupt */
#define DMA_INTR_ENA_TUE 0x00000004 /* Transmit Buffer Unavailable */
#define DMA_INTR_ENA_RIE 0x00000040 /* Receive Interrupt */
#define DMA_INTR_ENA_ERE 0x00004000 /* Early Receive */
#define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \
DMA_INTR_ENA_TIE)
/**** ABNORMAL INTERRUPT ****/
#define DMA_INTR_ENA_AIE 0x00008000 /* Abnormal Summary */
#define DMA_INTR_ENA_FBE 0x00002000 /* Fatal Bus Error */
#define DMA_INTR_ENA_ETE 0x00000400 /* Early Transmit */
#define DMA_INTR_ENA_RWE 0x00000200 /* Receive Watchdog */
#define DMA_INTR_ENA_RSE 0x00000100 /* Receive Stopped */
#define DMA_INTR_ENA_RUE 0x00000080 /* Receive Buffer Unavailable */
#define DMA_INTR_ENA_UNE 0x00000020 /* Tx Underflow */
#define DMA_INTR_ENA_OVE 0x00000010 /* Receive Overflow */
#define DMA_INTR_ENA_TJE 0x00000008 /* Transmit Jabber */
#define DMA_INTR_ENA_TSE 0x00000002 /* Transmit Stopped */
#define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \
DMA_INTR_ENA_UNE)
/* DMA default interrupt mask */
#define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
/* ****************************
* DMA Status register defines
* ****************************/
#define DMA_STATUS_GPI 0x10000000 /* PMT interrupt */
#define DMA_STATUS_GMI 0x08000000 /* MMC interrupt */
#define DMA_STATUS_GLI 0x04000000 /* GMAC Line interface int. */
#define DMA_STATUS_GMI 0x08000000
#define DMA_STATUS_GLI 0x04000000
#define DMA_STATUS_EB_MASK 0x00380000 /* Error Bits Mask */
#define DMA_STATUS_EB_TX_ABORT 0x00080000 /* Error Bits - TX Abort */
#define DMA_STATUS_EB_RX_ABORT 0x00100000 /* Error Bits - RX Abort */
#define DMA_STATUS_TS_MASK 0x00700000 /* Transmit Process State */
#define DMA_STATUS_TS_SHIFT 20
#define DMA_STATUS_RS_MASK 0x000e0000 /* Receive Process State */
#define DMA_STATUS_RS_SHIFT 17
#define DMA_STATUS_NIS 0x00010000 /* Normal Interrupt Summary */
#define DMA_STATUS_AIS 0x00008000 /* Abnormal Interrupt Summary */
#define DMA_STATUS_ERI 0x00004000 /* Early Receive Interrupt */
#define DMA_STATUS_FBI 0x00002000 /* Fatal Bus Error Interrupt */
#define DMA_STATUS_ETI 0x00000400 /* Early Transmit Interrupt */
#define DMA_STATUS_RWT 0x00000200 /* Receive Watchdog Timeout */
#define DMA_STATUS_RPS 0x00000100 /* Receive Process Stopped */
#define DMA_STATUS_RU 0x00000080 /* Receive Buffer Unavailable */
#define DMA_STATUS_RI 0x00000040 /* Receive Interrupt */
#define DMA_STATUS_UNF 0x00000020 /* Transmit Underflow */
#define DMA_STATUS_OVF 0x00000010 /* Receive Overflow */
#define DMA_STATUS_TJT 0x00000008 /* Transmit Jabber Timeout */
#define DMA_STATUS_TU 0x00000004 /* Transmit Buffer Unavailable */
#define DMA_STATUS_TPS 0x00000002 /* Transmit Process Stopped */
#define DMA_STATUS_TI 0x00000001 /* Transmit Interrupt */
/* Other defines */
#define HASH_TABLE_SIZE 64
#define PAUSE_TIME 0x200
/* Flow Control defines */
#define FLOW_OFF 0
#define FLOW_RX 1
#define FLOW_TX 2
#define FLOW_AUTO (FLOW_TX | FLOW_RX)
/* DMA STORE-AND-FORWARD Operation Mode */
#define SF_DMA_MODE 1
#define HW_CSUM 1
#define NO_HW_CSUM 0
/* GMAC TX FIFO is 8K, Rx FIFO is 16K */
#define BUF_SIZE_16KiB 16384
#define BUF_SIZE_8KiB 8192
#define BUF_SIZE_4KiB 4096
#define BUF_SIZE_2KiB 2048
/* Power Down and WOL */
#define PMT_NOT_SUPPORTED 0
#define PMT_SUPPORTED 1
/* Common MAC defines */
#define MAC_CTRL_REG 0x00000000 /* MAC Control */
#define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */
#define MAC_RNABLE_RX 0x00000004 /* Receiver Enable */
/* MAC Management Counters register */
#define MMC_CONTROL 0x00000100 /* MMC Control */
#define MMC_HIGH_INTR 0x00000104 /* MMC High Interrupt */
#define MMC_LOW_INTR 0x00000108 /* MMC Low Interrupt */
#define MMC_HIGH_INTR_MASK 0x0000010c /* MMC High Interrupt Mask */
#define MMC_LOW_INTR_MASK 0x00000110 /* MMC Low Interrupt Mask */
#define MMC_CONTROL_MAX_FRM_MASK 0x0003ff8 /* Maximum Frame Size */
#define MMC_CONTROL_MAX_FRM_SHIFT 3
#define MMC_CONTROL_MAX_FRAME 0x7FF
struct stmmac_extra_stats {
/* Transmit errors */
unsigned long tx_underflow ____cacheline_aligned;
unsigned long tx_carrier;
unsigned long tx_losscarrier;
unsigned long tx_heartbeat;
unsigned long tx_deferred;
unsigned long tx_vlan;
unsigned long tx_jabber;
unsigned long tx_frame_flushed;
unsigned long tx_payload_error;
unsigned long tx_ip_header_error;
/* Receive errors */
unsigned long rx_desc;
unsigned long rx_partial;
unsigned long rx_runt;
unsigned long rx_toolong;
unsigned long rx_collision;
unsigned long rx_crc;
unsigned long rx_lenght;
unsigned long rx_mii;
unsigned long rx_multicast;
unsigned long rx_gmac_overflow;
unsigned long rx_watchdog;
unsigned long da_rx_filter_fail;
unsigned long sa_rx_filter_fail;
unsigned long rx_missed_cntr;
unsigned long rx_overflow_cntr;
unsigned long rx_vlan;
/* Tx/Rx IRQ errors */
unsigned long tx_undeflow_irq;
unsigned long tx_process_stopped_irq;
unsigned long tx_jabber_irq;
unsigned long rx_overflow_irq;
unsigned long rx_buf_unav_irq;
unsigned long rx_process_stopped_irq;
unsigned long rx_watchdog_irq;
unsigned long tx_early_irq;
unsigned long fatal_bus_error_irq;
/* Extra info */
unsigned long threshold;
unsigned long tx_pkt_n;
unsigned long rx_pkt_n;
unsigned long poll_n;
unsigned long sched_timer_n;
unsigned long normal_irq_n;
};
/* GMAC core can compute the checksums in HW. */
enum rx_frame_status {
good_frame = 0,
discard_frame = 1,
csum_none = 2,
};
static inline void stmmac_set_mac_addr(unsigned long ioaddr, u8 addr[6],
unsigned int high, unsigned int low)
{
unsigned long data;
data = (addr[5] << 8) | addr[4];
writel(data, ioaddr + high);
data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
writel(data, ioaddr + low);
return;
}
static inline void stmmac_get_mac_addr(unsigned long ioaddr,
unsigned char *addr, unsigned int high,
unsigned int low)
{
unsigned int hi_addr, lo_addr;
/* Read the MAC address from the hardware */
hi_addr = readl(ioaddr + high);
lo_addr = readl(ioaddr + low);
/* Extract the MAC address from the high and low words */
addr[0] = lo_addr & 0xff;
addr[1] = (lo_addr >> 8) & 0xff;
addr[2] = (lo_addr >> 16) & 0xff;
addr[3] = (lo_addr >> 24) & 0xff;
addr[4] = hi_addr & 0xff;
addr[5] = (hi_addr >> 8) & 0xff;
return;
}
struct stmmac_ops {
/* MAC core initialization */
void (*core_init) (unsigned long ioaddr) ____cacheline_aligned;
/* DMA core initialization */
int (*dma_init) (unsigned long ioaddr, int pbl, u32 dma_tx, u32 dma_rx);
/* Dump MAC registers */
void (*dump_mac_regs) (unsigned long ioaddr);
/* Dump DMA registers */
void (*dump_dma_regs) (unsigned long ioaddr);
/* Set tx/rx threshold in the csr6 register
* An invalid value enables the store-and-forward mode */
void (*dma_mode) (unsigned long ioaddr, int txmode, int rxmode);
/* To track extra statistic (if supported) */
void (*dma_diagnostic_fr) (void *data, struct stmmac_extra_stats *x,
unsigned long ioaddr);
/* RX descriptor ring initialization */
void (*init_rx_desc) (struct dma_desc *p, unsigned int ring_size,
int disable_rx_ic);
/* TX descriptor ring initialization */
void (*init_tx_desc) (struct dma_desc *p, unsigned int ring_size);
/* Invoked by the xmit function to prepare the tx descriptor */
void (*prepare_tx_desc) (struct dma_desc *p, int is_fs, int len,
int csum_flag);
/* Set/get the owner of the descriptor */
void (*set_tx_owner) (struct dma_desc *p);
int (*get_tx_owner) (struct dma_desc *p);
/* Invoked by the xmit function to close the tx descriptor */
void (*close_tx_desc) (struct dma_desc *p);
/* Clean the tx descriptor as soon as the tx irq is received */
void (*release_tx_desc) (struct dma_desc *p);
/* Clear interrupt on tx frame completion. When this bit is
* set an interrupt happens as soon as the frame is transmitted */
void (*clear_tx_ic) (struct dma_desc *p);
/* Last tx segment reports the transmit status */
int (*get_tx_ls) (struct dma_desc *p);
/* Return the transmit status looking at the TDES1 */
int (*tx_status) (void *data, struct stmmac_extra_stats *x,
struct dma_desc *p, unsigned long ioaddr);
/* Get the buffer size from the descriptor */
int (*get_tx_len) (struct dma_desc *p);
/* Handle extra events on specific interrupts hw dependent */
void (*host_irq_status) (unsigned long ioaddr);
int (*get_rx_owner) (struct dma_desc *p);
void (*set_rx_owner) (struct dma_desc *p);
/* Get the receive frame size */
int (*get_rx_frame_len) (struct dma_desc *p);
/* Return the reception status looking at the RDES1 */
int (*rx_status) (void *data, struct stmmac_extra_stats *x,
struct dma_desc *p);
/* Multicast filter setting */
void (*set_filter) (struct net_device *dev);
/* Flow control setting */
void (*flow_ctrl) (unsigned long ioaddr, unsigned int duplex,
unsigned int fc, unsigned int pause_time);
/* Set power management mode (e.g. magic frame) */
void (*pmt) (unsigned long ioaddr, unsigned long mode);
/* Set/Get Unicast MAC addresses */
void (*set_umac_addr) (unsigned long ioaddr, unsigned char *addr,
unsigned int reg_n);
void (*get_umac_addr) (unsigned long ioaddr, unsigned char *addr,
unsigned int reg_n);
};
struct mac_link {
int port;
int duplex;
int speed;
};
struct mii_regs {
unsigned int addr; /* MII Address */
unsigned int data; /* MII Data */
};
struct hw_cap {
unsigned int version; /* Core Version register (GMAC) */
unsigned int pmt; /* Power-Down mode (GMAC) */
struct mac_link link;
struct mii_regs mii;
};
struct mac_device_info {
struct hw_cap hw;
struct stmmac_ops *ops;
};
struct mac_device_info *gmac_setup(unsigned long addr);
struct mac_device_info *mac100_setup(unsigned long addr);
/*******************************************************************************
Header File to describe the DMA descriptors
Use enhanced descriptors in case of GMAC Cores.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope 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.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
struct dma_desc {
/* Receive descriptor */
union {
struct {
/* RDES0 */
u32 reserved1:1;
u32 crc_error:1;
u32 dribbling:1;
u32 mii_error:1;
u32 receive_watchdog:1;
u32 frame_type:1;
u32 collision:1;
u32 frame_too_long:1;
u32 last_descriptor:1;
u32 first_descriptor:1;
u32 multicast_frame:1;
u32 run_frame:1;
u32 length_error:1;
u32 partial_frame_error:1;
u32 descriptor_error:1;
u32 error_summary:1;
u32 frame_length:14;
u32 filtering_fail:1;
u32 own:1;
/* RDES1 */
u32 buffer1_size:11;
u32 buffer2_size:11;
u32 reserved2:2;
u32 second_address_chained:1;
u32 end_ring:1;
u32 reserved3:5;
u32 disable_ic:1;
} rx;
struct {
/* RDES0 */
u32 payload_csum_error:1;
u32 crc_error:1;
u32 dribbling:1;
u32 error_gmii:1;
u32 receive_watchdog:1;
u32 frame_type:1;
u32 late_collision:1;
u32 ipc_csum_error:1;
u32 last_descriptor:1;
u32 first_descriptor:1;
u32 vlan_tag:1;
u32 overflow_error:1;
u32 length_error:1;
u32 sa_filter_fail:1;
u32 descriptor_error:1;
u32 error_summary:1;
u32 frame_length:14;
u32 da_filter_fail:1;
u32 own:1;
/* RDES1 */
u32 buffer1_size:13;
u32 reserved1:1;
u32 second_address_chained:1;
u32 end_ring:1;
u32 buffer2_size:13;
u32 reserved2:2;
u32 disable_ic:1;
} erx; /* -- enhanced -- */
/* Transmit descriptor */
struct {
/* TDES0 */
u32 deferred:1;
u32 underflow_error:1;
u32 excessive_deferral:1;
u32 collision_count:4;
u32 heartbeat_fail:1;
u32 excessive_collisions:1;
u32 late_collision:1;
u32 no_carrier:1;
u32 loss_carrier:1;
u32 reserved1:3;
u32 error_summary:1;
u32 reserved2:15;
u32 own:1;
/* TDES1 */
u32 buffer1_size:11;
u32 buffer2_size:11;
u32 reserved3:1;
u32 disable_padding:1;
u32 second_address_chained:1;
u32 end_ring:1;
u32 crc_disable:1;
u32 reserved4:2;
u32 first_segment:1;
u32 last_segment:1;
u32 interrupt:1;
} tx;
struct {
/* TDES0 */
u32 deferred:1;
u32 underflow_error:1;
u32 excessive_deferral:1;
u32 collision_count:4;
u32 vlan_frame:1;
u32 excessive_collisions:1;
u32 late_collision:1;
u32 no_carrier:1;
u32 loss_carrier:1;
u32 payload_error:1;
u32 frame_flushed:1;
u32 jabber_timeout:1;
u32 error_summary:1;
u32 ip_header_error:1;
u32 time_stamp_status:1;
u32 reserved1:2;
u32 second_address_chained:1;
u32 end_ring:1;
u32 checksum_insertion:2;
u32 reserved2:1;
u32 time_stamp_enable:1;
u32 disable_padding:1;
u32 crc_disable:1;
u32 first_segment:1;
u32 last_segment:1;
u32 interrupt:1;
u32 own:1;
/* TDES1 */
u32 buffer1_size:13;
u32 reserved3:3;
u32 buffer2_size:13;
u32 reserved4:3;
} etx; /* -- enhanced -- */
} des01;
unsigned int des2;
unsigned int des3;
};
/* Transmit checksum insertion control */
enum tdes_csum_insertion {
cic_disabled = 0, /* Checksum Insertion Control */
cic_only_ip = 1, /* Only IP header */
cic_no_pseudoheader = 2, /* IP header but pseudoheader
* is not calculated */
cic_full = 3, /* IP header and pseudoheader */
};
/*******************************************************************************
This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
DWC Ether MAC 10/100/1000 Universal version 3.41a has been used for
developing this code.
Copyright (C) 2007-2009 STMicroelectronics Ltd
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope 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.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
#include <linux/netdevice.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include "stmmac.h"
#include "gmac.h"
#undef GMAC_DEBUG
/*#define GMAC_DEBUG*/
#undef FRAME_FILTER_DEBUG
/*#define FRAME_FILTER_DEBUG*/
#ifdef GMAC_DEBUG
#define DBG(fmt, args...) printk(fmt, ## args)
#else
#define DBG(fmt, args...) do { } while (0)
#endif
static void gmac_dump_regs(unsigned long ioaddr)
{
int i;
pr_info("\t----------------------------------------------\n"
"\t GMAC registers (base addr = 0x%8x)\n"
"\t----------------------------------------------\n",
(unsigned int)ioaddr);
for (i = 0; i < 55; i++) {