You've already forked linux-apfs
mirror of
https://github.com/linux-apfs/linux-apfs.git
synced 2026-05-01 15:00:59 -07:00
ethernet/arc/arc_emac - Add new driver
Driver for non-standard on-chip ethernet device ARC EMAC 10/100, instantiated in some legacy ARC (Synopsys) FPGA Boards such as ARCAngel4/ML50x. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Francois Romieu <romieu@fr.zoreil.com> Cc: Joe Perches <joe@perches.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Mischa Jonker <mjonker@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-kernel@vger.kernel.org Cc: devicetree-discuss@lists.ozlabs.org Cc: Florian Fainelli <florian@openwrt.org> Cc: David Laight <david.laight@aculab.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Brodkin
committed by
David S. Miller
David S. Miller
parent
62208f1245
commit
e4f2379db6
@@ -0,0 +1,38 @@
|
||||
* Synopsys ARC EMAC 10/100 Ethernet driver (EMAC)
|
||||
|
||||
Required properties:
|
||||
- compatible: Should be "snps,arc-emac"
|
||||
- reg: Address and length of the register set for the device
|
||||
- interrupts: Should contain the EMAC interrupts
|
||||
- clock-frequency: CPU frequency. It is needed to calculate and set polling
|
||||
period of EMAC.
|
||||
- max-speed: Maximum supported data-rate in Mbit/s. In some HW configurations
|
||||
bandwidth of external memory controller might be a limiting factor. That's why
|
||||
it's required to specify which data-rate is supported on current SoC or FPGA.
|
||||
For example if only 10 Mbit/s is supported (10BASE-T) set "10". If 100 Mbit/s is
|
||||
supported (100BASE-TX) set "100".
|
||||
- phy: PHY device attached to the EMAC via MDIO bus
|
||||
|
||||
Child nodes of the driver are the individual PHY devices connected to the
|
||||
MDIO bus. They must have a "reg" property given the PHY address on the MDIO bus.
|
||||
|
||||
Optional properties:
|
||||
- mac-address: 6 bytes, mac address
|
||||
|
||||
Examples:
|
||||
|
||||
ethernet@c0fc2000 {
|
||||
compatible = "snps,arc-emac";
|
||||
reg = <0xc0fc2000 0x3c>;
|
||||
interrupts = <6>;
|
||||
mac-address = [ 00 11 22 33 44 55 ];
|
||||
clock-frequency = <80000000>;
|
||||
max-speed = <100>;
|
||||
phy = <&phy0>;
|
||||
|
||||
#address-cells = <1>;
|
||||
#size-cells = <0>;
|
||||
phy0: ethernet-phy@0 {
|
||||
reg = <1>;
|
||||
};
|
||||
};
|
||||
@@ -24,6 +24,7 @@ source "drivers/net/ethernet/allwinner/Kconfig"
|
||||
source "drivers/net/ethernet/alteon/Kconfig"
|
||||
source "drivers/net/ethernet/amd/Kconfig"
|
||||
source "drivers/net/ethernet/apple/Kconfig"
|
||||
source "drivers/net/ethernet/arc/Kconfig"
|
||||
source "drivers/net/ethernet/atheros/Kconfig"
|
||||
source "drivers/net/ethernet/cadence/Kconfig"
|
||||
source "drivers/net/ethernet/adi/Kconfig"
|
||||
|
||||
@@ -10,6 +10,7 @@ obj-$(CONFIG_NET_VENDOR_ALLWINNER) += allwinner/
|
||||
obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/
|
||||
obj-$(CONFIG_NET_VENDOR_AMD) += amd/
|
||||
obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
|
||||
obj-$(CONFIG_NET_VENDOR_ARC) += arc/
|
||||
obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
|
||||
obj-$(CONFIG_NET_CADENCE) += cadence/
|
||||
obj-$(CONFIG_NET_BFIN) += adi/
|
||||
|
||||
@@ -0,0 +1,31 @@
|
||||
#
|
||||
# ARC EMAC network device configuration
|
||||
#
|
||||
|
||||
config NET_VENDOR_ARC
|
||||
bool "ARC devices"
|
||||
default y
|
||||
---help---
|
||||
If you have a network (Ethernet) card belonging to this class, say Y
|
||||
and read the Ethernet-HOWTO, available from
|
||||
<http://www.tldp.org/docs.html#howto>.
|
||||
|
||||
Note that the answer to this question doesn't directly affect the
|
||||
kernel: saying N will just cause the configurator to skip all
|
||||
the questions about ARC cards. If you say Y, you will be asked for
|
||||
your specific card in the following questions.
|
||||
|
||||
if NET_VENDOR_ARC
|
||||
|
||||
config ARC_EMAC
|
||||
tristate "ARC EMAC support"
|
||||
select MII
|
||||
select PHYLIB
|
||||
depends on OF_IRQ
|
||||
depends on OF_NET
|
||||
---help---
|
||||
On some legacy ARC (Synopsys) FPGA boards such as ARCAngel4/ML50x
|
||||
non-standard on-chip ethernet device ARC EMAC 10/100 is used.
|
||||
Say Y here if you have such a board. If unsure, say N.
|
||||
|
||||
endif # NET_VENDOR_ARC
|
||||
@@ -0,0 +1,6 @@
|
||||
#
|
||||
# Makefile for the ARC network device drivers.
|
||||
#
|
||||
|
||||
arc_emac-objs := emac_main.o emac_mdio.o
|
||||
obj-$(CONFIG_ARC_EMAC) += arc_emac.o
|
||||
@@ -0,0 +1,214 @@
|
||||
/*
|
||||
* Copyright (C) 2004-2013 Synopsys, Inc. (www.synopsys.com)
|
||||
*
|
||||
* Registers and bits definitions of ARC EMAC
|
||||
*/
|
||||
|
||||
#ifndef ARC_EMAC_H
|
||||
#define ARC_EMAC_H
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/phy.h>
|
||||
|
||||
/* STATUS and ENABLE Register bit masks */
|
||||
#define TXINT_MASK (1<<0) /* Transmit interrupt */
|
||||
#define RXINT_MASK (1<<1) /* Receive interrupt */
|
||||
#define ERR_MASK (1<<2) /* Error interrupt */
|
||||
#define TXCH_MASK (1<<3) /* Transmit chaining error interrupt */
|
||||
#define MSER_MASK (1<<4) /* Missed packet counter error */
|
||||
#define RXCR_MASK (1<<8) /* RXCRCERR counter rolled over */
|
||||
#define RXFR_MASK (1<<9) /* RXFRAMEERR counter rolled over */
|
||||
#define RXFL_MASK (1<<10) /* RXOFLOWERR counter rolled over */
|
||||
#define MDIO_MASK (1<<12) /* MDIO complete interrupt */
|
||||
#define TXPL_MASK (1<<31) /* Force polling of BD by EMAC */
|
||||
|
||||
/* CONTROL Register bit masks */
|
||||
#define EN_MASK (1<<0) /* VMAC enable */
|
||||
#define TXRN_MASK (1<<3) /* TX enable */
|
||||
#define RXRN_MASK (1<<4) /* RX enable */
|
||||
#define DSBC_MASK (1<<8) /* Disable receive broadcast */
|
||||
#define ENFL_MASK (1<<10) /* Enable Full-duplex */
|
||||
#define PROM_MASK (1<<11) /* Promiscuous mode */
|
||||
|
||||
/* Buffer descriptor INFO bit masks */
|
||||
#define OWN_MASK (1<<31) /* 0-CPU owns buffer, 1-EMAC owns buffer */
|
||||
#define FIRST_MASK (1<<16) /* First buffer in chain */
|
||||
#define LAST_MASK (1<<17) /* Last buffer in chain */
|
||||
#define LEN_MASK 0x000007FF /* last 11 bits */
|
||||
#define CRLS (1<<21)
|
||||
#define DEFR (1<<22)
|
||||
#define DROP (1<<23)
|
||||
#define RTRY (1<<24)
|
||||
#define LTCL (1<<28)
|
||||
#define UFLO (1<<29)
|
||||
|
||||
#define FOR_EMAC OWN_MASK
|
||||
#define FOR_CPU 0
|
||||
|
||||
/* ARC EMAC register set combines entries for MAC and MDIO */
|
||||
enum {
|
||||
R_ID = 0,
|
||||
R_STATUS,
|
||||
R_ENABLE,
|
||||
R_CTRL,
|
||||
R_POLLRATE,
|
||||
R_RXERR,
|
||||
R_MISS,
|
||||
R_TX_RING,
|
||||
R_RX_RING,
|
||||
R_ADDRL,
|
||||
R_ADDRH,
|
||||
R_LAFL,
|
||||
R_LAFH,
|
||||
R_MDIO,
|
||||
};
|
||||
|
||||
#define TX_TIMEOUT (400*HZ/1000) /* Transmission timeout */
|
||||
|
||||
#define ARC_EMAC_NAPI_WEIGHT 40 /* Workload for NAPI */
|
||||
|
||||
#define EMAC_BUFFER_SIZE 1536 /* EMAC buffer size */
|
||||
|
||||
/**
|
||||
* struct arc_emac_bd - EMAC buffer descriptor (BD).
|
||||
*
|
||||
* @info: Contains status information on the buffer itself.
|
||||
* @data: 32-bit byte addressable pointer to the packet data.
|
||||
*/
|
||||
struct arc_emac_bd {
|
||||
__le32 info;
|
||||
dma_addr_t data;
|
||||
};
|
||||
|
||||
/* Number of Rx/Tx BD's */
|
||||
#define RX_BD_NUM 128
|
||||
#define TX_BD_NUM 128
|
||||
|
||||
#define RX_RING_SZ (RX_BD_NUM * sizeof(struct arc_emac_bd))
|
||||
#define TX_RING_SZ (TX_BD_NUM * sizeof(struct arc_emac_bd))
|
||||
|
||||
/**
|
||||
* struct buffer_state - Stores Rx/Tx buffer state.
|
||||
* @sk_buff: Pointer to socket buffer.
|
||||
* @addr: Start address of DMA-mapped memory region.
|
||||
* @len: Length of DMA-mapped memory region.
|
||||
*/
|
||||
struct buffer_state {
|
||||
struct sk_buff *skb;
|
||||
DEFINE_DMA_UNMAP_ADDR(addr);
|
||||
DEFINE_DMA_UNMAP_LEN(len);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct arc_emac_priv - Storage of EMAC's private information.
|
||||
* @dev: Pointer to the current device.
|
||||
* @ndev: Pointer to the current network device.
|
||||
* @phy_dev: Pointer to attached PHY device.
|
||||
* @bus: Pointer to the current MII bus.
|
||||
* @regs: Base address of EMAC memory-mapped control registers.
|
||||
* @napi: Structure for NAPI.
|
||||
* @stats: Network device statistics.
|
||||
* @rxbd: Pointer to Rx BD ring.
|
||||
* @txbd: Pointer to Tx BD ring.
|
||||
* @rxbd_dma: DMA handle for Rx BD ring.
|
||||
* @txbd_dma: DMA handle for Tx BD ring.
|
||||
* @rx_buff: Storage for Rx buffers states.
|
||||
* @tx_buff: Storage for Tx buffers states.
|
||||
* @txbd_curr: Index of Tx BD to use on the next "ndo_start_xmit".
|
||||
* @txbd_dirty: Index of Tx BD to free on the next Tx interrupt.
|
||||
* @last_rx_bd: Index of the last Rx BD we've got from EMAC.
|
||||
* @link: PHY's last seen link state.
|
||||
* @duplex: PHY's last set duplex mode.
|
||||
* @speed: PHY's last set speed.
|
||||
* @max_speed: Maximum supported by current system network data-rate.
|
||||
*/
|
||||
struct arc_emac_priv {
|
||||
/* Devices */
|
||||
struct device *dev;
|
||||
struct net_device *ndev;
|
||||
struct phy_device *phy_dev;
|
||||
struct mii_bus *bus;
|
||||
|
||||
void __iomem *regs;
|
||||
|
||||
struct napi_struct napi;
|
||||
struct net_device_stats stats;
|
||||
|
||||
struct arc_emac_bd *rxbd;
|
||||
struct arc_emac_bd *txbd;
|
||||
|
||||
dma_addr_t rxbd_dma;
|
||||
dma_addr_t txbd_dma;
|
||||
|
||||
struct buffer_state rx_buff[RX_BD_NUM];
|
||||
struct buffer_state tx_buff[TX_BD_NUM];
|
||||
unsigned int txbd_curr;
|
||||
unsigned int txbd_dirty;
|
||||
|
||||
unsigned int last_rx_bd;
|
||||
|
||||
unsigned int link;
|
||||
unsigned int duplex;
|
||||
unsigned int speed;
|
||||
unsigned int max_speed;
|
||||
};
|
||||
|
||||
/**
|
||||
* arc_reg_set - Sets EMAC register with provided value.
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
* @reg: Register offset from base address.
|
||||
* @value: Value to set in register.
|
||||
*/
|
||||
static inline void arc_reg_set(struct arc_emac_priv *priv, int reg, int value)
|
||||
{
|
||||
iowrite32(value, priv->regs + reg * sizeof(int));
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_reg_get - Gets value of specified EMAC register.
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
* @reg: Register offset from base address.
|
||||
*
|
||||
* returns: Value of requested register.
|
||||
*/
|
||||
static inline unsigned int arc_reg_get(struct arc_emac_priv *priv, int reg)
|
||||
{
|
||||
return ioread32(priv->regs + reg * sizeof(int));
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_reg_or - Applies mask to specified EMAC register - ("reg" | "mask").
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
* @reg: Register offset from base address.
|
||||
* @mask: Mask to apply to specified register.
|
||||
*
|
||||
* This function reads initial register value, then applies provided mask
|
||||
* to it and then writes register back.
|
||||
*/
|
||||
static inline void arc_reg_or(struct arc_emac_priv *priv, int reg, int mask)
|
||||
{
|
||||
unsigned int value = arc_reg_get(priv, reg);
|
||||
arc_reg_set(priv, reg, value | mask);
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_reg_clr - Applies mask to specified EMAC register - ("reg" & ~"mask").
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
* @reg: Register offset from base address.
|
||||
* @mask: Mask to apply to specified register.
|
||||
*
|
||||
* This function reads initial register value, then applies provided mask
|
||||
* to it and then writes register back.
|
||||
*/
|
||||
static inline void arc_reg_clr(struct arc_emac_priv *priv, int reg, int mask)
|
||||
{
|
||||
unsigned int value = arc_reg_get(priv, reg);
|
||||
arc_reg_set(priv, reg, value & ~mask);
|
||||
}
|
||||
|
||||
int arc_mdio_probe(struct platform_device *pdev, struct arc_emac_priv *priv);
|
||||
int arc_mdio_remove(struct arc_emac_priv *priv);
|
||||
|
||||
#endif /* ARC_EMAC_H */
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,152 @@
|
||||
/*
|
||||
* Copyright (C) 2004-2013 Synopsys, Inc. (www.synopsys.com)
|
||||
*
|
||||
* MDIO implementation for ARC EMAC
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/of_mdio.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include "emac.h"
|
||||
|
||||
/* Number of seconds we wait for "MDIO complete" flag to appear */
|
||||
#define ARC_MDIO_COMPLETE_POLL_COUNT 1
|
||||
|
||||
/**
|
||||
* arc_mdio_complete_wait - Waits until MDIO transaction is completed.
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
*
|
||||
* returns: 0 on success, -ETIMEDOUT on a timeout.
|
||||
*/
|
||||
static int arc_mdio_complete_wait(struct arc_emac_priv *priv)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < ARC_MDIO_COMPLETE_POLL_COUNT * 40; i++) {
|
||||
unsigned int status = arc_reg_get(priv, R_STATUS);
|
||||
|
||||
status &= MDIO_MASK;
|
||||
|
||||
if (status) {
|
||||
/* Reset "MDIO complete" flag */
|
||||
arc_reg_set(priv, R_STATUS, status);
|
||||
return 0;
|
||||
}
|
||||
|
||||
msleep(25);
|
||||
}
|
||||
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_mdio_read - MDIO interface read function.
|
||||
* @bus: Pointer to MII bus structure.
|
||||
* @phy_addr: Address of the PHY device.
|
||||
* @reg_num: PHY register to read.
|
||||
*
|
||||
* returns: The register contents on success, -ETIMEDOUT on a timeout.
|
||||
*
|
||||
* Reads the contents of the requested register from the requested PHY
|
||||
* address.
|
||||
*/
|
||||
static int arc_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
|
||||
{
|
||||
struct arc_emac_priv *priv = bus->priv;
|
||||
unsigned int value;
|
||||
int error;
|
||||
|
||||
arc_reg_set(priv, R_MDIO,
|
||||
0x60020000 | (phy_addr << 23) | (reg_num << 18));
|
||||
|
||||
error = arc_mdio_complete_wait(priv);
|
||||
if (error < 0)
|
||||
return error;
|
||||
|
||||
value = arc_reg_get(priv, R_MDIO) & 0xffff;
|
||||
|
||||
dev_dbg(priv->dev, "arc_mdio_read(phy_addr=%i, reg_num=%x) = %x\n",
|
||||
phy_addr, reg_num, value);
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_mdio_write - MDIO interface write function.
|
||||
* @bus: Pointer to MII bus structure.
|
||||
* @phy_addr: Address of the PHY device.
|
||||
* @reg_num: PHY register to write to.
|
||||
* @value: Value to be written into the register.
|
||||
*
|
||||
* returns: 0 on success, -ETIMEDOUT on a timeout.
|
||||
*
|
||||
* Writes the value to the requested register.
|
||||
*/
|
||||
static int arc_mdio_write(struct mii_bus *bus, int phy_addr,
|
||||
int reg_num, u16 value)
|
||||
{
|
||||
struct arc_emac_priv *priv = bus->priv;
|
||||
|
||||
dev_dbg(priv->dev,
|
||||
"arc_mdio_write(phy_addr=%i, reg_num=%x, value=%x)\n",
|
||||
phy_addr, reg_num, value);
|
||||
|
||||
arc_reg_set(priv, R_MDIO,
|
||||
0x50020000 | (phy_addr << 23) | (reg_num << 18) | value);
|
||||
|
||||
return arc_mdio_complete_wait(priv);
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_mdio_probe - MDIO probe function.
|
||||
* @pdev: Pointer to platform device.
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
*
|
||||
* returns: 0 on success, -ENOMEM when mdiobus_alloc
|
||||
* (to allocate memory for MII bus structure) fails.
|
||||
*
|
||||
* Sets up and registers the MDIO interface.
|
||||
*/
|
||||
int arc_mdio_probe(struct platform_device *pdev, struct arc_emac_priv *priv)
|
||||
{
|
||||
struct mii_bus *bus;
|
||||
int error;
|
||||
|
||||
bus = mdiobus_alloc();
|
||||
if (!bus)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->bus = bus;
|
||||
bus->priv = priv;
|
||||
bus->parent = priv->dev;
|
||||
bus->name = "Synopsys MII Bus",
|
||||
bus->read = &arc_mdio_read;
|
||||
bus->write = &arc_mdio_write;
|
||||
|
||||
snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
|
||||
|
||||
error = of_mdiobus_register(bus, pdev->dev.of_node);
|
||||
if (error) {
|
||||
dev_err(priv->dev, "cannot register MDIO bus %s\n", bus->name);
|
||||
mdiobus_free(bus);
|
||||
return error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* arc_mdio_remove - MDIO remove function.
|
||||
* @priv: Pointer to ARC EMAC private data structure.
|
||||
*
|
||||
* Unregisters the MDIO and frees any associate memory for MII bus.
|
||||
*/
|
||||
int arc_mdio_remove(struct arc_emac_priv *priv)
|
||||
{
|
||||
mdiobus_unregister(priv->bus);
|
||||
mdiobus_free(priv->bus);
|
||||
priv->bus = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user