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net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

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This adds a driver for the Aurora VLSI NB8800 Ethernet controller.
It is an almost complete rewrite of a driver originally found in
a Sigma Designs 2.6.22 tree.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Måns Rullgård 2015-11-19 13:02:59 +00:00 committed by David S. Miller
parent de92718883
commit 52dfc83012
6 changed files with 1891 additions and 0 deletions
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1
drivers/net/ethernet/Kconfig
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@ -29,6 +29,7 @@ source "drivers/net/ethernet/apm/Kconfig"
source "drivers/net/ethernet/apple/Kconfig"
source "drivers/net/ethernet/arc/Kconfig"
source "drivers/net/ethernet/atheros/Kconfig"
source "drivers/net/ethernet/aurora/Kconfig"
source "drivers/net/ethernet/cadence/Kconfig"
source "drivers/net/ethernet/adi/Kconfig"
source "drivers/net/ethernet/broadcom/Kconfig"

1
drivers/net/ethernet/Makefile
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@ -15,6 +15,7 @@ obj-$(CONFIG_NET_XGENE) += apm/
obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
obj-$(CONFIG_NET_VENDOR_ARC) += arc/
obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
obj-$(CONFIG_NET_CADENCE) += cadence/
obj-$(CONFIG_NET_BFIN) += adi/
obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/

20
drivers/net/ethernet/aurora/Kconfig Normal file
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@ -0,0 +1,20 @@
config NET_VENDOR_AURORA
bool "Aurora VLSI devices"
help
If you have a network (Ethernet) device belonging to this class,
say Y.
Note that the answer to this question doesn't directly affect the
kernel: saying N will just cause the configurator to skip all
questions about Aurora devices. If you say Y, you will be asked
for your specific device in the following questions.
if NET_VENDOR_AURORA
config AURORA_NB8800
tristate "Aurora AU-NB8800 support"
select PHYLIB
help
Support for the AU-NB8800 gigabit Ethernet controller.
endif

1
drivers/net/ethernet/aurora/Makefile Normal file
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@ -0,0 +1 @@
obj-$(CONFIG_AURORA_NB8800) += nb8800.o

1552
drivers/net/ethernet/aurora/nb8800.c Normal file
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316
drivers/net/ethernet/aurora/nb8800.h Normal file
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@ -0,0 +1,316 @@
#ifndef _NB8800_H_
#define _NB8800_H_
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/phy.h>
#include <linux/clk.h>
#include <linux/bitops.h>
#define RX_DESC_COUNT 256
#define TX_DESC_COUNT 256
#define NB8800_DESC_LOW 4
#define RX_BUF_SIZE 1552
#define RX_COPYBREAK 256
#define RX_COPYHDR 128
#define MAX_MDC_CLOCK 2500000
/* Stargate Solutions SSN8800 core registers */
#define NB8800_TX_CTL1 0x000
#define TX_TPD BIT(5)
#define TX_APPEND_FCS BIT(4)
#define TX_PAD_EN BIT(3)
#define TX_RETRY_EN BIT(2)
#define TX_EN BIT(0)
#define NB8800_TX_CTL2 0x001
#define NB8800_RX_CTL 0x004
#define RX_BC_DISABLE BIT(7)
#define RX_RUNT BIT(6)
#define RX_AF_EN BIT(5)
#define RX_PAUSE_EN BIT(3)
#define RX_SEND_CRC BIT(2)
#define RX_PAD_STRIP BIT(1)
#define RX_EN BIT(0)
#define NB8800_RANDOM_SEED 0x008
#define NB8800_TX_SDP 0x14
#define NB8800_TX_TPDP1 0x18
#define NB8800_TX_TPDP2 0x19
#define NB8800_SLOT_TIME 0x1c
#define NB8800_MDIO_CMD 0x020
#define MDIO_CMD_GO BIT(31)
#define MDIO_CMD_WR BIT(26)
#define MDIO_CMD_ADDR(x) ((x) << 21)
#define MDIO_CMD_REG(x) ((x) << 16)
#define MDIO_CMD_DATA(x) ((x) << 0)
#define NB8800_MDIO_STS 0x024
#define MDIO_STS_ERR BIT(31)
#define NB8800_MC_ADDR(i) (0x028 + (i))
#define NB8800_MC_INIT 0x02e
#define NB8800_UC_ADDR(i) (0x03c + (i))
#define NB8800_MAC_MODE 0x044
#define RGMII_MODE BIT(7)
#define HALF_DUPLEX BIT(4)
#define BURST_EN BIT(3)
#define LOOPBACK_EN BIT(2)
#define GMAC_MODE BIT(0)
#define NB8800_IC_THRESHOLD 0x050
#define NB8800_PE_THRESHOLD 0x051
#define NB8800_PF_THRESHOLD 0x052
#define NB8800_TX_BUFSIZE 0x054
#define NB8800_FIFO_CTL 0x056
#define NB8800_PQ1 0x060
#define NB8800_PQ2 0x061
#define NB8800_SRC_ADDR(i) (0x06a + (i))
#define NB8800_STAT_DATA 0x078
#define NB8800_STAT_INDEX 0x07c
#define NB8800_STAT_CLEAR 0x07d
#define NB8800_SLEEP_MODE 0x07e
#define SLEEP_MODE BIT(0)
#define NB8800_WAKEUP 0x07f
#define WAKEUP BIT(0)
/* Aurora NB8800 host interface registers */
#define NB8800_TXC_CR 0x100
#define TCR_LK BIT(12)
#define TCR_DS BIT(11)
#define TCR_BTS(x) (((x) & 0x7) << 8)
#define TCR_DIE BIT(7)
#define TCR_TFI(x) (((x) & 0x7) << 4)
#define TCR_LE BIT(3)
#define TCR_RS BIT(2)
#define TCR_DM BIT(1)
#define TCR_EN BIT(0)
#define NB8800_TXC_SR 0x104
#define TSR_DE BIT(3)
#define TSR_DI BIT(2)
#define TSR_TO BIT(1)
#define TSR_TI BIT(0)
#define NB8800_TX_SAR 0x108
#define NB8800_TX_DESC_ADDR 0x10c
#define NB8800_TX_REPORT_ADDR 0x110
#define TX_BYTES_TRANSFERRED(x) (((x) >> 16) & 0xffff)
#define TX_FIRST_DEFERRAL BIT(7)
#define TX_EARLY_COLLISIONS(x) (((x) >> 3) & 0xf)
#define TX_LATE_COLLISION BIT(2)
#define TX_PACKET_DROPPED BIT(1)
#define TX_FIFO_UNDERRUN BIT(0)
#define IS_TX_ERROR(r) ((r) & 0x07)
#define NB8800_TX_FIFO_SR 0x114
#define NB8800_TX_ITR 0x118
#define NB8800_RXC_CR 0x200
#define RCR_FL BIT(13)
#define RCR_LK BIT(12)
#define RCR_DS BIT(11)
#define RCR_BTS(x) (((x) & 7) << 8)
#define RCR_DIE BIT(7)
#define RCR_RFI(x) (((x) & 7) << 4)
#define RCR_LE BIT(3)
#define RCR_RS BIT(2)
#define RCR_DM BIT(1)
#define RCR_EN BIT(0)
#define NB8800_RXC_SR 0x204
#define RSR_DE BIT(3)
#define RSR_DI BIT(2)
#define RSR_RO BIT(1)
#define RSR_RI BIT(0)
#define NB8800_RX_SAR 0x208
#define NB8800_RX_DESC_ADDR 0x20c
#define NB8800_RX_REPORT_ADDR 0x210
#define RX_BYTES_TRANSFERRED(x) (((x) >> 16) & 0xFFFF)
#define RX_MULTICAST_PKT BIT(9)
#define RX_BROADCAST_PKT BIT(8)
#define RX_LENGTH_ERR BIT(7)
#define RX_FCS_ERR BIT(6)
#define RX_RUNT_PKT BIT(5)
#define RX_FIFO_OVERRUN BIT(4)
#define RX_LATE_COLLISION BIT(3)
#define RX_ALIGNMENT_ERROR BIT(2)
#define RX_ERROR_MASK 0xfc
#define IS_RX_ERROR(r) ((r) & RX_ERROR_MASK)
#define NB8800_RX_FIFO_SR 0x214
#define NB8800_RX_ITR 0x218
/* Sigma Designs SMP86xx additional registers */
#define NB8800_TANGOX_PAD_MODE 0x400
#define PAD_MODE_MASK 0x7
#define PAD_MODE_MII 0x0
#define PAD_MODE_RGMII 0x1
#define PAD_MODE_GTX_CLK_INV BIT(3)
#define PAD_MODE_GTX_CLK_DELAY BIT(4)
#define NB8800_TANGOX_MDIO_CLKDIV 0x420
#define NB8800_TANGOX_RESET 0x424
/* Hardware DMA descriptor */
struct nb8800_dma_desc {
u32 s_addr; /* start address */
u32 n_addr; /* next descriptor address */
u32 r_addr; /* report address */
u32 config;
} __aligned(8);
#define DESC_ID BIT(23)
#define DESC_EOC BIT(22)
#define DESC_EOF BIT(21)
#define DESC_LK BIT(20)
#define DESC_DS BIT(19)
#define DESC_BTS(x) (((x) & 0x7) << 16)
/* DMA descriptor and associated data for rx.
* Allocated from coherent memory.
*/
struct nb8800_rx_desc {
/* DMA descriptor */
struct nb8800_dma_desc desc;
/* Status report filled in by hardware */
u32 report;
};
/* Address of buffer on rx ring */
struct nb8800_rx_buf {
struct page *page;
unsigned long offset;
};
/* DMA descriptors and associated data for tx.
* Allocated from coherent memory.
*/
struct nb8800_tx_desc {
/* DMA descriptor. The second descriptor is used if packet
* data is unaligned.
*/
struct nb8800_dma_desc desc[2];
/* Status report filled in by hardware */
u32 report;
/* Bounce buffer for initial unaligned part of packet */
u8 buf[8] __aligned(8);
};
/* Packet in tx queue */
struct nb8800_tx_buf {
/* Currently queued skb */
struct sk_buff *skb;
/* DMA address of the first descriptor */
dma_addr_t dma_desc;
/* DMA address of packet data */
dma_addr_t dma_addr;
/* Length of DMA mapping, less than skb->len if alignment
* buffer is used.
*/
unsigned int dma_len;
/* Number of packets in chain starting here */
unsigned int chain_len;
/* Packet chain ready to be submitted to hardware */
bool ready;
};
struct nb8800_priv {
struct napi_struct napi;
void __iomem *base;
/* RX DMA descriptors */
struct nb8800_rx_desc *rx_descs;
/* RX buffers referenced by DMA descriptors */
struct nb8800_rx_buf *rx_bufs;
/* Current end of chain */
u32 rx_eoc;
/* Value for rx interrupt time register in NAPI interrupt mode */
u32 rx_itr_irq;
/* Value for rx interrupt time register in NAPI poll mode */
u32 rx_itr_poll;
/* Value for config field of rx DMA descriptors */
u32 rx_dma_config;
/* TX DMA descriptors */
struct nb8800_tx_desc *tx_descs;
/* TX packet queue */
struct nb8800_tx_buf *tx_bufs;
/* Number of free tx queue entries */
atomic_t tx_free;
/* First free tx queue entry */
u32 tx_next;
/* Next buffer to transmit */
u32 tx_queue;
/* Start of current packet chain */
struct nb8800_tx_buf *tx_chain;
/* Next buffer to reclaim */
u32 tx_done;
/* Lock for DMA activation */
spinlock_t tx_lock;
struct mii_bus *mii_bus;
struct device_node *phy_node;
struct phy_device *phydev;
/* PHY connection type from DT */
int phy_mode;
/* Current link status */
int speed;
int duplex;
int link;
/* Pause settings */
bool pause_aneg;
bool pause_rx;
bool pause_tx;
/* DMA base address of rx descriptors, see rx_descs above */
dma_addr_t rx_desc_dma;
/* DMA base address of tx descriptors, see tx_descs above */
dma_addr_t tx_desc_dma;
struct clk *clk;
};
struct nb8800_ops {
int (*init)(struct net_device *dev);
int (*reset)(struct net_device *dev);
};
#endif /* _NB8800_H_ */