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u-boot/drivers/net/calxedaxgmac.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

543 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010-2011 Calxeda, Inc.
*/
#include <common.h>
#include <malloc.h>
#include <linux/compiler.h>
#include <linux/err.h>
#include <asm/io.h>
#define TX_NUM_DESC 1
#define RX_NUM_DESC 32
#define MAC_TIMEOUT (5*CONFIG_SYS_HZ)
#define ETH_BUF_SZ 2048
#define TX_BUF_SZ (ETH_BUF_SZ * TX_NUM_DESC)
#define RX_BUF_SZ (ETH_BUF_SZ * RX_NUM_DESC)
#define RXSTART 0x00000002
#define TXSTART 0x00002000
#define RXENABLE 0x00000004
#define TXENABLE 0x00000008
#define XGMAC_CONTROL_SPD 0x40000000
#define XGMAC_CONTROL_SPD_MASK 0x60000000
#define XGMAC_CONTROL_SARC 0x10000000
#define XGMAC_CONTROL_SARK_MASK 0x18000000
#define XGMAC_CONTROL_CAR 0x04000000
#define XGMAC_CONTROL_CAR_MASK 0x06000000
#define XGMAC_CONTROL_CAR_SHIFT 25
#define XGMAC_CONTROL_DP 0x01000000
#define XGMAC_CONTROL_WD 0x00800000
#define XGMAC_CONTROL_JD 0x00400000
#define XGMAC_CONTROL_JE 0x00100000
#define XGMAC_CONTROL_LM 0x00001000
#define XGMAC_CONTROL_IPC 0x00000400
#define XGMAC_CONTROL_ACS 0x00000080
#define XGMAC_CONTROL_DDIC 0x00000010
#define XGMAC_CONTROL_TE 0x00000008
#define XGMAC_CONTROL_RE 0x00000004
#define XGMAC_DMA_BUSMODE_RESET 0x00000001
#define XGMAC_DMA_BUSMODE_DSL 0x00000004
#define XGMAC_DMA_BUSMODE_DSL_MASK 0x0000007c
#define XGMAC_DMA_BUSMODE_DSL_SHIFT 2
#define XGMAC_DMA_BUSMODE_ATDS 0x00000080
#define XGMAC_DMA_BUSMODE_PBL_MASK 0x00003f00
#define XGMAC_DMA_BUSMODE_PBL_SHIFT 8
#define XGMAC_DMA_BUSMODE_FB 0x00010000
#define XGMAC_DMA_BUSMODE_USP 0x00800000
#define XGMAC_DMA_BUSMODE_8PBL 0x01000000
#define XGMAC_DMA_BUSMODE_AAL 0x02000000
#define XGMAC_DMA_AXIMODE_ENLPI 0x80000000
#define XGMAC_DMA_AXIMODE_MGK 0x40000000
#define XGMAC_DMA_AXIMODE_WROSR 0x00100000
#define XGMAC_DMA_AXIMODE_WROSR_MASK 0x00F00000
#define XGMAC_DMA_AXIMODE_WROSR_SHIFT 20
#define XGMAC_DMA_AXIMODE_RDOSR 0x00010000
#define XGMAC_DMA_AXIMODE_RDOSR_MASK 0x000F0000
#define XGMAC_DMA_AXIMODE_RDOSR_SHIFT 16
#define XGMAC_DMA_AXIMODE_AAL 0x00001000
#define XGMAC_DMA_AXIMODE_BLEN256 0x00000080
#define XGMAC_DMA_AXIMODE_BLEN128 0x00000040
#define XGMAC_DMA_AXIMODE_BLEN64 0x00000020
#define XGMAC_DMA_AXIMODE_BLEN32 0x00000010
#define XGMAC_DMA_AXIMODE_BLEN16 0x00000008
#define XGMAC_DMA_AXIMODE_BLEN8 0x00000004
#define XGMAC_DMA_AXIMODE_BLEN4 0x00000002
#define XGMAC_DMA_AXIMODE_UNDEF 0x00000001
#define XGMAC_CORE_OMR_RTC_SHIFT 3
#define XGMAC_CORE_OMR_RTC_MASK 0x00000018
#define XGMAC_CORE_OMR_RTC 0x00000010
#define XGMAC_CORE_OMR_RSF 0x00000020
#define XGMAC_CORE_OMR_DT 0x00000040
#define XGMAC_CORE_OMR_FEF 0x00000080
#define XGMAC_CORE_OMR_EFC 0x00000100
#define XGMAC_CORE_OMR_RFA_SHIFT 9
#define XGMAC_CORE_OMR_RFA_MASK 0x00000E00
#define XGMAC_CORE_OMR_RFD_SHIFT 12
#define XGMAC_CORE_OMR_RFD_MASK 0x00007000
#define XGMAC_CORE_OMR_TTC_SHIFT 16
#define XGMAC_CORE_OMR_TTC_MASK 0x00030000
#define XGMAC_CORE_OMR_TTC 0x00020000
#define XGMAC_CORE_OMR_FTF 0x00100000
#define XGMAC_CORE_OMR_TSF 0x00200000
#define FIFO_MINUS_1K 0x0
#define FIFO_MINUS_2K 0x1
#define FIFO_MINUS_3K 0x2
#define FIFO_MINUS_4K 0x3
#define FIFO_MINUS_6K 0x4
#define FIFO_MINUS_8K 0x5
#define FIFO_MINUS_12K 0x6
#define FIFO_MINUS_16K 0x7
#define XGMAC_CORE_FLOW_PT_SHIFT 16
#define XGMAC_CORE_FLOW_PT_MASK 0xFFFF0000
#define XGMAC_CORE_FLOW_PT 0x00010000
#define XGMAC_CORE_FLOW_DZQP 0x00000080
#define XGMAC_CORE_FLOW_PLT_SHIFT 4
#define XGMAC_CORE_FLOW_PLT_MASK 0x00000030
#define XGMAC_CORE_FLOW_PLT 0x00000010
#define XGMAC_CORE_FLOW_UP 0x00000008
#define XGMAC_CORE_FLOW_RFE 0x00000004
#define XGMAC_CORE_FLOW_TFE 0x00000002
#define XGMAC_CORE_FLOW_FCB 0x00000001
/* XGMAC Descriptor Defines */
#define MAX_DESC_BUF_SZ (0x2000 - 8)
#define RXDESC_EXT_STATUS 0x00000001
#define RXDESC_CRC_ERR 0x00000002
#define RXDESC_RX_ERR 0x00000008
#define RXDESC_RX_WDOG 0x00000010
#define RXDESC_FRAME_TYPE 0x00000020
#define RXDESC_GIANT_FRAME 0x00000080
#define RXDESC_LAST_SEG 0x00000100
#define RXDESC_FIRST_SEG 0x00000200
#define RXDESC_VLAN_FRAME 0x00000400
#define RXDESC_OVERFLOW_ERR 0x00000800
#define RXDESC_LENGTH_ERR 0x00001000
#define RXDESC_SA_FILTER_FAIL 0x00002000
#define RXDESC_DESCRIPTOR_ERR 0x00004000
#define RXDESC_ERROR_SUMMARY 0x00008000
#define RXDESC_FRAME_LEN_OFFSET 16
#define RXDESC_FRAME_LEN_MASK 0x3fff0000
#define RXDESC_DA_FILTER_FAIL 0x40000000
#define RXDESC1_END_RING 0x00008000
#define RXDESC_IP_PAYLOAD_MASK 0x00000003
#define RXDESC_IP_PAYLOAD_UDP 0x00000001
#define RXDESC_IP_PAYLOAD_TCP 0x00000002
#define RXDESC_IP_PAYLOAD_ICMP 0x00000003
#define RXDESC_IP_HEADER_ERR 0x00000008
#define RXDESC_IP_PAYLOAD_ERR 0x00000010
#define RXDESC_IPV4_PACKET 0x00000040
#define RXDESC_IPV6_PACKET 0x00000080
#define TXDESC_UNDERFLOW_ERR 0x00000001
#define TXDESC_JABBER_TIMEOUT 0x00000002
#define TXDESC_LOCAL_FAULT 0x00000004
#define TXDESC_REMOTE_FAULT 0x00000008
#define TXDESC_VLAN_FRAME 0x00000010
#define TXDESC_FRAME_FLUSHED 0x00000020
#define TXDESC_IP_HEADER_ERR 0x00000040
#define TXDESC_PAYLOAD_CSUM_ERR 0x00000080
#define TXDESC_ERROR_SUMMARY 0x00008000
#define TXDESC_SA_CTRL_INSERT 0x00040000
#define TXDESC_SA_CTRL_REPLACE 0x00080000
#define TXDESC_2ND_ADDR_CHAINED 0x00100000
#define TXDESC_END_RING 0x00200000
#define TXDESC_CSUM_IP 0x00400000
#define TXDESC_CSUM_IP_PAYLD 0x00800000
#define TXDESC_CSUM_ALL 0x00C00000
#define TXDESC_CRC_EN_REPLACE 0x01000000
#define TXDESC_CRC_EN_APPEND 0x02000000
#define TXDESC_DISABLE_PAD 0x04000000
#define TXDESC_FIRST_SEG 0x10000000
#define TXDESC_LAST_SEG 0x20000000
#define TXDESC_INTERRUPT 0x40000000
#define DESC_OWN 0x80000000
#define DESC_BUFFER1_SZ_MASK 0x00001fff
#define DESC_BUFFER2_SZ_MASK 0x1fff0000
#define DESC_BUFFER2_SZ_OFFSET 16
struct xgmac_regs {
u32 config;
u32 framefilter;
u32 resv_1[4];
u32 flow_control;
u32 vlantag;
u32 version;
u32 vlaninclude;
u32 resv_2[2];
u32 pacestretch;
u32 vlanhash;
u32 resv_3;
u32 intreg;
struct {
u32 hi; /* 0x40 */
u32 lo; /* 0x44 */
} macaddr[16];
u32 resv_4[0xd0];
u32 core_opmode; /* 0x400 */
u32 resv_5[0x2bf];
u32 busmode; /* 0xf00 */
u32 txpoll;
u32 rxpoll;
u32 rxdesclist;
u32 txdesclist;
u32 dma_status;
u32 dma_opmode;
u32 intenable;
u32 resv_6[2];
u32 axi_mode; /* 0xf28 */
};
struct xgmac_dma_desc {
__le32 flags;
__le32 buf_size;
__le32 buf1_addr; /* Buffer 1 Address Pointer */
__le32 buf2_addr; /* Buffer 2 Address Pointer */
__le32 ext_status;
__le32 res[3];
};
/* XGMAC Descriptor Access Helpers */
static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz)
{
if (buf_sz > MAX_DESC_BUF_SZ)
p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ |
(buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET);
else
p->buf_size = cpu_to_le32(buf_sz);
}
static inline int desc_get_buf_len(struct xgmac_dma_desc *p)
{
u32 len = le32_to_cpu(p->buf_size);
return (len & DESC_BUFFER1_SZ_MASK) +
((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET);
}
static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size,
int buf_sz)
{
struct xgmac_dma_desc *end = p + ring_size - 1;
memset(p, 0, sizeof(*p) * ring_size);
for (; p <= end; p++)
desc_set_buf_len(p, buf_sz);
end->buf_size |= cpu_to_le32(RXDESC1_END_RING);
}
static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size)
{
memset(p, 0, sizeof(*p) * ring_size);
p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING);
}
static inline int desc_get_owner(struct xgmac_dma_desc *p)
{
return le32_to_cpu(p->flags) & DESC_OWN;
}
static inline void desc_set_rx_owner(struct xgmac_dma_desc *p)
{
/* Clear all fields and set the owner */
p->flags = cpu_to_le32(DESC_OWN);
}
static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags)
{
u32 tmpflags = le32_to_cpu(p->flags);
tmpflags &= TXDESC_END_RING;
tmpflags |= flags | DESC_OWN;
p->flags = cpu_to_le32(tmpflags);
}
static inline void *desc_get_buf_addr(struct xgmac_dma_desc *p)
{
return (void *)le32_to_cpu(p->buf1_addr);
}
static inline void desc_set_buf_addr(struct xgmac_dma_desc *p,
void *paddr, int len)
{
p->buf1_addr = cpu_to_le32(paddr);
if (len > MAX_DESC_BUF_SZ)
p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ);
}
static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p,
void *paddr, int len)
{
desc_set_buf_len(p, len);
desc_set_buf_addr(p, paddr, len);
}
static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p)
{
u32 data = le32_to_cpu(p->flags);
u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET;
if (data & RXDESC_FRAME_TYPE)
len -= 4;
return len;
}
struct calxeda_eth_dev {
struct xgmac_dma_desc rx_chain[RX_NUM_DESC];
struct xgmac_dma_desc tx_chain[TX_NUM_DESC];
char rxbuffer[RX_BUF_SZ];
u32 tx_currdesc;
u32 rx_currdesc;
struct eth_device *dev;
} __aligned(32);
/*
* Initialize a descriptor ring. Calxeda XGMAC is configured to use
* advanced descriptors.
*/
static void init_rx_desc(struct calxeda_eth_dev *priv)
{
struct xgmac_dma_desc *rxdesc = priv->rx_chain;
struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
void *rxbuffer = priv->rxbuffer;
int i;
desc_init_rx_desc(rxdesc, RX_NUM_DESC, ETH_BUF_SZ);
writel((ulong)rxdesc, &regs->rxdesclist);
for (i = 0; i < RX_NUM_DESC; i++) {
desc_set_buf_addr(rxdesc + i, rxbuffer + (i * ETH_BUF_SZ),
ETH_BUF_SZ);
desc_set_rx_owner(rxdesc + i);
}
}
static void init_tx_desc(struct calxeda_eth_dev *priv)
{
struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
desc_init_tx_desc(priv->tx_chain, TX_NUM_DESC);
writel((ulong)priv->tx_chain, &regs->txdesclist);
}
static int xgmac_reset(struct eth_device *dev)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
int timeout = MAC_TIMEOUT;
u32 value;
value = readl(&regs->config) & XGMAC_CONTROL_SPD_MASK;
writel(XGMAC_DMA_BUSMODE_RESET, &regs->busmode);
while ((timeout-- >= 0) &&
(readl(&regs->busmode) & XGMAC_DMA_BUSMODE_RESET))
udelay(1);
writel(value, &regs->config);
return timeout;
}
static void xgmac_hwmacaddr(struct eth_device *dev)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
u32 macaddr[2];
memcpy(macaddr, dev->enetaddr, 6);
writel(macaddr[1], &regs->macaddr[0].hi);
writel(macaddr[0], &regs->macaddr[0].lo);
}
static int xgmac_init(struct eth_device *dev, bd_t * bis)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
struct calxeda_eth_dev *priv = dev->priv;
int value;
if (xgmac_reset(dev) < 0)
return -1;
/* set the hardware MAC address */
xgmac_hwmacaddr(dev);
/* set the AXI bus modes */
value = XGMAC_DMA_BUSMODE_ATDS |
(16 << XGMAC_DMA_BUSMODE_PBL_SHIFT) |
XGMAC_DMA_BUSMODE_FB | XGMAC_DMA_BUSMODE_AAL;
writel(value, &regs->busmode);
value = XGMAC_DMA_AXIMODE_AAL | XGMAC_DMA_AXIMODE_BLEN16 |
XGMAC_DMA_AXIMODE_BLEN8 | XGMAC_DMA_AXIMODE_BLEN4;
writel(value, &regs->axi_mode);
/* set flow control parameters and store and forward mode */
value = (FIFO_MINUS_12K << XGMAC_CORE_OMR_RFD_SHIFT) |
(FIFO_MINUS_4K << XGMAC_CORE_OMR_RFA_SHIFT) |
XGMAC_CORE_OMR_EFC | XGMAC_CORE_OMR_TSF;
writel(value, &regs->core_opmode);
/* enable pause frames */
value = (1024 << XGMAC_CORE_FLOW_PT_SHIFT) |
(1 << XGMAC_CORE_FLOW_PLT_SHIFT) |
XGMAC_CORE_FLOW_UP | XGMAC_CORE_FLOW_RFE | XGMAC_CORE_FLOW_TFE;
writel(value, &regs->flow_control);
/* Initialize the descriptor chains */
init_rx_desc(priv);
init_tx_desc(priv);
/* must set to 0, or when started up will cause issues */
priv->tx_currdesc = 0;
priv->rx_currdesc = 0;
/* set default core values */
value = readl(&regs->config);
value &= XGMAC_CONTROL_SPD_MASK;
value |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_ACS |
XGMAC_CONTROL_IPC | XGMAC_CONTROL_CAR;
/* Everything is ready enable both mac and DMA */
value |= RXENABLE | TXENABLE;
writel(value, &regs->config);
value = readl(&regs->dma_opmode);
value |= RXSTART | TXSTART;
writel(value, &regs->dma_opmode);
return 0;
}
static int xgmac_tx(struct eth_device *dev, void *packet, int length)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
struct calxeda_eth_dev *priv = dev->priv;
u32 currdesc = priv->tx_currdesc;
struct xgmac_dma_desc *txdesc = &priv->tx_chain[currdesc];
int timeout;
desc_set_buf_addr_and_size(txdesc, packet, length);
desc_set_tx_owner(txdesc, TXDESC_FIRST_SEG |
TXDESC_LAST_SEG | TXDESC_CRC_EN_APPEND);
/* write poll demand */
writel(1, &regs->txpoll);
timeout = 1000000;
while (desc_get_owner(txdesc)) {
if (timeout-- < 0) {
printf("xgmac: TX timeout\n");
return -ETIMEDOUT;
}
udelay(1);
}
priv->tx_currdesc = (currdesc + 1) & (TX_NUM_DESC - 1);
return 0;
}
static int xgmac_rx(struct eth_device *dev)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
struct calxeda_eth_dev *priv = dev->priv;
u32 currdesc = priv->rx_currdesc;
struct xgmac_dma_desc *rxdesc = &priv->rx_chain[currdesc];
int length = 0;
/* check if the host has the desc */
if (desc_get_owner(rxdesc))
return -1; /* something bad happened */
length = desc_get_rx_frame_len(rxdesc);
net_process_received_packet(desc_get_buf_addr(rxdesc), length);
/* set descriptor back to owned by XGMAC */
desc_set_rx_owner(rxdesc);
writel(1, &regs->rxpoll);
priv->rx_currdesc = (currdesc + 1) & (RX_NUM_DESC - 1);
return length;
}
static void xgmac_halt(struct eth_device *dev)
{
struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
struct calxeda_eth_dev *priv = dev->priv;
int value;
/* Disable TX/RX */
value = readl(&regs->config);
value &= ~(RXENABLE | TXENABLE);
writel(value, &regs->config);
/* Disable DMA */
value = readl(&regs->dma_opmode);
value &= ~(RXSTART | TXSTART);
writel(value, &regs->dma_opmode);
/* must set to 0, or when started up will cause issues */
priv->tx_currdesc = 0;
priv->rx_currdesc = 0;
}
int calxedaxgmac_initialize(u32 id, ulong base_addr)
{
struct eth_device *dev;
struct calxeda_eth_dev *priv;
struct xgmac_regs *regs;
u32 macaddr[2];
regs = (struct xgmac_regs *)base_addr;
/* check hardware version */
if (readl(&regs->version) != 0x1012)
return -1;
dev = malloc(sizeof(*dev));
if (!dev)
return 0;
memset(dev, 0, sizeof(*dev));
/* Structure must be aligned, because it contains the descriptors */
priv = memalign(32, sizeof(*priv));
if (!priv) {
free(dev);
return 0;
}
dev->iobase = (int)base_addr;
dev->priv = priv;
priv->dev = dev;
sprintf(dev->name, "xgmac%d", id);
/* The MAC address is already configured, so read it from registers. */
macaddr[1] = readl(&regs->macaddr[0].hi);
macaddr[0] = readl(&regs->macaddr[0].lo);
memcpy(dev->enetaddr, macaddr, 6);
dev->init = xgmac_init;
dev->send = xgmac_tx;
dev->recv = xgmac_rx;
dev->halt = xgmac_halt;
eth_register(dev);
return 1;
}
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