// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Based on Linux airoha_eth.c majorly rewritten
* and simplified for U-Boot usage for single TX/RX ring.
*
* Copyright (c) 2024 AIROHA Inc
* Author: Lorenzo Bianconi <lorenzo@kernel.org>
* Christian Marangi <ansuelsmth@gmail.org>
*/
#include <dm.h>
#include <dm/devres.h>
#include <dm/lists.h>
#include <mapmem.h>
#include <net.h>
#include <regmap.h>
#include <reset.h>
#include <syscon.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/time.h>
#include <asm/arch/scu-regmap.h>
#define AIROHA_MAX_NUM_GDM_PORTS 1
#define AIROHA_MAX_NUM_QDMA 1
#define AIROHA_MAX_NUM_RSTS 3
#define AIROHA_MAX_NUM_XSI_RSTS 4
#define AIROHA_MAX_PACKET_SIZE 2048
#define AIROHA_NUM_TX_RING 1
#define AIROHA_NUM_RX_RING 1
#define AIROHA_NUM_TX_IRQ 1
#define HW_DSCP_NUM 32
#define IRQ_QUEUE_LEN 1
#define TX_DSCP_NUM 16
#define RX_DSCP_NUM PKTBUFSRX
/* SCU */
#define SCU_SHARE_FEMEM_SEL 0x958
/* SWITCH */
#define SWITCH_MFC 0x10
#define SWITCH_BC_FFP GENMASK(31, 24)
#define SWITCH_UNM_FFP GENMASK(23, 16)
#define SWITCH_UNU_FFP GENMASK(15, 8)
#define SWITCH_PMCR(_n) 0x3000 + ((_n) * 0x100)
#define SWITCH_IPG_CFG GENMASK(19, 18)
#define SWITCH_IPG_CFG_NORMAL FIELD_PREP(SWITCH_IPG_CFG, 0x0)
#define SWITCH_IPG_CFG_SHORT FIELD_PREP(SWITCH_IPG_CFG, 0x1)
#define SWITCH_IPG_CFG_SHRINK FIELD_PREP(SWITCH_IPG_CFG, 0x2)
#define SWITCH_MAC_MODE BIT(16)
#define SWITCH_FORCE_MODE BIT(15)
#define SWITCH_MAC_TX_EN BIT(14)
#define SWITCH_MAC_RX_EN BIT(13)
#define SWITCH_BKOFF_EN BIT(9)
#define SWITCH_BKPR_EN BIT(8)
#define SWITCH_FORCE_RX_FC BIT(5)
#define SWITCH_FORCE_TX_FC BIT(4)
#define SWITCH_FORCE_SPD GENMASK(3, 2)
#define SWITCH_FORCE_SPD_10 FIELD_PREP(SWITCH_FORCE_SPD, 0x0)
#define SWITCH_FORCE_SPD_100 FIELD_PREP(SWITCH_FORCE_SPD, 0x1)
#define SWITCH_FORCE_SPD_1000 FIELD_PREP(SWITCH_FORCE_SPD, 0x2)
#define SWITCH_FORCE_DPX BIT(1)
#define SWITCH_FORCE_LNK BIT(0)
#define SWITCH_SMACCR0 0x30e4
#define SMACCR0_MAC2 GENMASK(31, 24)
#define SMACCR0_MAC3 GENMASK(23, 16)
#define SMACCR0_MAC4 GENMASK(15, 8)
#define SMACCR0_MAC5 GENMASK(7, 0)
#define SWITCH_SMACCR1 0x30e8
#define SMACCR1_MAC0 GENMASK(15, 8)
#define SMACCR1_MAC1 GENMASK(7, 0)
#define SWITCH_PHY_POLL 0x7018
#define SWITCH_PHY_AP_EN GENMASK(30, 24)
#define SWITCH_EEE_POLL_EN GENMASK(22, 16)
#define SWITCH_PHY_PRE_EN BIT(15)
#define SWITCH_PHY_END_ADDR GENMASK(12, 8)
#define SWITCH_PHY_ST_ADDR GENMASK(4, 0)
/* FE */
#define PSE_BASE 0x0100
#define CSR_IFC_BASE 0x0200
#define CDM1_BASE 0x0400
#define GDM1_BASE 0x0500
#define PPE1_BASE 0x0c00
#define CDM2_BASE 0x1400
#define GDM2_BASE 0x1500
#define GDM3_BASE 0x1100
#define GDM4_BASE 0x2500
#define GDM_BASE(_n) \
((_n) == 4 ? GDM4_BASE : \
(_n) == 3 ? GDM3_BASE : \
(_n) == 2 ? GDM2_BASE : GDM1_BASE)
#define REG_GDM_FWD_CFG(_n) GDM_BASE(_n)
#define GDM_PAD_EN BIT(28)
#define GDM_DROP_CRC_ERR BIT(23)
#define GDM_IP4_CKSUM BIT(22)
#define GDM_TCP_CKSUM BIT(21)
#define GDM_UDP_CKSUM BIT(20)
#define GDM_UCFQ_MASK GENMASK(15, 12)
#define GDM_BCFQ_MASK GENMASK(11, 8)
#define GDM_MCFQ_MASK GENMASK(7, 4)
#define GDM_OCFQ_MASK GENMASK(3, 0)
/* QDMA */
#define REG_QDMA_GLOBAL_CFG 0x0004
#define GLOBAL_CFG_RX_2B_OFFSET_MASK BIT(31)
#define GLOBAL_CFG_DMA_PREFERENCE_MASK GENMASK(30, 29)
#define GLOBAL_CFG_CPU_TXR_RR_MASK BIT(28)
#define GLOBAL_CFG_DSCP_BYTE_SWAP_MASK BIT(27)
#define GLOBAL_CFG_PAYLOAD_BYTE_SWAP_MASK BIT(26)
#define GLOBAL_CFG_MULTICAST_MODIFY_FP_MASK BIT(25)
#define GLOBAL_CFG_OAM_MODIFY_MASK BIT(24)
#define GLOBAL_CFG_RESET_MASK BIT(23)
#define GLOBAL_CFG_RESET_DONE_MASK BIT(22)
#define GLOBAL_CFG_MULTICAST_EN_MASK BIT(21)
#define GLOBAL_CFG_IRQ1_EN_MASK BIT(20)
#define GLOBAL_CFG_IRQ0_EN_MASK BIT(19)
#define GLOBAL_CFG_LOOPCNT_EN_MASK BIT(18)
#define GLOBAL_CFG_RD_BYPASS_WR_MASK BIT(17)
#define GLOBAL_CFG_QDMA_LOOPBACK_MASK BIT(16)
#define GLOBAL_CFG_LPBK_RXQ_SEL_MASK GENMASK(13, 8)
#define GLOBAL_CFG_CHECK_DONE_MASK BIT(7)
#define GLOBAL_CFG_TX_WB_DONE_MASK BIT(6)
#define GLOBAL_CFG_MAX_ISSUE_NUM_MASK GENMASK(5, 4)
#define GLOBAL_CFG_RX_DMA_BUSY_MASK BIT(3)
#define GLOBAL_CFG_RX_DMA_EN_MASK BIT(2)
#define GLOBAL_CFG_TX_DMA_BUSY_MASK BIT(1)
#define GLOBAL_CFG_TX_DMA_EN_MASK BIT(0)
#define REG_FWD_DSCP_BASE 0x0010
#define REG_FWD_BUF_BASE 0x0014
#define REG_HW_FWD_DSCP_CFG 0x0018
#define HW_FWD_DSCP_PAYLOAD_SIZE_MASK GENMASK(29, 28)
#define HW_FWD_DSCP_SCATTER_LEN_MASK GENMASK(17, 16)
#define HW_FWD_DSCP_MIN_SCATTER_LEN_MASK GENMASK(15, 0)
#define REG_INT_STATUS(_n) \
(((_n) == 4) ? 0x0730 : \
((_n) == 3) ? 0x0724 : \
((_n) == 2) ? 0x0720 : \
((_n) == 1) ? 0x0024 : 0x0020)
#define REG_TX_IRQ_BASE(_n) ((_n) ? 0x0048 : 0x0050)
#define REG_TX_IRQ_CFG(_n) ((_n) ? 0x004c : 0x0054)
#define TX_IRQ_THR_MASK GENMASK(27, 16)
#define TX_IRQ_DEPTH_MASK GENMASK(11, 0)
#define REG_IRQ_CLEAR_LEN(_n) ((_n) ? 0x0064 : 0x0058)
#define IRQ_CLEAR_LEN_MASK GENMASK(7, 0)
#define REG_TX_RING_BASE(_n) \
(((_n) < 8) ? 0x0100 + ((_n) << 5) : 0x0b00 + (((_n) - 8) << 5))
#define REG_TX_CPU_IDX(_n) \
(((_n) < 8) ? 0x0108 + ((_n) << 5) : 0x0b08 + (((_n) - 8) << 5))
#define TX_RING_CPU_IDX_MASK GENMASK(15, 0)
#define REG_TX_DMA_IDX(_n) \
(((_n) < 8) ? 0x010c + ((_n) << 5) : 0x0b0c + (((_n) - 8) << 5))
#define TX_RING_DMA_IDX_MASK GENMASK(15, 0)
#define IRQ_RING_IDX_MASK GENMASK(20, 16)
#define IRQ_DESC_IDX_MASK GENMASK(15, 0)
#define REG_RX_RING_BASE(_n) \
(((_n) < 16) ? 0x0200 + ((_n) << 5) : 0x0e00 + (((_n) - 16) << 5))
#define REG_RX_RING_SIZE(_n) \
(((_n) < 16) ? 0x0204 + ((_n) << 5) : 0x0e04 + (((_n) - 16) << 5))
#define RX_RING_THR_MASK GENMASK(31, 16)
#define RX_RING_SIZE_MASK GENMASK(15, 0)
#define REG_RX_CPU_IDX(_n) \
(((_n) < 16) ? 0x0208 + ((_n) << 5) : 0x0e08 + (((_n) - 16) << 5))
#define RX_RING_CPU_IDX_MASK GENMASK(15, 0)
#define REG_RX_DMA_IDX(_n) \
(((_n) < 16) ? 0x020c + ((_n) << 5) : 0x0e0c + (((_n) - 16) << 5))
#define REG_RX_DELAY_INT_IDX(_n) \
(((_n) < 16) ? 0x0210 + ((_n) << 5) : 0x0e10 + (((_n) - 16) << 5))
#define RX_DELAY_INT_MASK GENMASK(15, 0)
#define RX_RING_DMA_IDX_MASK GENMASK(15, 0)
#define REG_LMGR_INIT_CFG 0x1000
#define LMGR_INIT_START BIT(31)
#define LMGR_SRAM_MODE_MASK BIT(30)
#define HW_FWD_PKTSIZE_OVERHEAD_MASK GENMASK(27, 20)
#define HW_FWD_DESC_NUM_MASK GENMASK(16, 0)
/* CTRL */
#define QDMA_DESC_DONE_MASK BIT(31)
#define QDMA_DESC_DROP_MASK BIT(30) /* tx: drop - rx: overflow */
#define QDMA_DESC_MORE_MASK BIT(29) /* more SG elements */
#define QDMA_DESC_DEI_MASK BIT(25)
#define QDMA_DESC_NO_DROP_MASK BIT(24)
#define QDMA_DESC_LEN_MASK GENMASK(15, 0)
/* DATA */
#define QDMA_DESC_NEXT_ID_MASK GENMASK(15, 0)
/* TX MSG0 */
#define QDMA_ETH_TXMSG_MIC_IDX_MASK BIT(30)
#define QDMA_ETH_TXMSG_SP_TAG_MASK GENMASK(29, 14)
#define QDMA_ETH_TXMSG_ICO_MASK BIT(13)
#define QDMA_ETH_TXMSG_UCO_MASK BIT(12)
#define QDMA_ETH_TXMSG_TCO_MASK BIT(11)
#define QDMA_ETH_TXMSG_TSO_MASK BIT(10)
#define QDMA_ETH_TXMSG_FAST_MASK BIT(9)
#define QDMA_ETH_TXMSG_OAM_MASK BIT(8)
#define QDMA_ETH_TXMSG_CHAN_MASK GENMASK(7, 3)
#define QDMA_ETH_TXMSG_QUEUE_MASK GENMASK(2, 0)
/* TX MSG1 */
#define QDMA_ETH_TXMSG_NO_DROP BIT(31)
#define QDMA_ETH_TXMSG_METER_MASK GENMASK(30, 24) /* 0x7f no meters */
#define QDMA_ETH_TXMSG_FPORT_MASK GENMASK(23, 20)
#define QDMA_ETH_TXMSG_NBOQ_MASK GENMASK(19, 15)
#define QDMA_ETH_TXMSG_HWF_MASK BIT(14)
#define QDMA_ETH_TXMSG_HOP_MASK BIT(13)
#define QDMA_ETH_TXMSG_PTP_MASK BIT(12)
#define QDMA_ETH_TXMSG_ACNT_G1_MASK GENMASK(10, 6) /* 0x1f do not count */
#define QDMA_ETH_TXMSG_ACNT_G0_MASK GENMASK(5, 0) /* 0x3f do not count */
/* RX MSG1 */
#define QDMA_ETH_RXMSG_DEI_MASK BIT(31)
#define QDMA_ETH_RXMSG_IP6_MASK BIT(30)
#define QDMA_ETH_RXMSG_IP4_MASK BIT(29)
#define QDMA_ETH_RXMSG_IP4F_MASK BIT(28)
#define QDMA_ETH_RXMSG_L4_VALID_MASK BIT(27)
#define QDMA_ETH_RXMSG_L4F_MASK BIT(26)
#define QDMA_ETH_RXMSG_SPORT_MASK GENMASK(25, 21)
#define QDMA_ETH_RXMSG_CRSN_MASK GENMASK(20, 16)
#define QDMA_ETH_RXMSG_PPE_ENTRY_MASK GENMASK(15, 0)
struct airoha_qdma_desc {
__le32 rsv;
__le32 ctrl;
__le32 addr;
__le32 data;
__le32 msg0;
__le32 msg1;
__le32 msg2;
__le32 msg3;
};
struct airoha_qdma_fwd_desc {
__le32 addr;
__le32 ctrl0;
__le32 ctrl1;
__le32 ctrl2;
__le32 msg0;
__le32 msg1;
__le32 rsv0;
__le32 rsv1;
};
struct airoha_queue {
struct airoha_qdma_desc *desc;
u16 head;
int ndesc;
};
struct airoha_tx_irq_queue {
struct airoha_qdma *qdma;
int size;
u32 *q;
};
struct airoha_qdma {
struct airoha_eth *eth;
void __iomem *regs;
struct airoha_tx_irq_queue q_tx_irq[AIROHA_NUM_TX_IRQ];
struct airoha_queue q_tx[AIROHA_NUM_TX_RING];
struct airoha_queue q_rx[AIROHA_NUM_RX_RING];
/* descriptor and packet buffers for qdma hw forward */
struct {
void *desc;
void *q;
} hfwd;
};
struct airoha_gdm_port {
struct airoha_qdma *qdma;
int id;
};
struct airoha_eth {
void __iomem *fe_regs;
void __iomem *switch_regs;
struct reset_ctl_bulk rsts;
struct reset_ctl_bulk xsi_rsts;
struct airoha_qdma qdma[AIROHA_MAX_NUM_QDMA];
struct airoha_gdm_port *ports[AIROHA_MAX_NUM_GDM_PORTS];
};
struct airoha_eth_soc_data {
int num_xsi_rsts;
const char * const *xsi_rsts_names;
const char *switch_compatible;
};
static const char * const en7523_xsi_rsts_names[] = {
"hsi0-mac",
"hsi1-mac",
"hsi-mac",
};
static const char * const en7581_xsi_rsts_names[] = {
"hsi0-mac",
"hsi1-mac",
"hsi-mac",
"xfp-mac",
};
static u32 airoha_rr(void __iomem *base, u32 offset)
{
return readl(base + offset);
}
static void airoha_wr(void __iomem *base, u32 offset, u32 val)
{
writel(val, base + offset);
}
static u32 airoha_rmw(void __iomem *base, u32 offset, u32 mask, u32 val)
{
val |= (airoha_rr(base, offset) & ~mask);
airoha_wr(base, offset, val);
return val;
}
#define airoha_fe_rr(eth, offset) \
airoha_rr((eth)->fe_regs, (offset))
#define airoha_fe_wr(eth, offset, val) \
airoha_wr((eth)->fe_regs, (offset), (val))
#define airoha_fe_rmw(eth, offset, mask, val) \
airoha_rmw((eth)->fe_regs, (offset), (mask), (val))
#define airoha_fe_set(eth, offset, val) \
airoha_rmw((eth)->fe_regs, (offset), 0, (val))
#define airoha_fe_clear(eth, offset, val) \
airoha_rmw((eth)->fe_regs, (offset), (val), 0)
#define airoha_qdma_rr(qdma, offset) \
airoha_rr((qdma)->regs, (offset))
#define airoha_qdma_wr(qdma, offset, val) \
airoha_wr((qdma)->regs, (offset), (val))
#define airoha_qdma_rmw(qdma, offset, mask, val) \
airoha_rmw((qdma)->regs, (offset), (mask), (val))
#define airoha_qdma_set(qdma, offset, val) \
airoha_rmw((qdma)->regs, (offset), 0, (val))
#define airoha_qdma_clear(qdma, offset, val) \
airoha_rmw((qdma)->regs, (offset), (val), 0)
#define airoha_switch_wr(eth, offset, val) \
airoha_wr((eth)->switch_regs, (offset), (val))
static inline dma_addr_t dma_map_unaligned(void *vaddr, size_t len,
enum dma_data_direction dir)
{
uintptr_t start, end;
start = ALIGN_DOWN((uintptr_t)vaddr, ARCH_DMA_MINALIGN);
end = ALIGN((uintptr_t)(vaddr + len), ARCH_DMA_MINALIGN);
return dma_map_single((void *)start, end - start, dir);
}
static inline void dma_unmap_unaligned(dma_addr_t addr, size_t len,
enum dma_data_direction dir)
{
uintptr_t start, end;
start = ALIGN_DOWN((uintptr_t)addr, ARCH_DMA_MINALIGN);
end = ALIGN((uintptr_t)(addr + len), ARCH_DMA_MINALIGN);
dma_unmap_single(start, end - start, dir);
}
static void airoha_fe_maccr_init(struct airoha_eth *eth)
{
int p;
for (p = 1; p <= ARRAY_SIZE(eth->ports); p++) {
/*
* Disable any kind of CRC drop or offload.
* Enable padding of short TX packets to 60 bytes.
*/
airoha_fe_wr(eth, REG_GDM_FWD_CFG(p), GDM_PAD_EN);
}
}
static int airoha_fe_init(struct airoha_eth *eth)
{
airoha_fe_maccr_init(eth);
return 0;
}
static void airoha_qdma_reset_rx_desc(struct airoha_queue *q, int index)
{
struct airoha_qdma_desc *desc;
uchar *rx_packet;
u32 val;
desc = &q->desc[index];
rx_packet = net_rx_packets[index];
index = (index + 1) % q->ndesc;
dma_map_single(rx_packet, PKTSIZE_ALIGN, DMA_TO_DEVICE);
WRITE_ONCE(desc->msg0, cpu_to_le32(0));
WRITE_ONCE(desc->msg1, cpu_to_le32(0));
WRITE_ONCE(desc->msg2, cpu_to_le32(0));
WRITE_ONCE(desc->msg3, cpu_to_le32(0));
WRITE_ONCE(desc->addr, cpu_to_le32(virt_to_phys(rx_packet)));
WRITE_ONCE(desc->data, cpu_to_le32(index));
val = FIELD_PREP(QDMA_DESC_LEN_MASK, PKTSIZE_ALIGN);
WRITE_ONCE(desc->ctrl, cpu_to_le32(val));
dma_map_unaligned(desc, sizeof(*desc), DMA_TO_DEVICE);
}
static void airoha_qdma_init_rx_desc(struct airoha_queue *q)
{
int i;
for (i = 0; i < q->ndesc; i++)
airoha_qdma_reset_rx_desc(q, i);
}
static int airoha_qdma_init_rx_queue(struct airoha_queue *q,
struct airoha_qdma *qdma, int ndesc)
{
int qid = q - &qdma->q_rx[0];
unsigned long dma_addr;
q->ndesc = ndesc;
q->head = 0;
q->desc = dma_alloc_coherent(q->ndesc * sizeof(*q->desc), &dma_addr);
if (!q->desc)
return -ENOMEM;
memset(q->desc, 0, q->ndesc * sizeof(*q->desc));
dma_map_single(q->desc, q->ndesc * sizeof(*q->desc), DMA_TO_DEVICE);
airoha_qdma_wr(qdma, REG_RX_RING_BASE(qid), dma_addr);
airoha_qdma_rmw(qdma, REG_RX_RING_SIZE(qid),
RX_RING_SIZE_MASK,
FIELD_PREP(RX_RING_SIZE_MASK, ndesc));
airoha_qdma_rmw(qdma, REG_RX_RING_SIZE(qid), RX_RING_THR_MASK,
FIELD_PREP(RX_RING_THR_MASK, 0));
airoha_qdma_rmw(qdma, REG_RX_CPU_IDX(qid), RX_RING_CPU_IDX_MASK,
FIELD_PREP(RX_RING_CPU_IDX_MASK, q->ndesc - 1));
airoha_qdma_rmw(qdma, REG_RX_DMA_IDX(qid), RX_RING_DMA_IDX_MASK,
FIELD_PREP(RX_RING_DMA_IDX_MASK, q->head));
return 0;
}
static int airoha_qdma_init_rx(struct airoha_qdma *qdma)
{
int i;
for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
int err;
err = airoha_qdma_init_rx_queue(&qdma->q_rx[i], qdma,
RX_DSCP_NUM);
if (err)
return err;
}
return 0;
}
static int airoha_qdma_init_tx_queue(struct airoha_queue *q,
struct airoha_qdma *qdma, int size)
{
int qid = q - &qdma->q_tx[0];
unsigned long dma_addr;
q->ndesc = size;
q->head = 0;
q->desc = dma_alloc_coherent(q->ndesc * sizeof(*q->desc), &dma_addr);
if (!q->desc)
return -ENOMEM;
memset(q->desc, 0, q->ndesc * sizeof(*q->desc));
dma_map_single(q->desc, q->ndesc * sizeof(*q->desc), DMA_TO_DEVICE);
airoha_qdma_wr(qdma, REG_TX_RING_BASE(qid), dma_addr);
airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), TX_RING_CPU_IDX_MASK,
FIELD_PREP(TX_RING_CPU_IDX_MASK, q->head));
airoha_qdma_rmw(qdma, REG_TX_DMA_IDX(qid), TX_RING_DMA_IDX_MASK,
FIELD_PREP(TX_RING_DMA_IDX_MASK, q->head));
return 0;
}
static int airoha_qdma_tx_irq_init(struct airoha_tx_irq_queue *irq_q,
struct airoha_qdma *qdma, int size)
{
int id = irq_q - &qdma->q_tx_irq[0];
unsigned long dma_addr;
irq_q->q = dma_alloc_coherent(size * sizeof(u32), &dma_addr);
if (!irq_q->q)
return -ENOMEM;
memset(irq_q->q, 0xffffffff, size * sizeof(u32));
irq_q->size = size;
irq_q->qdma = qdma;
dma_map_single(irq_q->q, size * sizeof(u32), DMA_TO_DEVICE);
airoha_qdma_wr(qdma, REG_TX_IRQ_BASE(id), dma_addr);
airoha_qdma_rmw(qdma, REG_TX_IRQ_CFG(id), TX_IRQ_DEPTH_MASK,
FIELD_PREP(TX_IRQ_DEPTH_MASK, size));
return 0;
}
static int airoha_qdma_init_tx(struct airoha_qdma *qdma)
{
int i, err;
for (i = 0; i < ARRAY_SIZE(qdma->q_tx_irq); i++) {
err = airoha_qdma_tx_irq_init(&qdma->q_tx_irq[i], qdma,
IRQ_QUEUE_LEN);
if (err)
return err;
}
for (i = 0; i < ARRAY_SIZE(qdma->q_tx); i++) {
err = airoha_qdma_init_tx_queue(&qdma->q_tx[i], qdma,
TX_DSCP_NUM);
if (err)
return err;
}
return 0;
}
static int airoha_qdma_init_hfwd_queues(struct airoha_qdma *qdma)
{
unsigned long dma_addr;
u32 status;
int size;
size = HW_DSCP_NUM * sizeof(struct airoha_qdma_fwd_desc);
qdma->hfwd.desc = dma_alloc_coherent(size, &dma_addr);
if (!qdma->hfwd.desc)
return -ENOMEM;
memset(qdma->hfwd.desc, 0, size);
dma_map_single(qdma->hfwd.desc, size, DMA_TO_DEVICE);
airoha_qdma_wr(qdma, REG_FWD_DSCP_BASE, dma_addr);
size = AIROHA_MAX_PACKET_SIZE * HW_DSCP_NUM;
qdma->hfwd.q = dma_alloc_coherent(size, &dma_addr);
if (!qdma->hfwd.q)
return -ENOMEM;
memset(qdma->hfwd.q, 0, size);
dma_map_single(qdma->hfwd.q, size, DMA_TO_DEVICE);
airoha_qdma_wr(qdma, REG_FWD_BUF_BASE, dma_addr);
airoha_qdma_rmw(qdma, REG_HW_FWD_DSCP_CFG,
HW_FWD_DSCP_PAYLOAD_SIZE_MASK |
HW_FWD_DSCP_MIN_SCATTER_LEN_MASK,
FIELD_PREP(HW_FWD_DSCP_PAYLOAD_SIZE_MASK, 0) |
FIELD_PREP(HW_FWD_DSCP_MIN_SCATTER_LEN_MASK, 1));
airoha_qdma_rmw(qdma, REG_LMGR_INIT_CFG,
LMGR_INIT_START | LMGR_SRAM_MODE_MASK |
HW_FWD_DESC_NUM_MASK,
FIELD_PREP(HW_FWD_DESC_NUM_MASK, HW_DSCP_NUM) |
LMGR_INIT_START);
udelay(1000);
return read_poll_timeout(airoha_qdma_rr, status,
!(status & LMGR_INIT_START), USEC_PER_MSEC,
30 * USEC_PER_MSEC, qdma,
REG_LMGR_INIT_CFG);
}
static int airoha_qdma_hw_init(struct airoha_qdma *qdma)
{
int i;
/* clear pending irqs */
for (i = 0; i < 2; i++)
airoha_qdma_wr(qdma, REG_INT_STATUS(i), 0xffffffff);
airoha_qdma_wr(qdma, REG_QDMA_GLOBAL_CFG,
GLOBAL_CFG_CPU_TXR_RR_MASK |
GLOBAL_CFG_PAYLOAD_BYTE_SWAP_MASK |
GLOBAL_CFG_IRQ0_EN_MASK |
GLOBAL_CFG_TX_WB_DONE_MASK |
FIELD_PREP(GLOBAL_CFG_MAX_ISSUE_NUM_MASK, 3));
/* disable qdma rx delay interrupt */
for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
if (!qdma->q_rx[i].ndesc)
continue;
airoha_qdma_clear(qdma, REG_RX_DELAY_INT_IDX(i),
RX_DELAY_INT_MASK);
}
return 0;
}
static int airoha_qdma_init(struct udevice *dev,
struct airoha_eth *eth,
struct airoha_qdma *qdma)
{
int err;
qdma->eth = eth;
qdma->regs = dev_remap_addr_name(dev, "qdma0");
if (IS_ERR(qdma->regs))
return PTR_ERR(qdma->regs);
err = airoha_qdma_init_rx(qdma);
if (err)
return err;
err = airoha_qdma_init_tx(qdma);
if (err)
return err;
err = airoha_qdma_init_hfwd_queues(qdma);
if (err)
return err;
return airoha_qdma_hw_init(qdma);
}
static int airoha_hw_init(struct udevice *dev,
struct airoha_eth *eth)
{
int ret, i;
/* disable xsi */
ret = reset_assert_bulk(ð->xsi_rsts);
if (ret)
return ret;
ret = reset_assert_bulk(ð->rsts);
if (ret)
return ret;
mdelay(20);
ret = reset_deassert_bulk(ð->rsts);
if (ret)
return ret;
mdelay(20);
ret = airoha_fe_init(eth);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(eth->qdma); i++) {
ret = airoha_qdma_init(dev, eth, ð->qdma[i]);
if (ret)
return ret;
}
return 0;
}
static int airoha_switch_init(struct udevice *dev, struct airoha_eth *eth)
{
struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);
ofnode switch_node;
fdt_addr_t addr;
switch_node = ofnode_by_compatible(ofnode_null(),
data->switch_compatible);
if (!ofnode_valid(switch_node))
return -EINVAL;
addr = ofnode_get_addr(switch_node);
if (addr == FDT_ADDR_T_NONE)
return -ENOMEM;
/* Switch doesn't have a DEV, gets address and setup Flood and CPU port */
eth->switch_regs = map_sysmem(addr, 0);
/* Set FLOOD, no CPU switch register */
airoha_switch_wr(eth, SWITCH_MFC, SWITCH_BC_FFP | SWITCH_UNM_FFP |
SWITCH_UNU_FFP);
/* Set CPU 6 PMCR */
airoha_switch_wr(eth, SWITCH_PMCR(6),
SWITCH_IPG_CFG_SHORT | SWITCH_MAC_MODE |
SWITCH_FORCE_MODE | SWITCH_MAC_TX_EN |
SWITCH_MAC_RX_EN | SWITCH_BKOFF_EN | SWITCH_BKPR_EN |
SWITCH_FORCE_RX_FC | SWITCH_FORCE_TX_FC |
SWITCH_FORCE_SPD_1000 | SWITCH_FORCE_DPX |
SWITCH_FORCE_LNK);
/* Sideband signal error for Port 3, which need the auto polling */
airoha_switch_wr(eth, SWITCH_PHY_POLL,
FIELD_PREP(SWITCH_PHY_AP_EN, 0x7f) |
FIELD_PREP(SWITCH_EEE_POLL_EN, 0x7f) |
SWITCH_PHY_PRE_EN |
FIELD_PREP(SWITCH_PHY_END_ADDR, 0xc) |
FIELD_PREP(SWITCH_PHY_ST_ADDR, 0x8));
return 0;
}
static int airoha_eth_probe(struct udevice *dev)
{
struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);
struct airoha_eth *eth = dev_get_priv(dev);
struct regmap *scu_regmap;
int i, ret;
scu_regmap = airoha_get_scu_regmap();
if (IS_ERR(scu_regmap))
return PTR_ERR(scu_regmap);
/* It seems by default the FEMEM_SEL is set to Memory (0x1)
* preventing any access to any QDMA and FrameEngine register
* reporting all 0xdeadbeef (poor cow :( )
*/
regmap_write(scu_regmap, SCU_SHARE_FEMEM_SEL, 0x0);
eth->fe_regs = dev_remap_addr_name(dev, "fe");
if (!eth->fe_regs)
return -ENOMEM;
eth->rsts.resets = devm_kcalloc(dev, AIROHA_MAX_NUM_RSTS,
sizeof(struct reset_ctl), GFP_KERNEL);
if (!eth->rsts.resets)
return -ENOMEM;
eth->rsts.count = AIROHA_MAX_NUM_RSTS;
eth->xsi_rsts.resets = devm_kcalloc(dev, data->num_xsi_rsts,
sizeof(struct reset_ctl), GFP_KERNEL);
if (!eth->xsi_rsts.resets)
return -ENOMEM;
eth->xsi_rsts.count = data->num_xsi_rsts;
ret = reset_get_by_name(dev, "fe", ð->rsts.resets[0]);
if (ret)
return ret;
ret = reset_get_by_name(dev, "pdma", ð->rsts.resets[1]);
if (ret)
return ret;
ret = reset_get_by_name(dev, "qdma", ð->rsts.resets[2]);
if (ret)
return ret;
for (i = 0; i < data->num_xsi_rsts; i++) {
ret = reset_get_by_name(dev, data->xsi_rsts_names[i],
ð->xsi_rsts.resets[i]);
if (ret)
return ret;
}
ret = airoha_hw_init(dev, eth);
if (ret)
return ret;
return airoha_switch_init(dev, eth);
}
static int airoha_eth_init(struct udevice *dev)
{
struct airoha_eth *eth = dev_get_priv(dev);
struct airoha_qdma *qdma = ð->qdma[0];
struct airoha_queue *q;
int qid;
qid = 0;
q = &qdma->q_rx[qid];
airoha_qdma_init_rx_desc(q);
airoha_qdma_set(qdma, REG_QDMA_GLOBAL_CFG,
GLOBAL_CFG_TX_DMA_EN_MASK |
GLOBAL_CFG_RX_DMA_EN_MASK);
return 0;
}
static void airoha_eth_stop(struct udevice *dev)
{
struct airoha_eth *eth = dev_get_priv(dev);
struct airoha_qdma *qdma = ð->qdma[0];
airoha_qdma_clear(qdma, REG_QDMA_GLOBAL_CFG,
GLOBAL_CFG_TX_DMA_EN_MASK |
GLOBAL_CFG_RX_DMA_EN_MASK);
}
static int airoha_eth_send(struct udevice *dev, void *packet, int length)
{
struct airoha_eth *eth = dev_get_priv(dev);
struct airoha_qdma *qdma = ð->qdma[0];
struct airoha_qdma_desc *desc;
struct airoha_queue *q;
dma_addr_t dma_addr;
u32 msg0, msg1;
int qid, index;
u8 fport;
u32 val;
int i;
/*
* There is no need to pad short TX packets to 60 bytes since the
* GDM_PAD_EN bit set in the corresponding REG_GDM_FWD_CFG(n) register.
*/
dma_addr = dma_map_single(packet, length, DMA_TO_DEVICE);
qid = 0;
q = &qdma->q_tx[qid];
desc = &q->desc[q->head];
index = (q->head + 1) % q->ndesc;
fport = 1;
msg0 = 0;
msg1 = FIELD_PREP(QDMA_ETH_TXMSG_FPORT_MASK, fport) |
FIELD_PREP(QDMA_ETH_TXMSG_METER_MASK, 0x7f);
val = FIELD_PREP(QDMA_DESC_LEN_MASK, length);
WRITE_ONCE(desc->ctrl, cpu_to_le32(val));
WRITE_ONCE(desc->addr, cpu_to_le32(dma_addr));
val = FIELD_PREP(QDMA_DESC_NEXT_ID_MASK, index);
WRITE_ONCE(desc->data, cpu_to_le32(val));
WRITE_ONCE(desc->msg0, cpu_to_le32(msg0));
WRITE_ONCE(desc->msg1, cpu_to_le32(msg1));
WRITE_ONCE(desc->msg2, cpu_to_le32(0xffff));
dma_map_unaligned(desc, sizeof(*desc), DMA_TO_DEVICE);
airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), TX_RING_CPU_IDX_MASK,
FIELD_PREP(TX_RING_CPU_IDX_MASK, index));
for (i = 0; i < 100; i++) {
dma_unmap_unaligned(virt_to_phys(desc), sizeof(*desc),
DMA_FROM_DEVICE);
if (desc->ctrl & QDMA_DESC_DONE_MASK)
break;
udelay(1);
}
/* Return error if for some reason the descriptor never ACK */
if (!(desc->ctrl & QDMA_DESC_DONE_MASK))
return -EAGAIN;
q->head = index;
airoha_qdma_rmw(qdma, REG_IRQ_CLEAR_LEN(0),
IRQ_CLEAR_LEN_MASK, 1);
return 0;
}
static int airoha_eth_recv(struct udevice *dev, int flags, uchar **packetp)
{
struct airoha_eth *eth = dev_get_priv(dev);
struct airoha_qdma *qdma = ð->qdma[0];
struct airoha_qdma_desc *desc;
struct airoha_queue *q;
u16 length;
int qid;
qid = 0;
q = &qdma->q_rx[qid];
desc = &q->desc[q->head];
dma_unmap_unaligned(virt_to_phys(desc), sizeof(*desc),
DMA_FROM_DEVICE);
if (!(desc->ctrl & QDMA_DESC_DONE_MASK))
return -EAGAIN;
length = FIELD_GET(QDMA_DESC_LEN_MASK, desc->ctrl);
dma_unmap_single(desc->addr, length,
DMA_FROM_DEVICE);
*packetp = phys_to_virt(desc->addr);
return length;
}
static int arht_eth_free_pkt(struct udevice *dev, uchar *packet, int length)
{
struct airoha_eth *eth = dev_get_priv(dev);
struct airoha_qdma *qdma = ð->qdma[0];
struct airoha_queue *q;
int qid;
if (!packet)
return 0;
qid = 0;
q = &qdma->q_rx[qid];
/*
* Due to cpu cache issue the airoha_qdma_reset_rx_desc() function
* will always touch 2 descriptors placed on the same cacheline:
* - if current descriptor is even, then current and next
* descriptors will be touched
* - if current descriptor is odd, then current and previous
* descriptors will be touched
*
* Thus, to prevent possible destroying of rx queue, we should:
* - do nothing in the even descriptor case,
* - utilize 2 descriptors (current and previous one) in the
* odd descriptor case.
*
* WARNING: Observations shows that PKTBUFSRX must be even and
* larger than 7 for reliable driver operations.
*/
if (q->head & 0x01) {
airoha_qdma_reset_rx_desc(q, q->head - 1);
airoha_qdma_reset_rx_desc(q, q->head);
airoha_qdma_rmw(qdma, REG_RX_CPU_IDX(qid), RX_RING_CPU_IDX_MASK,
FIELD_PREP(RX_RING_CPU_IDX_MASK, q->head));
}
q->head = (q->head + 1) % q->ndesc;
return 0;
}
static int arht_eth_write_hwaddr(struct udevice *dev)
{
struct eth_pdata *pdata = dev_get_plat(dev);
struct airoha_eth *eth = dev_get_priv(dev);
unsigned char *mac = pdata->enetaddr;
u32 macaddr_lsb, macaddr_msb;
macaddr_lsb = FIELD_PREP(SMACCR0_MAC2, mac[2]) |
FIELD_PREP(SMACCR0_MAC3, mac[3]) |
FIELD_PREP(SMACCR0_MAC4, mac[4]) |
FIELD_PREP(SMACCR0_MAC5, mac[5]);
macaddr_msb = FIELD_PREP(SMACCR1_MAC1, mac[1]) |
FIELD_PREP(SMACCR1_MAC0, mac[0]);
/* Set MAC for Switch */
airoha_switch_wr(eth, SWITCH_SMACCR0, macaddr_lsb);
airoha_switch_wr(eth, SWITCH_SMACCR1, macaddr_msb);
return 0;
}
static int airoha_eth_bind(struct udevice *dev)
{
struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);
ofnode switch_node, mdio_node;
struct udevice *mdio_dev;
int ret = 0;
if (!CONFIG_IS_ENABLED(MDIO_MT7531_MMIO))
return 0;
switch_node = ofnode_by_compatible(ofnode_null(),
data->switch_compatible);
if (!ofnode_valid(switch_node)) {
debug("Warning: missing switch node\n");
return 0;
}
mdio_node = ofnode_find_subnode(switch_node, "mdio");
if (!ofnode_valid(mdio_node)) {
debug("Warning: missing mdio node\n");
return 0;
}
ret = device_bind_driver_to_node(dev, "mt7531-mdio-mmio", "mdio",
mdio_node, &mdio_dev);
if (ret)
debug("Warning: failed to bind mdio controller\n");
return 0;
}
static const struct airoha_eth_soc_data en7523_data = {
.xsi_rsts_names = en7523_xsi_rsts_names,
.num_xsi_rsts = ARRAY_SIZE(en7523_xsi_rsts_names),
.switch_compatible = "airoha,en7523-switch",
};
static const struct airoha_eth_soc_data en7581_data = {
.xsi_rsts_names = en7581_xsi_rsts_names,
.num_xsi_rsts = ARRAY_SIZE(en7581_xsi_rsts_names),
.switch_compatible = "airoha,en7581-switch",
};
static const struct udevice_id airoha_eth_ids[] = {
{ .compatible = "airoha,en7523-eth",
.data = (ulong)&en7523_data,
},
{ .compatible = "airoha,en7581-eth",
.data = (ulong)&en7581_data,
},
{ }
};
static const struct eth_ops airoha_eth_ops = {
.start = airoha_eth_init,
.stop = airoha_eth_stop,
.send = airoha_eth_send,
.recv = airoha_eth_recv,
.free_pkt = arht_eth_free_pkt,
.write_hwaddr = arht_eth_write_hwaddr,
};
U_BOOT_DRIVER(airoha_eth) = {
.name = "airoha-eth",
.id = UCLASS_ETH,
.of_match = airoha_eth_ids,
.probe = airoha_eth_probe,
.bind = airoha_eth_bind,
.ops = &airoha_eth_ops,
.priv_auto = sizeof(struct airoha_eth),
.plat_auto = sizeof(struct eth_pdata),
};