From: Rafał Miłecki Date: Wed, 10 Feb 2021 10:27:44 +0000 (+0100) Subject: bcm4908: update Ethernet driver X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c382fe857df16b40e499be2ec81a258ce1b9a98d;p=openwrt%2Fstaging%2Frobimarko.git bcm4908: update Ethernet driver Use the latest version sent upsteram. Signed-off-by: Rafał Miłecki --- diff --git a/target/linux/bcm4908/config-5.4 b/target/linux/bcm4908/config-5.4 index 2a3cd647fc..a3cca74c76 100644 --- a/target/linux/bcm4908/config-5.4 +++ b/target/linux/bcm4908/config-5.4 @@ -40,7 +40,7 @@ CONFIG_B53=y # CONFIG_B53_MMAP_DRIVER is not set # CONFIG_B53_SERDES is not set # CONFIG_B53_SRAB_DRIVER is not set -CONFIG_BCM4908ENET=y +CONFIG_BCM4908_ENET=y CONFIG_BCM7XXX_PHY=y CONFIG_BCM_NET_PHYLIB=y CONFIG_BCM_PMB=y diff --git a/target/linux/bcm4908/patches-5.4/170-0001-dt-bindings-net-document-BCM4908-Ethernet-controller.patch b/target/linux/bcm4908/patches-5.4/170-0001-dt-bindings-net-document-BCM4908-Ethernet-controller.patch index 4c0f44199b..74dda6454f 100644 --- a/target/linux/bcm4908/patches-5.4/170-0001-dt-bindings-net-document-BCM4908-Ethernet-controller.patch +++ b/target/linux/bcm4908/patches-5.4/170-0001-dt-bindings-net-document-BCM4908-Ethernet-controller.patch @@ -1,22 +1,25 @@ From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Fri, 5 Feb 2021 21:57:41 +0100 Subject: [PATCH 1/2] dt-bindings: net: document BCM4908 Ethernet controller +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit BCM4908 is a family of SoCs with integrated Ethernet controller. Signed-off-by: Rafał Miłecki --- - .../bindings/net/brcm,bcm4908enet.yaml | 45 +++++++++++++++++++ - 1 file changed, 45 insertions(+) - create mode 100644 Documentation/devicetree/bindings/net/brcm,bcm4908enet.yaml + .../bindings/net/brcm,bcm4908-enet.yaml | 43 +++++++++++++++++++ + 1 file changed, 43 insertions(+) + create mode 100644 Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml --- /dev/null -+++ b/Documentation/devicetree/bindings/net/brcm,bcm4908enet.yaml -@@ -0,0 +1,45 @@ ++++ b/Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml +@@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- -+$id: http://devicetree.org/schemas/net/brcm,bcm4908enet.yaml# ++$id: http://devicetree.org/schemas/net/brcm,bcm4908-enet.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom BCM4908 Ethernet controller @@ -26,9 +29,12 @@ Signed-off-by: Rafał Miłecki +maintainers: + - Rafał Miłecki + ++allOf: ++ - $ref: ethernet-controller.yaml# ++ +properties: + compatible: -+ const: brcm,bcm4908enet ++ const: brcm,bcm4908-enet + + reg: + maxItems: 1 @@ -36,13 +42,9 @@ Signed-off-by: Rafał Miłecki + interrupts: + description: RX interrupt + -+ interrupt-names: -+ const: rx -+ +required: + - reg + - interrupts -+ - interrupt-names + +additionalProperties: false + @@ -52,9 +54,8 @@ Signed-off-by: Rafał Miłecki + #include + + ethernet@80002000 { -+ compatible = "brcm,bcm4908enet"; ++ compatible = "brcm,bcm4908-enet"; + reg = <0x80002000 0x1000>; + + interrupts = ; -+ interrupt-names = "rx"; + }; diff --git a/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908_enet-add-BCM4908-controller-dri.patch b/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908_enet-add-BCM4908-controller-dri.patch new file mode 100644 index 0000000000..4741df4ec4 --- /dev/null +++ b/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908_enet-add-BCM4908-controller-dri.patch @@ -0,0 +1,844 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Fri, 5 Feb 2021 21:59:51 +0100 +Subject: [PATCH 2/2] net: broadcom: bcm4908_enet: add BCM4908 controller + driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +BCM4908 SoCs family has integrated Ethernel controller that includes +UniMAC but uses different DMA engine (than other controllers) and +requires different programming. + +Ethernet controller in BCM4908 is always connected to the internal SF2 +switch's port and uses fixed link. + +Signed-off-by: Rafał Miłecki +--- + MAINTAINERS | 9 + + drivers/net/ethernet/broadcom/Kconfig | 8 + + drivers/net/ethernet/broadcom/Makefile | 1 + + drivers/net/ethernet/broadcom/bcm4908_enet.c | 671 +++++++++++++++++++ + drivers/net/ethernet/broadcom/bcm4908_enet.h | 96 +++ + 5 files changed, 785 insertions(+) + create mode 100644 drivers/net/ethernet/broadcom/bcm4908_enet.c + create mode 100644 drivers/net/ethernet/broadcom/bcm4908_enet.h + +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -3207,6 +3207,15 @@ F: Documentation/devicetree/bindings/mip + F: arch/mips/bcm47xx/* + F: arch/mips/include/asm/mach-bcm47xx/* + ++BROADCOM BCM4908 ETHERNET DRIVER ++M: Rafał Miłecki ++M: bcm-kernel-feedback-list@broadcom.com ++L: netdev@vger.kernel.org ++S: Maintained ++F: Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml ++F: drivers/net/ethernet/broadcom/bcm4908_enet.* ++F: drivers/net/ethernet/broadcom/unimac.h ++ + BROADCOM BCM5301X ARM ARCHITECTURE + M: Hauke Mehrtens + M: Rafał Miłecki +--- a/drivers/net/ethernet/broadcom/Kconfig ++++ b/drivers/net/ethernet/broadcom/Kconfig +@@ -51,6 +51,14 @@ config B44_PCI + depends on B44_PCI_AUTOSELECT && B44_PCICORE_AUTOSELECT + default y + ++config BCM4908_ENET ++ tristate "Broadcom BCM4908 internal mac support" ++ depends on ARCH_BCM4908 || COMPILE_TEST ++ default ARCH_BCM4908 ++ help ++ This driver supports Ethernet controller integrated into Broadcom ++ BCM4908 family SoCs. ++ + config BCM63XX_ENET + tristate "Broadcom 63xx internal mac support" + depends on BCM63XX +--- a/drivers/net/ethernet/broadcom/Makefile ++++ b/drivers/net/ethernet/broadcom/Makefile +@@ -4,6 +4,7 @@ + # + + obj-$(CONFIG_B44) += b44.o ++obj-$(CONFIG_BCM4908_ENET) += bcm4908_enet.o + obj-$(CONFIG_BCM63XX_ENET) += bcm63xx_enet.o + obj-$(CONFIG_BCMGENET) += genet/ + obj-$(CONFIG_BNX2) += bnx2.o +--- /dev/null ++++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c +@@ -0,0 +1,671 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Copyright (C) 2021 Rafał Miłecki ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include "bcm4908_enet.h" ++#include "unimac.h" ++ ++#define ENET_DMA_CH_RX_CFG ENET_DMA_CH0_CFG ++#define ENET_DMA_CH_TX_CFG ENET_DMA_CH1_CFG ++#define ENET_DMA_CH_RX_STATE_RAM ENET_DMA_CH0_STATE_RAM ++#define ENET_DMA_CH_TX_STATE_RAM ENET_DMA_CH1_STATE_RAM ++ ++#define ENET_TX_BDS_NUM 200 ++#define ENET_RX_BDS_NUM 200 ++#define ENET_RX_BDS_NUM_MAX 8192 ++ ++#define ENET_DMA_INT_DEFAULTS (ENET_DMA_CH_CFG_INT_DONE | \ ++ ENET_DMA_CH_CFG_INT_NO_DESC | \ ++ ENET_DMA_CH_CFG_INT_BUFF_DONE) ++#define ENET_DMA_MAX_BURST_LEN 8 /* in 64 bit words */ ++ ++#define ENET_MTU_MIN 60 ++#define ENET_MTU_MAX 1500 /* Is it possible to support 2044? */ ++#define ENET_MTU_MAX_EXTRA_SIZE 32 /* L2 */ ++ ++struct bcm4908_enet_dma_ring_bd { ++ __le32 ctl; ++ __le32 addr; ++} __packed; ++ ++struct bcm4908_enet_dma_ring_slot { ++ struct sk_buff *skb; ++ unsigned int len; ++ dma_addr_t dma_addr; ++}; ++ ++struct bcm4908_enet_dma_ring { ++ int is_tx; ++ int read_idx; ++ int write_idx; ++ int length; ++ u16 cfg_block; ++ u16 st_ram_block; ++ ++ union { ++ void *cpu_addr; ++ struct bcm4908_enet_dma_ring_bd *buf_desc; ++ }; ++ dma_addr_t dma_addr; ++ ++ struct bcm4908_enet_dma_ring_slot *slots; ++}; ++ ++struct bcm4908_enet { ++ struct device *dev; ++ struct net_device *netdev; ++ struct napi_struct napi; ++ void __iomem *base; ++ ++ struct bcm4908_enet_dma_ring tx_ring; ++ struct bcm4908_enet_dma_ring rx_ring; ++}; ++ ++/*** ++ * R/W ops ++ */ ++ ++static u32 enet_read(struct bcm4908_enet *enet, u16 offset) ++{ ++ return readl(enet->base + offset); ++} ++ ++static void enet_write(struct bcm4908_enet *enet, u16 offset, u32 value) ++{ ++ writel(value, enet->base + offset); ++} ++ ++static void enet_maskset(struct bcm4908_enet *enet, u16 offset, u32 mask, u32 set) ++{ ++ u32 val; ++ ++ WARN_ON(set & ~mask); ++ ++ val = enet_read(enet, offset); ++ val = (val & ~mask) | (set & mask); ++ enet_write(enet, offset, val); ++} ++ ++static void enet_set(struct bcm4908_enet *enet, u16 offset, u32 set) ++{ ++ enet_maskset(enet, offset, set, set); ++} ++ ++static u32 enet_umac_read(struct bcm4908_enet *enet, u16 offset) ++{ ++ return enet_read(enet, ENET_UNIMAC + offset); ++} ++ ++static void enet_umac_write(struct bcm4908_enet *enet, u16 offset, u32 value) ++{ ++ enet_write(enet, ENET_UNIMAC + offset, value); ++} ++ ++static void enet_umac_set(struct bcm4908_enet *enet, u16 offset, u32 set) ++{ ++ enet_set(enet, ENET_UNIMAC + offset, set); ++} ++ ++/*** ++ * Helpers ++ */ ++ ++static void bcm4908_enet_intrs_on(struct bcm4908_enet *enet) ++{ ++ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, ENET_DMA_INT_DEFAULTS); ++} ++ ++static void bcm4908_enet_intrs_off(struct bcm4908_enet *enet) ++{ ++ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, 0); ++} ++ ++static void bcm4908_enet_intrs_ack(struct bcm4908_enet *enet) ++{ ++ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_STAT, ENET_DMA_INT_DEFAULTS); ++} ++ ++/*** ++ * DMA ++ */ ++ ++static int bcm4908_dma_alloc_buf_descs(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ int size = ring->length * sizeof(struct bcm4908_enet_dma_ring_bd); ++ struct device *dev = enet->dev; ++ ++ ring->cpu_addr = dma_alloc_coherent(dev, size, &ring->dma_addr, GFP_KERNEL); ++ if (!ring->cpu_addr) ++ return -ENOMEM; ++ ++ if (((uintptr_t)ring->cpu_addr) & (0x40 - 1)) { ++ dev_err(dev, "Invalid DMA ring alignment\n"); ++ goto err_free_buf_descs; ++ } ++ ++ ring->slots = kzalloc(ring->length * sizeof(*ring->slots), GFP_KERNEL); ++ if (!ring->slots) ++ goto err_free_buf_descs; ++ ++ ring->read_idx = 0; ++ ring->write_idx = 0; ++ ++ return 0; ++ ++err_free_buf_descs: ++ dma_free_coherent(dev, size, ring->cpu_addr, ring->dma_addr); ++ return -ENOMEM; ++} ++ ++static void bcm4908_enet_dma_free(struct bcm4908_enet *enet) ++{ ++ struct bcm4908_enet_dma_ring *tx_ring = &enet->tx_ring; ++ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring; ++ struct device *dev = enet->dev; ++ int size; ++ ++ size = rx_ring->length * sizeof(struct bcm4908_enet_dma_ring_bd); ++ if (rx_ring->cpu_addr) ++ dma_free_coherent(dev, size, rx_ring->cpu_addr, rx_ring->dma_addr); ++ kfree(rx_ring->slots); ++ ++ size = tx_ring->length * sizeof(struct bcm4908_enet_dma_ring_bd); ++ if (tx_ring->cpu_addr) ++ dma_free_coherent(dev, size, tx_ring->cpu_addr, tx_ring->dma_addr); ++ kfree(tx_ring->slots); ++} ++ ++static int bcm4908_enet_dma_alloc(struct bcm4908_enet *enet) ++{ ++ struct bcm4908_enet_dma_ring *tx_ring = &enet->tx_ring; ++ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring; ++ struct device *dev = enet->dev; ++ int err; ++ ++ tx_ring->length = ENET_TX_BDS_NUM; ++ tx_ring->is_tx = 1; ++ tx_ring->cfg_block = ENET_DMA_CH_TX_CFG; ++ tx_ring->st_ram_block = ENET_DMA_CH_TX_STATE_RAM; ++ err = bcm4908_dma_alloc_buf_descs(enet, tx_ring); ++ if (err) { ++ dev_err(dev, "Failed to alloc TX buf descriptors: %d\n", err); ++ return err; ++ } ++ ++ rx_ring->length = ENET_RX_BDS_NUM; ++ rx_ring->is_tx = 0; ++ rx_ring->cfg_block = ENET_DMA_CH_RX_CFG; ++ rx_ring->st_ram_block = ENET_DMA_CH_RX_STATE_RAM; ++ err = bcm4908_dma_alloc_buf_descs(enet, rx_ring); ++ if (err) { ++ dev_err(dev, "Failed to alloc RX buf descriptors: %d\n", err); ++ bcm4908_enet_dma_free(enet); ++ return err; ++ } ++ ++ return 0; ++} ++ ++static void bcm4908_enet_dma_reset(struct bcm4908_enet *enet) ++{ ++ struct bcm4908_enet_dma_ring *rings[] = { &enet->rx_ring, &enet->tx_ring }; ++ int i; ++ ++ /* Disable the DMA controller and channel */ ++ for (i = 0; i < ARRAY_SIZE(rings); i++) ++ enet_write(enet, rings[i]->cfg_block + ENET_DMA_CH_CFG, 0); ++ enet_maskset(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_MASTER_EN, 0); ++ ++ /* Reset channels state */ ++ for (i = 0; i < ARRAY_SIZE(rings); i++) { ++ struct bcm4908_enet_dma_ring *ring = rings[i]; ++ ++ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, 0); ++ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_STATE_DATA, 0); ++ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_DESC_LEN_STATUS, 0); ++ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_DESC_BASE_BUFPTR, 0); ++ } ++} ++ ++static int bcm4908_enet_dma_alloc_rx_buf(struct bcm4908_enet *enet, unsigned int idx) ++{ ++ struct bcm4908_enet_dma_ring_bd *buf_desc = &enet->rx_ring.buf_desc[idx]; ++ struct bcm4908_enet_dma_ring_slot *slot = &enet->rx_ring.slots[idx]; ++ struct device *dev = enet->dev; ++ u32 tmp; ++ int err; ++ ++ slot->len = ENET_MTU_MAX + ENET_MTU_MAX_EXTRA_SIZE; ++ ++ slot->skb = netdev_alloc_skb(enet->netdev, slot->len); ++ if (!slot->skb) ++ return -ENOMEM; ++ ++ slot->dma_addr = dma_map_single(dev, slot->skb->data, slot->len, DMA_FROM_DEVICE); ++ err = dma_mapping_error(dev, slot->dma_addr); ++ if (err) { ++ dev_err(dev, "Failed to map DMA buffer: %d\n", err); ++ kfree_skb(slot->skb); ++ slot->skb = NULL; ++ return err; ++ } ++ ++ tmp = slot->len << DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; ++ tmp |= DMA_CTL_STATUS_OWN; ++ if (idx == enet->rx_ring.length - 1) ++ tmp |= DMA_CTL_STATUS_WRAP; ++ buf_desc->ctl = cpu_to_le32(tmp); ++ buf_desc->addr = cpu_to_le32(slot->dma_addr); ++ ++ return 0; ++} ++ ++static void bcm4908_enet_dma_ring_init(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ int reset_channel = 0; /* We support only 1 main channel (with TX and RX) */ ++ int reset_subch = ring->is_tx ? 1 : 0; ++ ++ /* Reset the DMA channel */ ++ enet_write(enet, ENET_DMA_CTRL_CHANNEL_RESET, BIT(reset_channel * 2 + reset_subch)); ++ enet_write(enet, ENET_DMA_CTRL_CHANNEL_RESET, 0); ++ ++ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, 0); ++ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_MAX_BURST, ENET_DMA_MAX_BURST_LEN); ++ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_INT_MASK, 0); ++ ++ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, ++ (uint32_t)ring->dma_addr); ++} ++ ++static void bcm4908_enet_dma_uninit(struct bcm4908_enet *enet) ++{ ++ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring; ++ struct bcm4908_enet_dma_ring_slot *slot; ++ struct device *dev = enet->dev; ++ int i; ++ ++ for (i = rx_ring->length - 1; i >= 0; i--) { ++ slot = &rx_ring->slots[i]; ++ if (!slot->skb) ++ continue; ++ dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_FROM_DEVICE); ++ kfree_skb(slot->skb); ++ slot->skb = NULL; ++ } ++} ++ ++static int bcm4908_enet_dma_init(struct bcm4908_enet *enet) ++{ ++ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring; ++ struct device *dev = enet->dev; ++ int err; ++ int i; ++ ++ for (i = 0; i < rx_ring->length; i++) { ++ err = bcm4908_enet_dma_alloc_rx_buf(enet, i); ++ if (err) { ++ dev_err(dev, "Failed to alloc RX buffer: %d\n", err); ++ bcm4908_enet_dma_uninit(enet); ++ return err; ++ } ++ } ++ ++ bcm4908_enet_dma_ring_init(enet, &enet->tx_ring); ++ bcm4908_enet_dma_ring_init(enet, &enet->rx_ring); ++ ++ return 0; ++} ++ ++static void bcm4908_enet_dma_tx_ring_enable(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE); ++} ++ ++static void bcm4908_enet_dma_tx_ring_disable(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, 0); ++} ++ ++static void bcm4908_enet_dma_rx_ring_enable(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ enet_set(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE); ++} ++ ++static void bcm4908_enet_dma_rx_ring_disable(struct bcm4908_enet *enet, ++ struct bcm4908_enet_dma_ring *ring) ++{ ++ unsigned long deadline; ++ u32 tmp; ++ ++ enet_maskset(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE, 0); ++ ++ deadline = jiffies + usecs_to_jiffies(2000); ++ do { ++ tmp = enet_read(enet, ring->cfg_block + ENET_DMA_CH_CFG); ++ if (!(tmp & ENET_DMA_CH_CFG_ENABLE)) ++ return; ++ enet_maskset(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE, 0); ++ usleep_range(10, 30); ++ } while (!time_after_eq(jiffies, deadline)); ++ ++ dev_warn(enet->dev, "Timeout waiting for DMA TX stop\n"); ++} ++ ++/*** ++ * Ethernet driver ++ */ ++ ++static void bcm4908_enet_gmac_init(struct bcm4908_enet *enet) ++{ ++ u32 cmd; ++ ++ cmd = enet_umac_read(enet, UMAC_CMD); ++ enet_umac_write(enet, UMAC_CMD, cmd | CMD_SW_RESET); ++ enet_umac_write(enet, UMAC_CMD, cmd & ~CMD_SW_RESET); ++ ++ enet_set(enet, ENET_FLUSH, ENET_FLUSH_RXFIFO_FLUSH | ENET_FLUSH_TXFIFO_FLUSH); ++ enet_maskset(enet, ENET_FLUSH, ENET_FLUSH_RXFIFO_FLUSH | ENET_FLUSH_TXFIFO_FLUSH, 0); ++ ++ enet_set(enet, ENET_MIB_CTRL, ENET_MIB_CTRL_CLR_MIB); ++ enet_maskset(enet, ENET_MIB_CTRL, ENET_MIB_CTRL_CLR_MIB, 0); ++ ++ cmd = enet_umac_read(enet, UMAC_CMD); ++ cmd &= ~(CMD_SPEED_MASK << CMD_SPEED_SHIFT); ++ cmd &= ~CMD_TX_EN; ++ cmd &= ~CMD_RX_EN; ++ cmd |= CMD_SPEED_1000 << CMD_SPEED_SHIFT; ++ enet_umac_write(enet, UMAC_CMD, cmd); ++ ++ enet_maskset(enet, ENET_GMAC_STATUS, ++ ENET_GMAC_STATUS_ETH_SPEED_MASK | ++ ENET_GMAC_STATUS_HD | ++ ENET_GMAC_STATUS_AUTO_CFG_EN | ++ ENET_GMAC_STATUS_LINK_UP, ++ ENET_GMAC_STATUS_ETH_SPEED_1000 | ++ ENET_GMAC_STATUS_AUTO_CFG_EN | ++ ENET_GMAC_STATUS_LINK_UP); ++} ++ ++static irqreturn_t bcm4908_enet_irq_handler(int irq, void *dev_id) ++{ ++ struct bcm4908_enet *enet = dev_id; ++ ++ bcm4908_enet_intrs_off(enet); ++ bcm4908_enet_intrs_ack(enet); ++ ++ napi_schedule(&enet->napi); ++ ++ return IRQ_HANDLED; ++} ++ ++static int bcm4908_enet_open(struct net_device *netdev) ++{ ++ struct bcm4908_enet *enet = netdev_priv(netdev); ++ struct device *dev = enet->dev; ++ int err; ++ ++ err = request_irq(netdev->irq, bcm4908_enet_irq_handler, 0, "enet", enet); ++ if (err) { ++ dev_err(dev, "Failed to request IRQ %d: %d\n", netdev->irq, err); ++ return err; ++ } ++ ++ bcm4908_enet_gmac_init(enet); ++ bcm4908_enet_dma_reset(enet); ++ bcm4908_enet_dma_init(enet); ++ ++ enet_umac_set(enet, UMAC_CMD, CMD_TX_EN | CMD_RX_EN); ++ ++ enet_set(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_MASTER_EN); ++ enet_maskset(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_FLOWC_CH1_EN, 0); ++ bcm4908_enet_dma_rx_ring_enable(enet, &enet->rx_ring); ++ ++ napi_enable(&enet->napi); ++ netif_carrier_on(netdev); ++ netif_start_queue(netdev); ++ ++ bcm4908_enet_intrs_ack(enet); ++ bcm4908_enet_intrs_on(enet); ++ ++ return 0; ++} ++ ++static int bcm4908_enet_stop(struct net_device *netdev) ++{ ++ struct bcm4908_enet *enet = netdev_priv(netdev); ++ ++ netif_stop_queue(netdev); ++ netif_carrier_off(netdev); ++ napi_disable(&enet->napi); ++ ++ bcm4908_enet_dma_rx_ring_disable(enet, &enet->rx_ring); ++ bcm4908_enet_dma_tx_ring_disable(enet, &enet->tx_ring); ++ ++ bcm4908_enet_dma_uninit(enet); ++ ++ free_irq(enet->netdev->irq, enet); ++ ++ return 0; ++} ++ ++static int bcm4908_enet_start_xmit(struct sk_buff *skb, struct net_device *netdev) ++{ ++ struct bcm4908_enet *enet = netdev_priv(netdev); ++ struct bcm4908_enet_dma_ring *ring = &enet->tx_ring; ++ struct bcm4908_enet_dma_ring_slot *slot; ++ struct device *dev = enet->dev; ++ struct bcm4908_enet_dma_ring_bd *buf_desc; ++ int free_buf_descs; ++ u32 tmp; ++ ++ /* Free transmitted skbs */ ++ while (ring->read_idx != ring->write_idx) { ++ buf_desc = &ring->buf_desc[ring->read_idx]; ++ if (le32_to_cpu(buf_desc->ctl) & DMA_CTL_STATUS_OWN) ++ break; ++ slot = &ring->slots[ring->read_idx]; ++ ++ dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_TO_DEVICE); ++ dev_kfree_skb(slot->skb); ++ if (++ring->read_idx == ring->length) ++ ring->read_idx = 0; ++ } ++ ++ /* Don't use the last empty buf descriptor */ ++ if (ring->read_idx <= ring->write_idx) ++ free_buf_descs = ring->read_idx - ring->write_idx + ring->length; ++ else ++ free_buf_descs = ring->read_idx - ring->write_idx; ++ if (free_buf_descs < 2) ++ return NETDEV_TX_BUSY; ++ ++ /* Hardware removes OWN bit after sending data */ ++ buf_desc = &ring->buf_desc[ring->write_idx]; ++ if (unlikely(le32_to_cpu(buf_desc->ctl) & DMA_CTL_STATUS_OWN)) { ++ netif_stop_queue(netdev); ++ return NETDEV_TX_BUSY; ++ } ++ ++ slot = &ring->slots[ring->write_idx]; ++ slot->skb = skb; ++ slot->len = skb->len; ++ slot->dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); ++ if (unlikely(dma_mapping_error(dev, slot->dma_addr))) ++ return NETDEV_TX_BUSY; ++ ++ tmp = skb->len << DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; ++ tmp |= DMA_CTL_STATUS_OWN; ++ tmp |= DMA_CTL_STATUS_SOP; ++ tmp |= DMA_CTL_STATUS_EOP; ++ tmp |= DMA_CTL_STATUS_APPEND_CRC; ++ if (ring->write_idx + 1 == ring->length - 1) ++ tmp |= DMA_CTL_STATUS_WRAP; ++ ++ buf_desc->addr = cpu_to_le32((uint32_t)slot->dma_addr); ++ buf_desc->ctl = cpu_to_le32(tmp); ++ ++ bcm4908_enet_dma_tx_ring_enable(enet, &enet->tx_ring); ++ ++ if (++ring->write_idx == ring->length - 1) ++ ring->write_idx = 0; ++ enet->netdev->stats.tx_bytes += skb->len; ++ enet->netdev->stats.tx_packets++; ++ ++ return NETDEV_TX_OK; ++} ++ ++static int bcm4908_enet_poll(struct napi_struct *napi, int weight) ++{ ++ struct bcm4908_enet *enet = container_of(napi, struct bcm4908_enet, napi); ++ struct device *dev = enet->dev; ++ int handled = 0; ++ ++ while (handled < weight) { ++ struct bcm4908_enet_dma_ring_bd *buf_desc; ++ struct bcm4908_enet_dma_ring_slot slot; ++ u32 ctl; ++ int len; ++ int err; ++ ++ buf_desc = &enet->rx_ring.buf_desc[enet->rx_ring.read_idx]; ++ ctl = le32_to_cpu(buf_desc->ctl); ++ if (ctl & DMA_CTL_STATUS_OWN) ++ break; ++ ++ slot = enet->rx_ring.slots[enet->rx_ring.read_idx]; ++ ++ /* Provide new buffer before unpinning the old one */ ++ err = bcm4908_enet_dma_alloc_rx_buf(enet, enet->rx_ring.read_idx); ++ if (err) ++ break; ++ ++ if (++enet->rx_ring.read_idx == enet->rx_ring.length) ++ enet->rx_ring.read_idx = 0; ++ ++ len = (ctl & DMA_CTL_LEN_DESC_BUFLENGTH) >> DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; ++ ++ if (len < ENET_MTU_MIN || ++ (ctl & (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) != (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) { ++ kfree(slot.skb); ++ enet->netdev->stats.rx_dropped++; ++ break; ++ } ++ ++ dma_unmap_single(dev, slot.dma_addr, slot.len, DMA_FROM_DEVICE); ++ ++ skb_put(slot.skb, len - ETH_FCS_LEN); ++ slot.skb->protocol = eth_type_trans(slot.skb, enet->netdev); ++ netif_receive_skb(slot.skb); ++ ++ enet->netdev->stats.rx_packets++; ++ enet->netdev->stats.rx_bytes += len; ++ } ++ ++ if (handled < weight) { ++ napi_complete_done(napi, handled); ++ bcm4908_enet_intrs_on(enet); ++ } ++ ++ return handled; ++} ++ ++static const struct net_device_ops bcm4908_enet_netdev_ops = { ++ .ndo_open = bcm4908_enet_open, ++ .ndo_stop = bcm4908_enet_stop, ++ .ndo_start_xmit = bcm4908_enet_start_xmit, ++ .ndo_set_mac_address = eth_mac_addr, ++}; ++ ++static int bcm4908_enet_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct net_device *netdev; ++ struct bcm4908_enet *enet; ++ int err; ++ ++ netdev = devm_alloc_etherdev(dev, sizeof(*enet)); ++ if (!netdev) ++ return -ENOMEM; ++ ++ enet = netdev_priv(netdev); ++ enet->dev = dev; ++ enet->netdev = netdev; ++ ++ enet->base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(enet->base)) { ++ dev_err(dev, "Failed to map registers: %ld\n", PTR_ERR(enet->base)); ++ return PTR_ERR(enet->base); ++ } ++ ++ netdev->irq = platform_get_irq(pdev, 0); ++ if (netdev->irq < 0) ++ return netdev->irq; ++ ++ dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); ++ ++ err = bcm4908_enet_dma_alloc(enet); ++ if (err) ++ return err; ++ ++ SET_NETDEV_DEV(netdev, &pdev->dev); ++ eth_hw_addr_random(netdev); ++ netdev->netdev_ops = &bcm4908_enet_netdev_ops; ++ netdev->min_mtu = ETH_ZLEN; ++ netdev->mtu = ENET_MTU_MAX; ++ netdev->max_mtu = ENET_MTU_MAX; ++ netif_napi_add(netdev, &enet->napi, bcm4908_enet_poll, 64); ++ ++ err = register_netdev(netdev); ++ if (err) { ++ bcm4908_enet_dma_free(enet); ++ return err; ++ } ++ ++ platform_set_drvdata(pdev, enet); ++ ++ return 0; ++} ++ ++static int bcm4908_enet_remove(struct platform_device *pdev) ++{ ++ struct bcm4908_enet *enet = platform_get_drvdata(pdev); ++ ++ unregister_netdev(enet->netdev); ++ netif_napi_del(&enet->napi); ++ bcm4908_enet_dma_free(enet); ++ ++ return 0; ++} ++ ++static const struct of_device_id bcm4908_enet_of_match[] = { ++ { .compatible = "brcm,bcm4908-enet"}, ++ {}, ++}; ++ ++static struct platform_driver bcm4908_enet_driver = { ++ .driver = { ++ .name = "bcm4908_enet", ++ .of_match_table = bcm4908_enet_of_match, ++ }, ++ .probe = bcm4908_enet_probe, ++ .remove = bcm4908_enet_remove, ++}; ++module_platform_driver(bcm4908_enet_driver); ++ ++MODULE_LICENSE("GPL v2"); ++MODULE_DEVICE_TABLE(of, bcm4908_enet_of_match); +--- /dev/null ++++ b/drivers/net/ethernet/broadcom/bcm4908_enet.h +@@ -0,0 +1,96 @@ ++/* SPDX-License-Identifier: GPL-2.0-only */ ++#ifndef __BCM4908_ENET_H ++#define __BCM4908_ENET_H ++ ++#define ENET_CONTROL 0x000 ++#define ENET_MIB_CTRL 0x004 ++#define ENET_MIB_CTRL_CLR_MIB 0x00000001 ++#define ENET_RX_ERR_MASK 0x008 ++#define ENET_MIB_MAX_PKT_SIZE 0x00C ++#define ENET_MIB_MAX_PKT_SIZE_VAL 0x00003fff ++#define ENET_DIAG_OUT 0x01c ++#define ENET_ENABLE_DROP_PKT 0x020 ++#define ENET_IRQ_ENABLE 0x024 ++#define ENET_IRQ_ENABLE_OVFL 0x00000001 ++#define ENET_GMAC_STATUS 0x028 ++#define ENET_GMAC_STATUS_ETH_SPEED_MASK 0x00000003 ++#define ENET_GMAC_STATUS_ETH_SPEED_10 0x00000000 ++#define ENET_GMAC_STATUS_ETH_SPEED_100 0x00000001 ++#define ENET_GMAC_STATUS_ETH_SPEED_1000 0x00000002 ++#define ENET_GMAC_STATUS_HD 0x00000004 ++#define ENET_GMAC_STATUS_AUTO_CFG_EN 0x00000008 ++#define ENET_GMAC_STATUS_LINK_UP 0x00000010 ++#define ENET_IRQ_STATUS 0x02c ++#define ENET_IRQ_STATUS_OVFL 0x00000001 ++#define ENET_OVERFLOW_COUNTER 0x030 ++#define ENET_FLUSH 0x034 ++#define ENET_FLUSH_RXFIFO_FLUSH 0x00000001 ++#define ENET_FLUSH_TXFIFO_FLUSH 0x00000002 ++#define ENET_RSV_SELECT 0x038 ++#define ENET_BP_FORCE 0x03c ++#define ENET_BP_FORCE_FORCE 0x00000001 ++#define ENET_DMA_RX_OK_TO_SEND_COUNT 0x040 ++#define ENET_DMA_RX_OK_TO_SEND_COUNT_VAL 0x0000000f ++#define ENET_TX_CRC_CTRL 0x044 ++#define ENET_MIB 0x200 ++#define ENET_UNIMAC 0x400 ++#define ENET_DMA 0x800 ++#define ENET_DMA_CONTROLLER_CFG 0x800 ++#define ENET_DMA_CTRL_CFG_MASTER_EN 0x00000001 ++#define ENET_DMA_CTRL_CFG_FLOWC_CH1_EN 0x00000002 ++#define ENET_DMA_CTRL_CFG_FLOWC_CH3_EN 0x00000004 ++#define ENET_DMA_FLOWCTL_CH1_THRESH_LO 0x804 ++#define ENET_DMA_FLOWCTL_CH1_THRESH_HI 0x808 ++#define ENET_DMA_FLOWCTL_CH1_ALLOC 0x80c ++#define ENET_DMA_FLOWCTL_CH1_ALLOC_FORCE 0x80000000 ++#define ENET_DMA_FLOWCTL_CH3_THRESH_LO 0x810 ++#define ENET_DMA_FLOWCTL_CH3_THRESH_HI 0x814 ++#define ENET_DMA_FLOWCTL_CH3_ALLOC 0x818 ++#define ENET_DMA_FLOWCTL_CH5_THRESH_LO 0x81C ++#define ENET_DMA_FLOWCTL_CH5_THRESH_HI 0x820 ++#define ENET_DMA_FLOWCTL_CH5_ALLOC 0x824 ++#define ENET_DMA_FLOWCTL_CH7_THRESH_LO 0x828 ++#define ENET_DMA_FLOWCTL_CH7_THRESH_HI 0x82C ++#define ENET_DMA_FLOWCTL_CH7_ALLOC 0x830 ++#define ENET_DMA_CTRL_CHANNEL_RESET 0x834 ++#define ENET_DMA_CTRL_CHANNEL_DEBUG 0x838 ++#define ENET_DMA_CTRL_GLOBAL_INTERRUPT_STATUS 0x840 ++#define ENET_DMA_CTRL_GLOBAL_INTERRUPT_MASK 0x844 ++#define ENET_DMA_CH0_CFG 0xa00 /* RX */ ++#define ENET_DMA_CH1_CFG 0xa10 /* TX */ ++#define ENET_DMA_CH0_STATE_RAM 0xc00 /* RX */ ++#define ENET_DMA_CH1_STATE_RAM 0xc10 /* TX */ ++ ++#define ENET_DMA_CH_CFG 0x00 /* assorted configuration */ ++#define ENET_DMA_CH_CFG_ENABLE 0x00000001 /* set to enable channel */ ++#define ENET_DMA_CH_CFG_PKT_HALT 0x00000002 /* idle after an EOP flag is detected */ ++#define ENET_DMA_CH_CFG_BURST_HALT 0x00000004 /* idle after finish current memory burst */ ++#define ENET_DMA_CH_CFG_INT_STAT 0x04 /* interrupts control and status */ ++#define ENET_DMA_CH_CFG_INT_MASK 0x08 /* interrupts mask */ ++#define ENET_DMA_CH_CFG_INT_BUFF_DONE 0x00000001 /* buffer done */ ++#define ENET_DMA_CH_CFG_INT_DONE 0x00000002 /* packet xfer complete */ ++#define ENET_DMA_CH_CFG_INT_NO_DESC 0x00000004 /* no valid descriptors */ ++#define ENET_DMA_CH_CFG_INT_RX_ERROR 0x00000008 /* rxdma detect client protocol error */ ++#define ENET_DMA_CH_CFG_MAX_BURST 0x0c /* max burst length permitted */ ++#define ENET_DMA_CH_CFG_MAX_BURST_DESCSIZE_SEL 0x00040000 /* DMA Descriptor Size Selection */ ++#define ENET_DMA_CH_CFG_SIZE 0x10 ++ ++#define ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR 0x00 /* descriptor ring start address */ ++#define ENET_DMA_CH_STATE_RAM_STATE_DATA 0x04 /* state/bytes done/ring offset */ ++#define ENET_DMA_CH_STATE_RAM_DESC_LEN_STATUS 0x08 /* buffer descriptor status and len */ ++#define ENET_DMA_CH_STATE_RAM_DESC_BASE_BUFPTR 0x0c /* buffer descrpitor current processing */ ++#define ENET_DMA_CH_STATE_RAM_SIZE 0x10 ++ ++#define DMA_CTL_STATUS_APPEND_CRC 0x00000100 ++#define DMA_CTL_STATUS_APPEND_BRCM_TAG 0x00000200 ++#define DMA_CTL_STATUS_PRIO 0x00000C00 /* Prio for Tx */ ++#define DMA_CTL_STATUS_WRAP 0x00001000 /* */ ++#define DMA_CTL_STATUS_SOP 0x00002000 /* first buffer in packet */ ++#define DMA_CTL_STATUS_EOP 0x00004000 /* last buffer in packet */ ++#define DMA_CTL_STATUS_OWN 0x00008000 /* cleared by DMA, set by SW */ ++#define DMA_CTL_LEN_DESC_BUFLENGTH 0x0fff0000 ++#define DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT 16 ++#define DMA_CTL_LEN_DESC_MULTICAST 0x40000000 ++#define DMA_CTL_LEN_DESC_USEFPM 0x80000000 ++ ++#endif diff --git a/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908enet-add-BCM4908-controller-driv.patch b/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908enet-add-BCM4908-controller-driv.patch deleted file mode 100644 index 5b2084e80c..0000000000 --- a/target/linux/bcm4908/patches-5.4/170-0002-net-broadcom-bcm4908enet-add-BCM4908-controller-driv.patch +++ /dev/null @@ -1,842 +0,0 @@ -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= -Date: Fri, 5 Feb 2021 21:59:51 +0100 -Subject: [PATCH 2/2] net: broadcom: bcm4908enet: add BCM4908 controller driver - -BCM4908 SoCs family uses Ethernel controller that includes UniMAC but -uses different DMA engine (than other controllers) and requires -different programming. - -Signed-off-by: Rafał Miłecki ---- - MAINTAINERS | 9 + - drivers/net/ethernet/broadcom/Kconfig | 8 + - drivers/net/ethernet/broadcom/Makefile | 1 + - drivers/net/ethernet/broadcom/bcm4908enet.c | 676 ++++++++++++++++++++ - drivers/net/ethernet/broadcom/bcm4908enet.h | 96 +++ - 5 files changed, 790 insertions(+) - create mode 100644 drivers/net/ethernet/broadcom/bcm4908enet.c - create mode 100644 drivers/net/ethernet/broadcom/bcm4908enet.h - ---- a/MAINTAINERS -+++ b/MAINTAINERS -@@ -3207,6 +3207,15 @@ F: Documentation/devicetree/bindings/mip - F: arch/mips/bcm47xx/* - F: arch/mips/include/asm/mach-bcm47xx/* - -+BROADCOM BCM4908 ETHERNET DRIVER -+M: Rafał Miłecki -+M: bcm-kernel-feedback-list@broadcom.com -+L: netdev@vger.kernel.org -+S: Maintained -+F: Documentation/devicetree/bindings/net/brcm,bcm4908enet.yaml -+F: drivers/net/ethernet/broadcom/bcm4908enet.* -+F: drivers/net/ethernet/broadcom/unimac.h -+ - BROADCOM BCM5301X ARM ARCHITECTURE - M: Hauke Mehrtens - M: Rafał Miłecki ---- a/drivers/net/ethernet/broadcom/Kconfig -+++ b/drivers/net/ethernet/broadcom/Kconfig -@@ -51,6 +51,14 @@ config B44_PCI - depends on B44_PCI_AUTOSELECT && B44_PCICORE_AUTOSELECT - default y - -+config BCM4908ENET -+ tristate "Broadcom BCM4908 internal mac support" -+ depends on ARCH_BCM4908 || COMPILE_TEST -+ default y -+ help -+ This driver supports Ethernet controller integrated into Broadcom -+ BCM4908 family SoCs. -+ - config BCM63XX_ENET - tristate "Broadcom 63xx internal mac support" - depends on BCM63XX ---- a/drivers/net/ethernet/broadcom/Makefile -+++ b/drivers/net/ethernet/broadcom/Makefile -@@ -4,6 +4,7 @@ - # - - obj-$(CONFIG_B44) += b44.o -+obj-$(CONFIG_BCM4908ENET) += bcm4908enet.o - obj-$(CONFIG_BCM63XX_ENET) += bcm63xx_enet.o - obj-$(CONFIG_BCMGENET) += genet/ - obj-$(CONFIG_BNX2) += bnx2.o ---- /dev/null -+++ b/drivers/net/ethernet/broadcom/bcm4908enet.c -@@ -0,0 +1,676 @@ -+// SPDX-License-Identifier: GPL-2.0-only -+/* -+ * Copyright (C) 2021 Rafał Miłecki -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#include "bcm4908enet.h" -+#include "unimac.h" -+ -+#define ENET_DMA_CH_RX_CFG ENET_DMA_CH0_CFG -+#define ENET_DMA_CH_TX_CFG ENET_DMA_CH1_CFG -+#define ENET_DMA_CH_RX_STATE_RAM ENET_DMA_CH0_STATE_RAM -+#define ENET_DMA_CH_TX_STATE_RAM ENET_DMA_CH1_STATE_RAM -+ -+#define ENET_TX_BDS_NUM 200 -+#define ENET_RX_BDS_NUM 200 -+#define ENET_RX_BDS_NUM_MAX 8192 -+ -+#define ENET_DMA_INT_DEFAULTS (ENET_DMA_CH_CFG_INT_DONE | \ -+ ENET_DMA_CH_CFG_INT_NO_DESC | \ -+ ENET_DMA_CH_CFG_INT_BUFF_DONE) -+#define ENET_DMA_MAX_BURST_LEN 8 /* in 64 bit words */ -+ -+#define ENET_MTU_MIN 60 -+#define ENET_MTU_MAX 1500 /* Is it possible to support 2044? */ -+#define ENET_MTU_MAX_EXTRA_SIZE 32 /* L2 */ -+ -+struct bcm4908enet_dma_ring_bd { -+ __le32 ctl; -+ __le32 addr; -+} __packed; -+ -+struct bcm4908enet_dma_ring_slot { -+ struct sk_buff *skb; -+ unsigned int len; -+ dma_addr_t dma_addr; -+}; -+ -+struct bcm4908enet_dma_ring { -+ int is_tx; -+ int read_idx; -+ int write_idx; -+ int length; -+ u16 cfg_block; -+ u16 st_ram_block; -+ -+ union { -+ void *cpu_addr; -+ struct bcm4908enet_dma_ring_bd *buf_desc; -+ }; -+ dma_addr_t dma_addr; -+ -+ struct bcm4908enet_dma_ring_slot *slots; -+}; -+ -+struct bcm4908enet { -+ struct device *dev; -+ struct net_device *netdev; -+ struct napi_struct napi; -+ void __iomem *base; -+ -+ struct bcm4908enet_dma_ring tx_ring; -+ struct bcm4908enet_dma_ring rx_ring; -+}; -+ -+/*** -+ * R/W ops -+ */ -+ -+static inline u32 enet_read(struct bcm4908enet *enet, u16 offset) -+{ -+ return readl(enet->base + offset); -+} -+ -+static inline void enet_write(struct bcm4908enet *enet, u16 offset, u32 value) -+{ -+ writel(value, enet->base + offset); -+} -+ -+static inline void enet_maskset(struct bcm4908enet *enet, u16 offset, u32 mask, u32 set) -+{ -+ u32 val; -+ -+ WARN_ON(set & ~mask); -+ -+ val = enet_read(enet, offset); -+ val = (val & ~mask) | (set & mask); -+ enet_write(enet, offset, val); -+} -+ -+static inline void enet_set(struct bcm4908enet *enet, u16 offset, u32 set) -+{ -+ enet_maskset(enet, offset, set, set); -+} -+ -+static inline u32 enet_umac_read(struct bcm4908enet *enet, u16 offset) -+{ -+ return enet_read(enet, ENET_UNIMAC + offset); -+} -+ -+static inline void enet_umac_write(struct bcm4908enet *enet, u16 offset, u32 value) -+{ -+ enet_write(enet, ENET_UNIMAC + offset, value); -+} -+ -+static inline void enet_umac_maskset(struct bcm4908enet *enet, u16 offset, u32 mask, u32 set) -+{ -+ enet_maskset(enet, ENET_UNIMAC + offset, mask, set); -+} -+ -+static inline void enet_umac_set(struct bcm4908enet *enet, u16 offset, u32 set) -+{ -+ enet_set(enet, ENET_UNIMAC + offset, set); -+} -+ -+/*** -+ * Helpers -+ */ -+ -+static void bcm4908enet_intrs_on(struct bcm4908enet *enet) -+{ -+ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, ENET_DMA_INT_DEFAULTS); -+} -+ -+static void bcm4908enet_intrs_off(struct bcm4908enet *enet) -+{ -+ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, 0); -+} -+ -+static void bcm4908enet_intrs_ack(struct bcm4908enet *enet) -+{ -+ enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_STAT, ENET_DMA_INT_DEFAULTS); -+} -+ -+/*** -+ * DMA -+ */ -+ -+static int bcm4908_dma_alloc_buf_descs(struct bcm4908enet *enet, struct bcm4908enet_dma_ring *ring) -+{ -+ int size = ring->length * sizeof(struct bcm4908enet_dma_ring_bd); -+ struct device *dev = enet->dev; -+ -+ ring->cpu_addr = dma_alloc_coherent(dev, size, &ring->dma_addr, GFP_KERNEL); -+ if (!ring->cpu_addr) -+ return -ENOMEM; -+ -+ if (((uintptr_t)ring->cpu_addr) & (0x40 - 1)) { -+ dev_err(dev, "Invalid DMA ring alignment\n"); -+ goto err_free_buf_descs; -+ } -+ -+ ring->slots = kzalloc(ring->length * sizeof(*ring->slots), GFP_KERNEL); -+ if (!ring->slots) -+ goto err_free_buf_descs; -+ -+ memset(ring->cpu_addr, 0, size); -+ -+ ring->read_idx = 0; -+ ring->write_idx = 0; -+ -+ return 0; -+ -+err_free_buf_descs: -+ dma_free_coherent(dev, size, ring->cpu_addr, ring->dma_addr); -+ return -ENOMEM; -+} -+ -+static void bcm4908enet_dma_free(struct bcm4908enet *enet) -+{ -+ struct bcm4908enet_dma_ring *tx_ring = &enet->tx_ring; -+ struct bcm4908enet_dma_ring *rx_ring = &enet->rx_ring; -+ struct device *dev = enet->dev; -+ int size; -+ -+ size = rx_ring->length * sizeof(struct bcm4908enet_dma_ring_bd); -+ if (rx_ring->cpu_addr) -+ dma_free_coherent(dev, size, rx_ring->cpu_addr, rx_ring->dma_addr); -+ kfree(rx_ring->slots); -+ -+ size = tx_ring->length * sizeof(struct bcm4908enet_dma_ring_bd); -+ if (tx_ring->cpu_addr) -+ dma_free_coherent(dev, size, tx_ring->cpu_addr, tx_ring->dma_addr); -+ kfree(tx_ring->slots); -+} -+ -+static int bcm4908enet_dma_alloc(struct bcm4908enet *enet) -+{ -+ struct bcm4908enet_dma_ring *tx_ring = &enet->tx_ring; -+ struct bcm4908enet_dma_ring *rx_ring = &enet->rx_ring; -+ struct device *dev = enet->dev; -+ int err; -+ -+ tx_ring->length = ENET_TX_BDS_NUM; -+ tx_ring->is_tx = 1; -+ tx_ring->cfg_block = ENET_DMA_CH_TX_CFG; -+ tx_ring->st_ram_block = ENET_DMA_CH_TX_STATE_RAM; -+ err = bcm4908_dma_alloc_buf_descs(enet, tx_ring); -+ if (err) { -+ dev_err(dev, "Failed to alloc TX buf descriptors: %d\n", err); -+ return err; -+ } -+ -+ rx_ring->length = ENET_RX_BDS_NUM; -+ rx_ring->is_tx = 0; -+ rx_ring->cfg_block = ENET_DMA_CH_RX_CFG; -+ rx_ring->st_ram_block = ENET_DMA_CH_RX_STATE_RAM; -+ err = bcm4908_dma_alloc_buf_descs(enet, rx_ring); -+ if (err) { -+ dev_err(dev, "Failed to alloc RX buf descriptors: %d\n", err); -+ bcm4908enet_dma_free(enet); -+ return err; -+ } -+ -+ return 0; -+} -+ -+static void bcm4908enet_dma_reset(struct bcm4908enet *enet) -+{ -+ struct bcm4908enet_dma_ring *rings[] = { &enet->rx_ring, &enet->tx_ring }; -+ int i; -+ -+ /* Disable the DMA controller and channel */ -+ for (i = 0; i < ARRAY_SIZE(rings); i++) -+ enet_write(enet, rings[i]->cfg_block + ENET_DMA_CH_CFG, 0); -+ enet_maskset(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_MASTER_EN, 0); -+ -+ /* Reset channels state */ -+ for (i = 0; i < ARRAY_SIZE(rings); i++) { -+ struct bcm4908enet_dma_ring *ring = rings[i]; -+ -+ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, 0); -+ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_STATE_DATA, 0); -+ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_DESC_LEN_STATUS, 0); -+ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_DESC_BASE_BUFPTR, 0); -+ } -+} -+ -+static int bcm4908enet_dma_alloc_rx_buf(struct bcm4908enet *enet, unsigned int idx) -+{ -+ struct bcm4908enet_dma_ring_bd *buf_desc = &enet->rx_ring.buf_desc[idx]; -+ struct bcm4908enet_dma_ring_slot *slot = &enet->rx_ring.slots[idx]; -+ struct device *dev = enet->dev; -+ u32 tmp; -+ int err; -+ -+ slot->len = ENET_MTU_MAX + ENET_MTU_MAX_EXTRA_SIZE; -+ -+ slot->skb = netdev_alloc_skb(enet->netdev, slot->len); -+ if (!slot->skb) -+ return -ENOMEM; -+ -+ slot->dma_addr = dma_map_single(dev, slot->skb->data, slot->len, DMA_FROM_DEVICE); -+ err = dma_mapping_error(dev, slot->dma_addr); -+ if (err) { -+ dev_err(dev, "Failed to map DMA buffer: %d\n", err); -+ kfree_skb(slot->skb); -+ slot->skb = NULL; -+ return err; -+ } -+ -+ tmp = slot->len << DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; -+ tmp |= DMA_CTL_STATUS_OWN; -+ if (idx == enet->rx_ring.length - 1) -+ tmp |= DMA_CTL_STATUS_WRAP; -+ buf_desc->ctl = cpu_to_le32(tmp); -+ buf_desc->addr = cpu_to_le32(slot->dma_addr); -+ -+ return 0; -+} -+ -+static void bcm4908enet_dma_ring_init(struct bcm4908enet *enet, -+ struct bcm4908enet_dma_ring *ring) -+{ -+ int reset_channel = 0; /* We support only 1 main channel (with TX and RX) */ -+ int reset_subch = ring->is_tx ? 1 : 0; -+ -+ /* Reset the DMA channel */ -+ enet_write(enet, ENET_DMA_CTRL_CHANNEL_RESET, BIT(reset_channel * 2 + reset_subch)); -+ enet_write(enet, ENET_DMA_CTRL_CHANNEL_RESET, 0); -+ -+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, 0); -+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_MAX_BURST, ENET_DMA_MAX_BURST_LEN); -+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_INT_MASK, 0); -+ -+ enet_write(enet, ring->st_ram_block + ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR, -+ (uint32_t)ring->dma_addr); -+} -+ -+static void bcm4908enet_dma_uninit(struct bcm4908enet *enet) -+{ -+ struct bcm4908enet_dma_ring *rx_ring = &enet->rx_ring; -+ struct bcm4908enet_dma_ring_slot *slot; -+ struct device *dev = enet->dev; -+ int i; -+ -+ for (i = rx_ring->length - 1; i >= 0; i--) { -+ slot = &rx_ring->slots[i]; -+ if (!slot->skb) -+ continue; -+ dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_FROM_DEVICE); -+ kfree_skb(slot->skb); -+ slot->skb = NULL; -+ } -+} -+ -+static int bcm4908enet_dma_init(struct bcm4908enet *enet) -+{ -+ struct bcm4908enet_dma_ring *rx_ring = &enet->rx_ring; -+ struct device *dev = enet->dev; -+ int err; -+ int i; -+ -+ for (i = 0; i < rx_ring->length; i++) { -+ err = bcm4908enet_dma_alloc_rx_buf(enet, i); -+ if (err) { -+ dev_err(dev, "Failed to alloc RX buffer: %d\n", err); -+ bcm4908enet_dma_uninit(enet); -+ return err; -+ } -+ } -+ -+ bcm4908enet_dma_ring_init(enet, &enet->tx_ring); -+ bcm4908enet_dma_ring_init(enet, &enet->rx_ring); -+ -+ return 0; -+} -+ -+static void bcm4908enet_dma_tx_ring_ensable(struct bcm4908enet *enet, -+ struct bcm4908enet_dma_ring *ring) -+{ -+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE); -+} -+ -+static void bcm4908enet_dma_tx_ring_disable(struct bcm4908enet *enet, -+ struct bcm4908enet_dma_ring *ring) -+{ -+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG, 0); -+} -+ -+static void bcm4908enet_dma_rx_ring_enable(struct bcm4908enet *enet, -+ struct bcm4908enet_dma_ring *ring) -+{ -+ enet_set(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE); -+} -+ -+static void bcm4908enet_dma_rx_ring_disable(struct bcm4908enet *enet, -+ struct bcm4908enet_dma_ring *ring) -+{ -+ unsigned long deadline; -+ u32 tmp; -+ -+ enet_maskset(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE, 0); -+ -+ deadline = jiffies + usecs_to_jiffies(2000); -+ do { -+ tmp = enet_read(enet, ring->cfg_block + ENET_DMA_CH_CFG); -+ if (!(tmp & ENET_DMA_CH_CFG_ENABLE)) -+ return; -+ enet_maskset(enet, ring->cfg_block + ENET_DMA_CH_CFG, ENET_DMA_CH_CFG_ENABLE, 0); -+ usleep_range(10, 30); -+ } while (!time_after_eq(jiffies, deadline)); -+ -+ dev_warn(enet->dev, "Timeout waiting for DMA TX stop\n"); -+} -+ -+/*** -+ * Ethernet driver -+ */ -+ -+static void bcm4908enet_gmac_init(struct bcm4908enet *enet) -+{ -+ u32 cmd; -+ -+ cmd = enet_umac_read(enet, UMAC_CMD); -+ enet_umac_write(enet, UMAC_CMD, cmd | CMD_SW_RESET); -+ enet_umac_write(enet, UMAC_CMD, cmd & ~CMD_SW_RESET); -+ -+ enet_set(enet, ENET_FLUSH, ENET_FLUSH_RXFIFO_FLUSH | ENET_FLUSH_TXFIFO_FLUSH); -+ enet_maskset(enet, ENET_FLUSH, ENET_FLUSH_RXFIFO_FLUSH | ENET_FLUSH_TXFIFO_FLUSH, 0); -+ -+ enet_set(enet, ENET_MIB_CTRL, ENET_MIB_CTRL_CLR_MIB); -+ enet_maskset(enet, ENET_MIB_CTRL, ENET_MIB_CTRL_CLR_MIB, 0); -+ -+ cmd = enet_umac_read(enet, UMAC_CMD); -+ cmd &= ~(CMD_SPEED_MASK << CMD_SPEED_SHIFT); -+ cmd &= ~CMD_TX_EN; -+ cmd &= ~CMD_RX_EN; -+ cmd |= CMD_SPEED_1000 << CMD_SPEED_SHIFT; -+ enet_umac_write(enet, UMAC_CMD, cmd); -+ -+ enet_maskset(enet, ENET_GMAC_STATUS, -+ ENET_GMAC_STATUS_ETH_SPEED_MASK | -+ ENET_GMAC_STATUS_HD | -+ ENET_GMAC_STATUS_AUTO_CFG_EN | -+ ENET_GMAC_STATUS_LINK_UP, -+ ENET_GMAC_STATUS_ETH_SPEED_1000 | -+ ENET_GMAC_STATUS_AUTO_CFG_EN | -+ ENET_GMAC_STATUS_LINK_UP); -+} -+ -+static irqreturn_t bcm4908enet_irq_handler(int irq, void *dev_id) -+{ -+ struct bcm4908enet *enet = dev_id; -+ -+ bcm4908enet_intrs_off(enet); -+ bcm4908enet_intrs_ack(enet); -+ -+ napi_schedule(&enet->napi); -+ -+ return IRQ_HANDLED; -+} -+ -+static int bcm4908enet_open(struct net_device *netdev) -+{ -+ struct bcm4908enet *enet = netdev_priv(netdev); -+ struct device *dev = enet->dev; -+ int err; -+ -+ err = request_irq(netdev->irq, bcm4908enet_irq_handler, 0, "enet", enet); -+ if (err) { -+ dev_err(dev, "Failed to request IRQ %d: %d\n", netdev->irq, err); -+ return err; -+ } -+ -+ bcm4908enet_gmac_init(enet); -+ bcm4908enet_dma_reset(enet); -+ bcm4908enet_dma_init(enet); -+ -+ enet_umac_set(enet, UMAC_CMD, CMD_TX_EN | CMD_RX_EN); -+ -+ enet_set(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_MASTER_EN); -+ enet_maskset(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_FLOWC_CH1_EN, 0); -+ bcm4908enet_dma_rx_ring_enable(enet, &enet->rx_ring); -+ -+ napi_enable(&enet->napi); -+ netif_carrier_on(netdev); -+ netif_start_queue(netdev); -+ -+ bcm4908enet_intrs_ack(enet); -+ bcm4908enet_intrs_on(enet); -+ -+ return 0; -+} -+ -+static int bcm4908enet_stop(struct net_device *netdev) -+{ -+ struct bcm4908enet *enet = netdev_priv(netdev); -+ -+ netif_stop_queue(netdev); -+ netif_carrier_off(netdev); -+ napi_disable(&enet->napi); -+ -+ bcm4908enet_dma_rx_ring_disable(enet, &enet->rx_ring); -+ bcm4908enet_dma_tx_ring_disable(enet, &enet->tx_ring); -+ -+ bcm4908enet_dma_uninit(enet); -+ -+ free_irq(enet->netdev->irq, enet); -+ -+ return 0; -+} -+ -+static int bcm4908enet_start_xmit(struct sk_buff *skb, struct net_device *netdev) -+{ -+ struct bcm4908enet *enet = netdev_priv(netdev); -+ struct bcm4908enet_dma_ring *ring = &enet->tx_ring; -+ struct bcm4908enet_dma_ring_slot *slot; -+ struct device *dev = enet->dev; -+ struct bcm4908enet_dma_ring_bd *buf_desc; -+ int free_buf_descs; -+ u32 tmp; -+ -+ /* Free transmitted skbs */ -+ while (ring->read_idx != ring->write_idx) { -+ buf_desc = &ring->buf_desc[ring->read_idx]; -+ if (buf_desc->ctl & DMA_CTL_STATUS_OWN) -+ break; -+ slot = &ring->slots[ring->read_idx]; -+ -+ dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_TO_DEVICE); -+ dev_kfree_skb(slot->skb); -+ if (++ring->read_idx == ring->length) -+ ring->read_idx = 0; -+ } -+ -+ /* Don't use the last empty buf descriptor */ -+ if (ring->read_idx <= ring->write_idx) -+ free_buf_descs = ring->read_idx - ring->write_idx + ring->length; -+ else -+ free_buf_descs = ring->read_idx - ring->write_idx; -+ if (free_buf_descs < 2) -+ return NETDEV_TX_BUSY; -+ -+ /* Hardware removes OWN bit after sending data */ -+ buf_desc = &ring->buf_desc[ring->write_idx]; -+ if (unlikely(le32_to_cpu(buf_desc->ctl) & DMA_CTL_STATUS_OWN)) { -+ netif_stop_queue(netdev); -+ return NETDEV_TX_BUSY; -+ } -+ -+ slot = &ring->slots[ring->write_idx]; -+ slot->skb = skb; -+ slot->len = skb->len; -+ slot->dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); -+ if (unlikely(dma_mapping_error(dev, slot->dma_addr))) -+ return NETDEV_TX_BUSY; -+ -+ tmp = skb->len << DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; -+ tmp |= DMA_CTL_STATUS_OWN; -+ tmp |= DMA_CTL_STATUS_SOP; -+ tmp |= DMA_CTL_STATUS_EOP; -+ tmp |= DMA_CTL_STATUS_APPEND_CRC; -+ if (ring->write_idx + 1 == ring->length - 1) -+ tmp |= DMA_CTL_STATUS_WRAP; -+ -+ buf_desc->addr = cpu_to_le32((uint32_t)slot->dma_addr); -+ buf_desc->ctl = cpu_to_le32(tmp); -+ -+ bcm4908enet_dma_tx_ring_ensable(enet, &enet->tx_ring); -+ -+ if (++ring->write_idx == ring->length - 1) -+ ring->write_idx = 0; -+ enet->netdev->stats.tx_bytes += skb->len; -+ enet->netdev->stats.tx_packets++; -+ -+ return NETDEV_TX_OK; -+} -+ -+static int bcm4908enet_poll(struct napi_struct *napi, int weight) -+{ -+ struct bcm4908enet *enet = container_of(napi, struct bcm4908enet, napi); -+ struct device *dev = enet->dev; -+ int handled = 0; -+ -+ while (handled < weight) { -+ struct bcm4908enet_dma_ring_bd *buf_desc; -+ struct bcm4908enet_dma_ring_slot slot; -+ u32 ctl; -+ int len; -+ int err; -+ -+ buf_desc = &enet->rx_ring.buf_desc[enet->rx_ring.read_idx]; -+ ctl = le32_to_cpu(buf_desc->ctl); -+ if (ctl & DMA_CTL_STATUS_OWN) -+ break; -+ -+ slot = enet->rx_ring.slots[enet->rx_ring.read_idx]; -+ -+ /* Provide new buffer before unpinning the old one */ -+ err = bcm4908enet_dma_alloc_rx_buf(enet, enet->rx_ring.read_idx); -+ if (err) -+ break; -+ -+ if (++enet->rx_ring.read_idx == enet->rx_ring.length) -+ enet->rx_ring.read_idx = 0; -+ -+ len = (ctl & DMA_CTL_LEN_DESC_BUFLENGTH) >> DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT; -+ -+ if (len < ENET_MTU_MIN || -+ (ctl & (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) != (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) { -+ enet->netdev->stats.rx_dropped++; -+ break; -+ } -+ -+ dma_unmap_single(dev, slot.dma_addr, slot.len, DMA_FROM_DEVICE); -+ -+ skb_put(slot.skb, len - 4 + 2); -+ slot.skb->protocol = eth_type_trans(slot.skb, enet->netdev); -+ netif_receive_skb(slot.skb); -+ -+ enet->netdev->stats.rx_packets++; -+ enet->netdev->stats.rx_bytes += len; -+ } -+ -+ if (handled < weight) { -+ napi_complete_done(napi, handled); -+ bcm4908enet_intrs_on(enet); -+ } -+ -+ return handled; -+} -+ -+static const struct net_device_ops bcm96xx_netdev_ops = { -+ .ndo_open = bcm4908enet_open, -+ .ndo_stop = bcm4908enet_stop, -+ .ndo_start_xmit = bcm4908enet_start_xmit, -+ .ndo_set_mac_address = eth_mac_addr, -+}; -+ -+static int bcm4908enet_probe(struct platform_device *pdev) -+{ -+ struct device *dev = &pdev->dev; -+ struct net_device *netdev; -+ struct bcm4908enet *enet; -+ int err; -+ -+ netdev = devm_alloc_etherdev(dev, sizeof(*enet)); -+ if (!netdev) -+ return -ENOMEM; -+ -+ enet = netdev_priv(netdev); -+ enet->dev = dev; -+ enet->netdev = netdev; -+ -+ enet->base = devm_platform_ioremap_resource(pdev, 0); -+ if (IS_ERR(enet->base)) { -+ dev_err(dev, "Failed to map registers: %ld\n", PTR_ERR(enet->base)); -+ return PTR_ERR(enet->base); -+ } -+ -+ netdev->irq = platform_get_irq_byname(pdev, "rx"); -+ if (netdev->irq < 0) -+ return netdev->irq; -+ -+ dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); -+ -+ err = bcm4908enet_dma_alloc(enet); -+ if (err) -+ return err; -+ -+ SET_NETDEV_DEV(netdev, &pdev->dev); -+ eth_hw_addr_random(netdev); -+ netdev->netdev_ops = &bcm96xx_netdev_ops; -+ netdev->min_mtu = ETH_ZLEN; -+ netdev->mtu = ENET_MTU_MAX; -+ netdev->max_mtu = ENET_MTU_MAX; -+ netif_napi_add(netdev, &enet->napi, bcm4908enet_poll, 64); -+ -+ err = register_netdev(netdev); -+ if (err) { -+ bcm4908enet_dma_free(enet); -+ return err; -+ } -+ -+ platform_set_drvdata(pdev, enet); -+ -+ return 0; -+} -+ -+static int bcm4908enet_remove(struct platform_device *pdev) -+{ -+ struct bcm4908enet *enet = platform_get_drvdata(pdev); -+ -+ unregister_netdev(enet->netdev); -+ netif_napi_del(&enet->napi); -+ bcm4908enet_dma_free(enet); -+ -+ return 0; -+} -+ -+static const struct of_device_id bcm4908enet_of_match[] = { -+ { .compatible = "brcm,bcm4908enet"}, -+ {}, -+}; -+ -+static struct platform_driver bcm4908enet_driver = { -+ .driver = { -+ .name = "bcm4908enet", -+ .of_match_table = bcm4908enet_of_match, -+ }, -+ .probe = bcm4908enet_probe, -+ .remove = bcm4908enet_remove, -+}; -+module_platform_driver(bcm4908enet_driver); -+ -+MODULE_LICENSE("GPL v2"); -+MODULE_DEVICE_TABLE(of, bcm4908enet_of_match); ---- /dev/null -+++ b/drivers/net/ethernet/broadcom/bcm4908enet.h -@@ -0,0 +1,96 @@ -+/* SPDX-License-Identifier: GPL-2.0-only */ -+#ifndef __BCM4908ENET_H -+#define __BCM4908ENET_H -+ -+#define ENET_CONTROL 0x000 -+#define ENET_MIB_CTRL 0x004 -+#define ENET_MIB_CTRL_CLR_MIB 0x00000001 -+#define ENET_RX_ERR_MASK 0x008 -+#define ENET_MIB_MAX_PKT_SIZE 0x00C -+#define ENET_MIB_MAX_PKT_SIZE_VAL 0x00003fff -+#define ENET_DIAG_OUT 0x01c -+#define ENET_ENABLE_DROP_PKT 0x020 -+#define ENET_IRQ_ENABLE 0x024 -+#define ENET_IRQ_ENABLE_OVFL 0x00000001 -+#define ENET_GMAC_STATUS 0x028 -+#define ENET_GMAC_STATUS_ETH_SPEED_MASK 0x00000003 -+#define ENET_GMAC_STATUS_ETH_SPEED_10 0x00000000 -+#define ENET_GMAC_STATUS_ETH_SPEED_100 0x00000001 -+#define ENET_GMAC_STATUS_ETH_SPEED_1000 0x00000002 -+#define ENET_GMAC_STATUS_HD 0x00000004 -+#define ENET_GMAC_STATUS_AUTO_CFG_EN 0x00000008 -+#define ENET_GMAC_STATUS_LINK_UP 0x00000010 -+#define ENET_IRQ_STATUS 0x02c -+#define ENET_IRQ_STATUS_OVFL 0x00000001 -+#define ENET_OVERFLOW_COUNTER 0x030 -+#define ENET_FLUSH 0x034 -+#define ENET_FLUSH_RXFIFO_FLUSH 0x00000001 -+#define ENET_FLUSH_TXFIFO_FLUSH 0x00000002 -+#define ENET_RSV_SELECT 0x038 -+#define ENET_BP_FORCE 0x03c -+#define ENET_BP_FORCE_FORCE 0x00000001 -+#define ENET_DMA_RX_OK_TO_SEND_COUNT 0x040 -+#define ENET_DMA_RX_OK_TO_SEND_COUNT_VAL 0x0000000f -+#define ENET_TX_CRC_CTRL 0x044 -+#define ENET_MIB 0x200 -+#define ENET_UNIMAC 0x400 -+#define ENET_DMA 0x800 -+#define ENET_DMA_CONTROLLER_CFG 0x800 -+#define ENET_DMA_CTRL_CFG_MASTER_EN 0x00000001 -+#define ENET_DMA_CTRL_CFG_FLOWC_CH1_EN 0x00000002 -+#define ENET_DMA_CTRL_CFG_FLOWC_CH3_EN 0x00000004 -+#define ENET_DMA_FLOWCTL_CH1_THRESH_LO 0x804 -+#define ENET_DMA_FLOWCTL_CH1_THRESH_HI 0x808 -+#define ENET_DMA_FLOWCTL_CH1_ALLOC 0x80c -+#define ENET_DMA_FLOWCTL_CH1_ALLOC_FORCE 0x80000000 -+#define ENET_DMA_FLOWCTL_CH3_THRESH_LO 0x810 -+#define ENET_DMA_FLOWCTL_CH3_THRESH_HI 0x814 -+#define ENET_DMA_FLOWCTL_CH3_ALLOC 0x818 -+#define ENET_DMA_FLOWCTL_CH5_THRESH_LO 0x81C -+#define ENET_DMA_FLOWCTL_CH5_THRESH_HI 0x820 -+#define ENET_DMA_FLOWCTL_CH5_ALLOC 0x824 -+#define ENET_DMA_FLOWCTL_CH7_THRESH_LO 0x828 -+#define ENET_DMA_FLOWCTL_CH7_THRESH_HI 0x82C -+#define ENET_DMA_FLOWCTL_CH7_ALLOC 0x830 -+#define ENET_DMA_CTRL_CHANNEL_RESET 0x834 -+#define ENET_DMA_CTRL_CHANNEL_DEBUG 0x838 -+#define ENET_DMA_CTRL_GLOBAL_INTERRUPT_STATUS 0x840 -+#define ENET_DMA_CTRL_GLOBAL_INTERRUPT_MASK 0x844 -+#define ENET_DMA_CH0_CFG 0xa00 /* RX */ -+#define ENET_DMA_CH1_CFG 0xa10 /* TX */ -+#define ENET_DMA_CH0_STATE_RAM 0xc00 /* RX */ -+#define ENET_DMA_CH1_STATE_RAM 0xc10 /* TX */ -+ -+#define ENET_DMA_CH_CFG 0x00 /* assorted configuration */ -+#define ENET_DMA_CH_CFG_ENABLE 0x00000001 /* set to enable channel */ -+#define ENET_DMA_CH_CFG_PKT_HALT 0x00000002 /* idle after an EOP flag is detected */ -+#define ENET_DMA_CH_CFG_BURST_HALT 0x00000004 /* idle after finish current memory burst */ -+#define ENET_DMA_CH_CFG_INT_STAT 0x04 /* interrupts control and status */ -+#define ENET_DMA_CH_CFG_INT_MASK 0x08 /* interrupts mask */ -+#define ENET_DMA_CH_CFG_INT_BUFF_DONE 0x00000001 /* buffer done */ -+#define ENET_DMA_CH_CFG_INT_DONE 0x00000002 /* packet xfer complete */ -+#define ENET_DMA_CH_CFG_INT_NO_DESC 0x00000004 /* no valid descriptors */ -+#define ENET_DMA_CH_CFG_INT_RX_ERROR 0x00000008 /* rxdma detect client protocol error */ -+#define ENET_DMA_CH_CFG_MAX_BURST 0x0c /* max burst length permitted */ -+#define ENET_DMA_CH_CFG_MAX_BURST_DESCSIZE_SEL 0x00040000 /* DMA Descriptor Size Selection */ -+#define ENET_DMA_CH_CFG_SIZE 0x10 -+ -+#define ENET_DMA_CH_STATE_RAM_BASE_DESC_PTR 0x00 /* descriptor ring start address */ -+#define ENET_DMA_CH_STATE_RAM_STATE_DATA 0x04 /* state/bytes done/ring offset */ -+#define ENET_DMA_CH_STATE_RAM_DESC_LEN_STATUS 0x08 /* buffer descriptor status and len */ -+#define ENET_DMA_CH_STATE_RAM_DESC_BASE_BUFPTR 0x0c /* buffer descrpitor current processing */ -+#define ENET_DMA_CH_STATE_RAM_SIZE 0x10 -+ -+#define DMA_CTL_STATUS_APPEND_CRC 0x00000100 -+#define DMA_CTL_STATUS_APPEND_BRCM_TAG 0x00000200 -+#define DMA_CTL_STATUS_PRIO 0x00000C00 /* Prio for Tx */ -+#define DMA_CTL_STATUS_WRAP 0x00001000 /* */ -+#define DMA_CTL_STATUS_SOP 0x00002000 /* first buffer in packet */ -+#define DMA_CTL_STATUS_EOP 0x00004000 /* last buffer in packet */ -+#define DMA_CTL_STATUS_OWN 0x00008000 /* cleared by DMA, set by SW */ -+#define DMA_CTL_LEN_DESC_BUFLENGTH 0x0fff0000 -+#define DMA_CTL_LEN_DESC_BUFLENGTH_SHIFT 16 -+#define DMA_CTL_LEN_DESC_MULTICAST 0x40000000 -+#define DMA_CTL_LEN_DESC_USEFPM 0x80000000 -+ -+#endif diff --git a/target/linux/bcm4908/patches-5.4/302-arm64-dts-broadcom-bcm4908-describe-Ethernet-control.patch b/target/linux/bcm4908/patches-5.4/302-arm64-dts-broadcom-bcm4908-describe-Ethernet-control.patch index 755292dacf..f70487cecc 100644 --- a/target/linux/bcm4908/patches-5.4/302-arm64-dts-broadcom-bcm4908-describe-Ethernet-control.patch +++ b/target/linux/bcm4908/patches-5.4/302-arm64-dts-broadcom-bcm4908-describe-Ethernet-control.patch @@ -10,40 +10,38 @@ BCM4908 SoCs have an integrated Ethernet controller. Signed-off-by: Rafał Miłecki --- ---- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts -+++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts -@@ -87,6 +87,17 @@ - full-duplex; - }; - }; -+ -+ port@8 { -+ reg = <8>; -+ phy-mode = "internal"; -+ brcm,use-bcm-hdr; -+ ethernet = <&gmac>; -+ fixed-link { -+ speed = <1000>; -+ full-duplex; -+ }; -+ }; - }; - - &mdio { --- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi +++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi -@@ -112,6 +112,14 @@ +@@ -112,6 +112,13 @@ #size-cells = <1>; ranges = <0x00 0x00 0x80000000 0x281000>; -+ gmac: ethernet@2000 { -+ compatible = "brcm,bcm4908enet"; ++ enet: ethernet@2000 { ++ compatible = "brcm,bcm4908-enet"; + reg = <0x2000 0x1000>; + + interrupts = ; -+ interrupt-names = "rx"; + }; + usb_phy: usb-phy@c200 { compatible = "brcm,bcm4908-usb-phy"; reg = <0xc200 0x100>; +@@ -199,6 +206,18 @@ + phy-mode = "internal"; + phy-handle = <&phy11>; + }; ++ ++ port@8 { ++ reg = <8>; ++ phy-mode = "internal"; ++ brcm,use-bcm-hdr; ++ ethernet = <&enet>; ++ ++ fixed-link { ++ speed = <1000>; ++ full-duplex; ++ }; ++ }; + }; + }; +