Commit 490cb412 authored by Justin Chen's avatar Justin Chen Committed by David S. Miller
Browse files

net: bcmasp: Add support for ASP2.0 Ethernet controller 



Add support for the Broadcom ASP 2.0 Ethernet controller which is first
introduced with 72165. This controller features two distinct Ethernet
ports that can be independently operated.

Reviewed-by: default avatarSimon Horman <simon.horman@corigine.com>
Signed-off-by: default avatarFlorian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: default avatarJustin Chen <justin.chen@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a29401be

drivers/net/ethernet/broadcom/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -255,4 +255,15 @@ config BNXT_HWMON 
	  Say Y if you want to expose the thermal sensor data on NetXtreme-C/E

	  devices, via the hwmon sysfs interface.



config BCMASP

	tristate "Broadcom ASP 2.0 Ethernet support"

	default ARCH_BRCMSTB

	depends on OF

	select MII

	select PHYLIB

	select MDIO_BCM_UNIMAC

	help

	  This configuration enables the Broadcom ASP 2.0 Ethernet controller

	  driver which is present in Broadcom STB SoCs such as 72165.



endif # NET_VENDOR_BROADCOM

drivers/net/ethernet/broadcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -17,3 +17,4 @@ obj-$(CONFIG_BGMAC_BCMA) += bgmac-bcma.o bgmac-bcma-mdio.o 
obj-$(CONFIG_BGMAC_PLATFORM) += bgmac-platform.o

obj-$(CONFIG_SYSTEMPORT) += bcmsysport.o

obj-$(CONFIG_BNXT) += bnxt/

obj-$(CONFIG_BCMASP) += asp2/

drivers/net/ethernet/broadcom/asp2/Makefile

0 → 100644
+2 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_BCMASP) += bcm-asp.o

bcm-asp-objs := bcmasp.o bcmasp_intf.o bcmasp_ethtool.o

drivers/net/ethernet/broadcom/asp2/bcmasp.c

0 → 100644
+696 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Broadcom STB ASP 2.0 Driver

 *

 * Copyright (c) 2023 Broadcom

 */

#include <linux/etherdevice.h>

#include <linux/if_vlan.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_platform.h>

#include <linux/clk.h>



#include "bcmasp.h"

#include "bcmasp_intf_defs.h"



static void _intr2_mask_clear(struct bcmasp_priv *priv, u32 mask)

{

	intr2_core_wl(priv, mask, ASP_INTR2_MASK_CLEAR);

	priv->irq_mask &= ~mask;

}



static void _intr2_mask_set(struct bcmasp_priv *priv, u32 mask)

{

	intr2_core_wl(priv, mask, ASP_INTR2_MASK_SET);

	priv->irq_mask |= mask;

}



void bcmasp_enable_tx_irq(struct bcmasp_intf *intf, int en)

{

	struct bcmasp_priv *priv = intf->parent;



	if (en)

		_intr2_mask_clear(priv, ASP_INTR2_TX_DESC(intf->channel));

	else

		_intr2_mask_set(priv, ASP_INTR2_TX_DESC(intf->channel));

}

EXPORT_SYMBOL_GPL(bcmasp_enable_tx_irq);



void bcmasp_enable_rx_irq(struct bcmasp_intf *intf, int en)

{

	struct bcmasp_priv *priv = intf->parent;



	if (en)

		_intr2_mask_clear(priv, ASP_INTR2_RX_ECH(intf->channel));

	else

		_intr2_mask_set(priv, ASP_INTR2_RX_ECH(intf->channel));

}

EXPORT_SYMBOL_GPL(bcmasp_enable_rx_irq);



static void bcmasp_intr2_mask_set_all(struct bcmasp_priv *priv)

{

	_intr2_mask_set(priv, 0xffffffff);

	priv->irq_mask = 0xffffffff;

}



static void bcmasp_intr2_clear_all(struct bcmasp_priv *priv)

{

	intr2_core_wl(priv, 0xffffffff, ASP_INTR2_CLEAR);

}



static void bcmasp_intr2_handling(struct bcmasp_intf *intf, u32 status)

{

	if (status & ASP_INTR2_RX_ECH(intf->channel)) {

		if (likely(napi_schedule_prep(&intf->rx_napi))) {

			bcmasp_enable_rx_irq(intf, 0);

			__napi_schedule_irqoff(&intf->rx_napi);

		}

	}



	if (status & ASP_INTR2_TX_DESC(intf->channel)) {

		if (likely(napi_schedule_prep(&intf->tx_napi))) {

			bcmasp_enable_tx_irq(intf, 0);

			__napi_schedule_irqoff(&intf->tx_napi);

		}

	}

}



static irqreturn_t bcmasp_isr(int irq, void *data)

{

	struct bcmasp_priv *priv = data;

	struct bcmasp_intf *intf;

	u32 status;



	status = intr2_core_rl(priv, ASP_INTR2_STATUS) &

		~intr2_core_rl(priv, ASP_INTR2_MASK_STATUS);



	intr2_core_wl(priv, status, ASP_INTR2_CLEAR);



	if (unlikely(status == 0)) {

		dev_warn(&priv->pdev->dev, "l2 spurious interrupt\n");

		return IRQ_NONE;

	}



	/* Handle intferfaces */

	list_for_each_entry(intf, &priv->intfs, list)

		bcmasp_intr2_handling(intf, status);



	return IRQ_HANDLED;

}



void bcmasp_flush_rx_port(struct bcmasp_intf *intf)

{

	struct bcmasp_priv *priv = intf->parent;

	u32 mask;



	switch (intf->port) {

	case 0:

		mask = ASP_CTRL_UMAC0_FLUSH_MASK;

		break;

	case 1:

		mask = ASP_CTRL_UMAC1_FLUSH_MASK;

		break;

	case 2:

		mask = ASP_CTRL_SPB_FLUSH_MASK;

		break;

	default:

		/* Not valid port */

		return;

	}



	rx_ctrl_core_wl(priv, mask, priv->hw_info->rx_ctrl_flush);

}



static void bcmasp_addr_to_uint(unsigned char *addr, u32 *high, u32 *low)

{

	*high = (u32)(addr[0] << 8 | addr[1]);

	*low = (u32)(addr[2] << 24 | addr[3] << 16 | addr[4] << 8 |

		     addr[5]);

}



static void bcmasp_set_mda_filter(struct bcmasp_intf *intf,

				  const unsigned char *addr,

				  unsigned char *mask,

				  unsigned int i)

{

	struct bcmasp_priv *priv = intf->parent;

	u32 addr_h, addr_l, mask_h, mask_l;



	/* Set local copy */

	ether_addr_copy(priv->mda_filters[i].mask, mask);

	ether_addr_copy(priv->mda_filters[i].addr, addr);



	/* Write to HW */

	bcmasp_addr_to_uint(priv->mda_filters[i].mask, &mask_h, &mask_l);

	bcmasp_addr_to_uint(priv->mda_filters[i].addr, &addr_h, &addr_l);

	rx_filter_core_wl(priv, addr_h, ASP_RX_FILTER_MDA_PAT_H(i));

	rx_filter_core_wl(priv, addr_l, ASP_RX_FILTER_MDA_PAT_L(i));

	rx_filter_core_wl(priv, mask_h, ASP_RX_FILTER_MDA_MSK_H(i));

	rx_filter_core_wl(priv, mask_l, ASP_RX_FILTER_MDA_MSK_L(i));

}



static void bcmasp_en_mda_filter(struct bcmasp_intf *intf, bool en,

				 unsigned int i)

{

	struct bcmasp_priv *priv = intf->parent;



	if (priv->mda_filters[i].en == en)

		return;



	priv->mda_filters[i].en = en;

	priv->mda_filters[i].port = intf->port;



	rx_filter_core_wl(priv, ((intf->channel + 8) |

			  (en << ASP_RX_FILTER_MDA_CFG_EN_SHIFT) |

			  ASP_RX_FILTER_MDA_CFG_UMC_SEL(intf->port)),

			  ASP_RX_FILTER_MDA_CFG(i));

}



/* There are 32 MDA filters shared between all ports, we reserve 4 filters per

 * port for the following.

 * - Promisc: Filter to allow all packets when promisc is enabled

 * - All Multicast

 * - Broadcast

 * - Own address

 *

 * The reserved filters are identified as so.

 * - Promisc: (index * 4) + 0

 * - All Multicast: (index * 4) + 1

 * - Broadcast: (index * 4) + 2

 * - Own address: (index * 4) + 3

 */

enum asp_rx_filter_id {

	ASP_RX_FILTER_MDA_PROMISC = 0,

	ASP_RX_FILTER_MDA_ALLMULTI,

	ASP_RX_FILTER_MDA_BROADCAST,

	ASP_RX_FILTER_MDA_OWN_ADDR,

	ASP_RX_FILTER_MDA_RES_MAX,

};



#define ASP_RX_FILT_MDA(intf, name)	(((intf)->index * \

					  ASP_RX_FILTER_MDA_RES_MAX) \

					 + ASP_RX_FILTER_MDA_##name)



static int bcmasp_total_res_mda_cnt(struct bcmasp_priv *priv)

{

	return list_count_nodes(&priv->intfs) * ASP_RX_FILTER_MDA_RES_MAX;

}



void bcmasp_set_promisc(struct bcmasp_intf *intf, bool en)

{

	unsigned int i = ASP_RX_FILT_MDA(intf, PROMISC);

	unsigned char promisc[ETH_ALEN];



	eth_zero_addr(promisc);

	/* Set mask to 00:00:00:00:00:00 to match all packets */

	bcmasp_set_mda_filter(intf, promisc, promisc, i);

	bcmasp_en_mda_filter(intf, en, i);

}



void bcmasp_set_allmulti(struct bcmasp_intf *intf, bool en)

{

	unsigned char allmulti[] = {0x01, 0x00, 0x00, 0x00, 0x00, 0x00};

	unsigned int i = ASP_RX_FILT_MDA(intf, ALLMULTI);



	/* Set mask to 01:00:00:00:00:00 to match all multicast */

	bcmasp_set_mda_filter(intf, allmulti, allmulti, i);

	bcmasp_en_mda_filter(intf, en, i);

}



void bcmasp_set_broad(struct bcmasp_intf *intf, bool en)

{

	unsigned int i = ASP_RX_FILT_MDA(intf, BROADCAST);

	unsigned char addr[ETH_ALEN];



	eth_broadcast_addr(addr);

	bcmasp_set_mda_filter(intf, addr, addr, i);

	bcmasp_en_mda_filter(intf, en, i);

}



void bcmasp_set_oaddr(struct bcmasp_intf *intf, const unsigned char *addr,

		      bool en)

{

	unsigned char mask[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

	unsigned int i = ASP_RX_FILT_MDA(intf, OWN_ADDR);



	bcmasp_set_mda_filter(intf, addr, mask, i);

	bcmasp_en_mda_filter(intf, en, i);

}



void bcmasp_disable_all_filters(struct bcmasp_intf *intf)

{

	struct bcmasp_priv *priv = intf->parent;

	unsigned int i;

	int res_count;



	res_count = bcmasp_total_res_mda_cnt(intf->parent);



	/* Disable all filters held by this port */

	for (i = res_count; i < NUM_MDA_FILTERS; i++) {

		if (priv->mda_filters[i].en &&

		    priv->mda_filters[i].port == intf->port)

			bcmasp_en_mda_filter(intf, 0, i);

	}

}



static int bcmasp_combine_set_filter(struct bcmasp_intf *intf,

				     unsigned char *addr, unsigned char *mask,

				     int i)

{

	struct bcmasp_priv *priv = intf->parent;

	u64 addr1, addr2, mask1, mask2, mask3;



	/* Switch to u64 to help with the calculations */

	addr1 = ether_addr_to_u64(priv->mda_filters[i].addr);

	mask1 = ether_addr_to_u64(priv->mda_filters[i].mask);

	addr2 = ether_addr_to_u64(addr);

	mask2 = ether_addr_to_u64(mask);



	/* Check if one filter resides within the other */

	mask3 = mask1 & mask2;

	if (mask3 == mask1 && ((addr1 & mask1) == (addr2 & mask1))) {

		/* Filter 2 resides within filter 1, so everything is good */

		return 0;

	} else if (mask3 == mask2 && ((addr1 & mask2) == (addr2 & mask2))) {

		/* Filter 1 resides within filter 2, so swap filters */

		bcmasp_set_mda_filter(intf, addr, mask, i);

		return 0;

	}



	/* Unable to combine */

	return -EINVAL;

}



int bcmasp_set_en_mda_filter(struct bcmasp_intf *intf, unsigned char *addr,

			     unsigned char *mask)

{

	struct bcmasp_priv *priv = intf->parent;

	int ret, res_count;

	unsigned int i;



	res_count = bcmasp_total_res_mda_cnt(intf->parent);



	for (i = res_count; i < NUM_MDA_FILTERS; i++) {

		/* If filter not enabled or belongs to another port skip */

		if (!priv->mda_filters[i].en ||

		    priv->mda_filters[i].port != intf->port)

			continue;



		/* Attempt to combine filters */

		ret = bcmasp_combine_set_filter(intf, addr, mask, i);

		if (!ret)

			return 0;

	}



	/* Create new filter if possible */

	for (i = res_count; i < NUM_MDA_FILTERS; i++) {

		if (priv->mda_filters[i].en)

			continue;



		bcmasp_set_mda_filter(intf, addr, mask, i);

		bcmasp_en_mda_filter(intf, 1, i);

		return 0;

	}



	/* No room for new filter */

	return -EINVAL;

}



static void bcmasp_core_init_filters(struct bcmasp_priv *priv)

{

	unsigned int i;



	/* Disable all filters and reset software view since the HW

	 * can lose context while in deep sleep suspend states

	 */

	for (i = 0; i < NUM_MDA_FILTERS; i++) {

		rx_filter_core_wl(priv, 0x0, ASP_RX_FILTER_MDA_CFG(i));

		priv->mda_filters[i].en = 0;

	}



	/* Top level filter enable bit should be enabled at all times, set

	 * GEN_WAKE_CLEAR to clear the network filter wake-up which would

	 * otherwise be sticky

	 */

	rx_filter_core_wl(priv, (ASP_RX_FILTER_OPUT_EN |

			  ASP_RX_FILTER_MDA_EN |

			  ASP_RX_FILTER_GEN_WK_CLR |

			  ASP_RX_FILTER_NT_FLT_EN),

			  ASP_RX_FILTER_BLK_CTRL);

}



/* ASP core initialization */

static void bcmasp_core_init(struct bcmasp_priv *priv)

{

	tx_analytics_core_wl(priv, 0x0, ASP_TX_ANALYTICS_CTRL);

	rx_analytics_core_wl(priv, 0x4, ASP_RX_ANALYTICS_CTRL);



	rx_edpkt_core_wl(priv, (ASP_EDPKT_HDR_SZ_128 << ASP_EDPKT_HDR_SZ_SHIFT),

			 ASP_EDPKT_HDR_CFG);

	rx_edpkt_core_wl(priv,

			 (ASP_EDPKT_ENDI_BT_SWP_WD << ASP_EDPKT_ENDI_DESC_SHIFT),

			 ASP_EDPKT_ENDI);



	rx_edpkt_core_wl(priv, 0x1b, ASP_EDPKT_BURST_BUF_PSCAL_TOUT);

	rx_edpkt_core_wl(priv, 0x3e8, ASP_EDPKT_BURST_BUF_WRITE_TOUT);

	rx_edpkt_core_wl(priv, 0x3e8, ASP_EDPKT_BURST_BUF_READ_TOUT);



	rx_edpkt_core_wl(priv, ASP_EDPKT_ENABLE_EN, ASP_EDPKT_ENABLE);



	/* Disable and clear both UniMAC's wake-up interrupts to avoid

	 * sticky interrupts.

	 */

	_intr2_mask_set(priv, ASP_INTR2_UMC0_WAKE | ASP_INTR2_UMC1_WAKE);

	intr2_core_wl(priv, ASP_INTR2_UMC0_WAKE | ASP_INTR2_UMC1_WAKE,

		      ASP_INTR2_CLEAR);

}



static void bcmasp_core_clock_select(struct bcmasp_priv *priv, bool slow)

{

	u32 reg;



	reg = ctrl_core_rl(priv, ASP_CTRL_CORE_CLOCK_SELECT);

	if (slow)

		reg &= ~ASP_CTRL_CORE_CLOCK_SELECT_MAIN;

	else

		reg |= ASP_CTRL_CORE_CLOCK_SELECT_MAIN;

	ctrl_core_wl(priv, reg, ASP_CTRL_CORE_CLOCK_SELECT);

}



static void bcmasp_core_clock_set_ll(struct bcmasp_priv *priv, u32 clr, u32 set)

{

	u32 reg;



	reg = ctrl_core_rl(priv, ASP_CTRL_CLOCK_CTRL);

	reg &= ~clr;

	reg |= set;

	ctrl_core_wl(priv, reg, ASP_CTRL_CLOCK_CTRL);



	reg = ctrl_core_rl(priv, ASP_CTRL_SCRATCH_0);

	reg &= ~clr;

	reg |= set;

	ctrl_core_wl(priv, reg, ASP_CTRL_SCRATCH_0);

}



static void bcmasp_core_clock_set(struct bcmasp_priv *priv, u32 clr, u32 set)

{

	unsigned long flags;



	spin_lock_irqsave(&priv->clk_lock, flags);

	bcmasp_core_clock_set_ll(priv, clr, set);

	spin_unlock_irqrestore(&priv->clk_lock, flags);

}



void bcmasp_core_clock_set_intf(struct bcmasp_intf *intf, bool en)

{

	u32 intf_mask = ASP_CTRL_CLOCK_CTRL_ASP_RGMII_DIS(intf->port);

	struct bcmasp_priv *priv = intf->parent;

	unsigned long flags;

	u32 reg;



	/* When enabling an interface, if the RX or TX clocks were not enabled,

	 * enable them. Conversely, while disabling an interface, if this is

	 * the last one enabled, we can turn off the shared RX and TX clocks as

	 * well. We control enable bits which is why we test for equality on

	 * the RGMII clock bit mask.

	 */

	spin_lock_irqsave(&priv->clk_lock, flags);

	if (en) {

		intf_mask |= ASP_CTRL_CLOCK_CTRL_ASP_TX_DISABLE |

			     ASP_CTRL_CLOCK_CTRL_ASP_RX_DISABLE;

		bcmasp_core_clock_set_ll(priv, intf_mask, 0);

	} else {

		reg = ctrl_core_rl(priv, ASP_CTRL_SCRATCH_0) | intf_mask;

		if ((reg & ASP_CTRL_CLOCK_CTRL_ASP_RGMII_MASK) ==

		    ASP_CTRL_CLOCK_CTRL_ASP_RGMII_MASK)

			intf_mask |= ASP_CTRL_CLOCK_CTRL_ASP_TX_DISABLE |

				     ASP_CTRL_CLOCK_CTRL_ASP_RX_DISABLE;

		bcmasp_core_clock_set_ll(priv, 0, intf_mask);

	}

	spin_unlock_irqrestore(&priv->clk_lock, flags);

}



static struct bcmasp_hw_info v20_hw_info = {

	.rx_ctrl_flush = ASP_RX_CTRL_FLUSH,

	.umac2fb = UMAC2FB_OFFSET,

	.rx_ctrl_fb_out_frame_count = ASP_RX_CTRL_FB_OUT_FRAME_COUNT,

	.rx_ctrl_fb_filt_out_frame_count = ASP_RX_CTRL_FB_FILT_OUT_FRAME_COUNT,

	.rx_ctrl_fb_rx_fifo_depth = ASP_RX_CTRL_FB_RX_FIFO_DEPTH,

};



static const struct bcmasp_plat_data v20_plat_data = {

	.hw_info = &v20_hw_info,

};



static struct bcmasp_hw_info v21_hw_info = {

	.rx_ctrl_flush = ASP_RX_CTRL_FLUSH_2_1,

	.umac2fb = UMAC2FB_OFFSET_2_1,

	.rx_ctrl_fb_out_frame_count = ASP_RX_CTRL_FB_OUT_FRAME_COUNT_2_1,

	.rx_ctrl_fb_filt_out_frame_count =

		ASP_RX_CTRL_FB_FILT_OUT_FRAME_COUNT_2_1,

	.rx_ctrl_fb_rx_fifo_depth = ASP_RX_CTRL_FB_RX_FIFO_DEPTH_2_1,

};



static const struct bcmasp_plat_data v21_plat_data = {

	.hw_info = &v21_hw_info,

};



static const struct of_device_id bcmasp_of_match[] = {

	{ .compatible = "brcm,asp-v2.0", .data = &v20_plat_data },

	{ .compatible = "brcm,asp-v2.1", .data = &v21_plat_data },

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(of, bcmasp_of_match);



static const struct of_device_id bcmasp_mdio_of_match[] = {

	{ .compatible = "brcm,asp-v2.1-mdio", },

	{ .compatible = "brcm,asp-v2.0-mdio", },

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(of, bcmasp_mdio_of_match);



static void bcmasp_remove_intfs(struct bcmasp_priv *priv)

{

	struct bcmasp_intf *intf, *n;



	list_for_each_entry_safe(intf, n, &priv->intfs, list) {

		list_del(&intf->list);

		bcmasp_interface_destroy(intf);

	}

}



static int bcmasp_probe(struct platform_device *pdev)

{

	struct device_node *ports_node, *intf_node;

	const struct bcmasp_plat_data *pdata;

	struct device *dev = &pdev->dev;

	struct bcmasp_priv *priv;

	struct bcmasp_intf *intf;

	int ret = 0, count = 0;

	unsigned int i;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->irq = platform_get_irq(pdev, 0);

	if (priv->irq <= 0)

		return dev_err_probe(dev, -EINVAL, "invalid interrupt\n");



	priv->clk = devm_clk_get_optional_enabled(dev, "sw_asp");

	if (IS_ERR(priv->clk))

		return dev_err_probe(dev, PTR_ERR(priv->clk),

				     "failed to request clock\n");



	/* Base from parent node */

	priv->base = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(priv->base))

		return dev_err_probe(dev, PTR_ERR(priv->base), "failed to iomap\n");



	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));

	if (ret)

		return dev_err_probe(dev, ret, "unable to set DMA mask: %d\n", ret);



	dev_set_drvdata(&pdev->dev, priv);

	priv->pdev = pdev;

	spin_lock_init(&priv->mda_lock);

	spin_lock_init(&priv->clk_lock);

	INIT_LIST_HEAD(&priv->intfs);



	pdata = device_get_match_data(&pdev->dev);

	if (!pdata)

		return dev_err_probe(dev, -EINVAL, "unable to find platform data\n");



	priv->hw_info = pdata->hw_info;



	/* Enable all clocks to ensure successful probing */

	bcmasp_core_clock_set(priv, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE, 0);



	/* Switch to the main clock */

	bcmasp_core_clock_select(priv, false);



	bcmasp_intr2_mask_set_all(priv);

	bcmasp_intr2_clear_all(priv);



	ret = devm_request_irq(&pdev->dev, priv->irq, bcmasp_isr, 0,

			       pdev->name, priv);

	if (ret)

		return dev_err_probe(dev, ret, "failed to request ASP interrupt: %d", ret);



	/* Register mdio child nodes */

	of_platform_populate(dev->of_node, bcmasp_mdio_of_match, NULL, dev);



	/* ASP specific initialization, Needs to be done regardless of

	 * how many interfaces come up.

	 */

	bcmasp_core_init(priv);

	bcmasp_core_init_filters(priv);



	ports_node = of_find_node_by_name(dev->of_node, "ethernet-ports");

	if (!ports_node) {

		dev_warn(dev, "No ports found\n");

		return -EINVAL;

	}



	i = 0;

	for_each_available_child_of_node(ports_node, intf_node) {

		intf = bcmasp_interface_create(priv, intf_node, i);

		if (!intf) {

			dev_err(dev, "Cannot create eth interface %d\n", i);

			bcmasp_remove_intfs(priv);

			goto of_put_exit;

		}

		list_add_tail(&intf->list, &priv->intfs);

		i++;

	}



	/* Drop the clock reference count now and let ndo_open()/ndo_close()

	 * manage it for us from now on.

	 */

	bcmasp_core_clock_set(priv, 0, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE);



	clk_disable_unprepare(priv->clk);



	/* Now do the registration of the network ports which will take care

	 * of managing the clock properly.

	 */

	list_for_each_entry(intf, &priv->intfs, list) {

		ret = register_netdev(intf->ndev);

		if (ret) {

			netdev_err(intf->ndev,

				   "failed to register net_device: %d\n", ret);

			bcmasp_remove_intfs(priv);

			goto of_put_exit;

		}

		count++;

	}



	dev_info(dev, "Initialized %d port(s)\n", count);



of_put_exit:

	of_node_put(ports_node);

	return ret;

}



static int bcmasp_remove(struct platform_device *pdev)

{

	struct bcmasp_priv *priv = dev_get_drvdata(&pdev->dev);



	if (!priv)

		return 0;



	bcmasp_remove_intfs(priv);



	return 0;

}



static void bcmasp_shutdown(struct platform_device *pdev)

{

	bcmasp_remove(pdev);

}



static int __maybe_unused bcmasp_suspend(struct device *d)

{

	struct bcmasp_priv *priv = dev_get_drvdata(d);

	struct bcmasp_intf *intf;

	int ret;



	list_for_each_entry(intf, &priv->intfs, list) {

		ret = bcmasp_interface_suspend(intf);

		if (ret)

			break;

	}



	ret = clk_prepare_enable(priv->clk);

	if (ret)

		return ret;



	/* Whether Wake-on-LAN is enabled or not, we can always disable

	 * the shared TX clock

	 */

	bcmasp_core_clock_set(priv, 0, ASP_CTRL_CLOCK_CTRL_ASP_TX_DISABLE);



	bcmasp_core_clock_select(priv, true);



	clk_disable_unprepare(priv->clk);



	return ret;

}



static int __maybe_unused bcmasp_resume(struct device *d)

{

	struct bcmasp_priv *priv = dev_get_drvdata(d);

	struct bcmasp_intf *intf;

	int ret;



	ret = clk_prepare_enable(priv->clk);

	if (ret)

		return ret;



	/* Switch to the main clock domain */

	bcmasp_core_clock_select(priv, false);



	/* Re-enable all clocks for re-initialization */

	bcmasp_core_clock_set(priv, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE, 0);



	bcmasp_core_init(priv);

	bcmasp_core_init_filters(priv);



	/* And disable them to let the network devices take care of them */

	bcmasp_core_clock_set(priv, 0, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE);



	clk_disable_unprepare(priv->clk);



	list_for_each_entry(intf, &priv->intfs, list) {

		ret = bcmasp_interface_resume(intf);

		if (ret)

			break;

	}



	return ret;

}



static SIMPLE_DEV_PM_OPS(bcmasp_pm_ops,

			 bcmasp_suspend, bcmasp_resume);



static struct platform_driver bcmasp_driver = {

	.probe = bcmasp_probe,

	.remove = bcmasp_remove,

	.shutdown = bcmasp_shutdown,

	.driver = {

		.name = "brcm,asp-v2",

		.of_match_table = bcmasp_of_match,

		.pm = &bcmasp_pm_ops,

	},

};

module_platform_driver(bcmasp_driver);



MODULE_DESCRIPTION("Broadcom ASP 2.0 Ethernet controller driver");

MODULE_ALIAS("platform:brcm,asp-v2");

MODULE_LICENSE("GPL");

drivers/net/ethernet/broadcom/asp2/bcmasp.h

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