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linux-zen-desktop/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

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// SPDX-License-Identifier: GPL-2.0-only
/*******************************************************************************
This contains the functions to handle the platform driver.
Copyright (C) 2007-2011 STMicroelectronics Ltd
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/of_device.h>
#include <linux/of_mdio.h>
#include "stmmac.h"
#include "stmmac_platform.h"
#ifdef CONFIG_OF
/**
* dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
* @dev: struct device of the platform device
* @mcast_bins: Multicast filtering bins
* Description:
* this function validates the number of Multicast filtering bins specified
* by the configuration through the device tree. The Synopsys GMAC supports
* 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
* number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
* to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
* invalid and will cause the filtering algorithm to use Multicast
* promiscuous mode.
*/
static int dwmac1000_validate_mcast_bins(struct device *dev, int mcast_bins)
{
int x = mcast_bins;
switch (x) {
case HASH_TABLE_SIZE:
case 128:
case 256:
break;
default:
x = 0;
dev_info(dev, "Hash table entries set to unexpected value %d\n",
mcast_bins);
break;
}
return x;
}
/**
* dwmac1000_validate_ucast_entries - validate the Unicast address entries
* @dev: struct device of the platform device
* @ucast_entries: number of Unicast address entries
* Description:
* This function validates the number of Unicast address entries supported
* by a particular Synopsys 10/100/1000 controller. The Synopsys controller
* supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
* logic. This function validates a valid, supported configuration is
* selected, and defaults to 1 Unicast address if an unsupported
* configuration is selected.
*/
static int dwmac1000_validate_ucast_entries(struct device *dev,
int ucast_entries)
{
int x = ucast_entries;
switch (x) {
case 1 ... 32:
case 64:
case 128:
break;
default:
x = 1;
dev_info(dev, "Unicast table entries set to unexpected value %d\n",
ucast_entries);
break;
}
return x;
}
/**
* stmmac_axi_setup - parse DT parameters for programming the AXI register
* @pdev: platform device
* Description:
* if required, from device-tree the AXI internal register can be tuned
* by using platform parameters.
*/
static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
{
struct device_node *np;
struct stmmac_axi *axi;
np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
if (!np)
return NULL;
axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
if (!axi) {
of_node_put(np);
return ERR_PTR(-ENOMEM);
}
axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
axi->axi_kbbe = of_property_read_bool(np, "snps,kbbe");
axi->axi_fb = of_property_read_bool(np, "snps,fb");
axi->axi_mb = of_property_read_bool(np, "snps,mb");
axi->axi_rb = of_property_read_bool(np, "snps,rb");
if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
axi->axi_wr_osr_lmt = 1;
if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
axi->axi_rd_osr_lmt = 1;
of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
of_node_put(np);
return axi;
}
/**
* stmmac_mtl_setup - parse DT parameters for multiple queues configuration
* @pdev: platform device
* @plat: enet data
*/
static int stmmac_mtl_setup(struct platform_device *pdev,
struct plat_stmmacenet_data *plat)
{
struct device_node *q_node;
struct device_node *rx_node;
struct device_node *tx_node;
u8 queue = 0;
int ret = 0;
/* For backwards-compatibility with device trees that don't have any
* snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
* to one RX and TX queues each.
*/
plat->rx_queues_to_use = 1;
plat->tx_queues_to_use = 1;
/* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
* to always set this, otherwise Queue will be classified as AVB
* (because MTL_QUEUE_AVB = 0).
*/
plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
if (!rx_node)
return ret;
tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
if (!tx_node) {
of_node_put(rx_node);
return ret;
}
/* Processing RX queues common config */
if (of_property_read_u32(rx_node, "snps,rx-queues-to-use",
&plat->rx_queues_to_use))
plat->rx_queues_to_use = 1;
if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
else
plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
/* Processing individual RX queue config */
for_each_child_of_node(rx_node, q_node) {
if (queue >= plat->rx_queues_to_use)
break;
if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
else
plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
if (of_property_read_u32(q_node, "snps,map-to-dma-channel",
&plat->rx_queues_cfg[queue].chan))
plat->rx_queues_cfg[queue].chan = queue;
/* TODO: Dynamic mapping to be included in the future */
if (of_property_read_u32(q_node, "snps,priority",
&plat->rx_queues_cfg[queue].prio)) {
plat->rx_queues_cfg[queue].prio = 0;
plat->rx_queues_cfg[queue].use_prio = false;
} else {
plat->rx_queues_cfg[queue].use_prio = true;
}
/* RX queue specific packet type routing */
if (of_property_read_bool(q_node, "snps,route-avcp"))
plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
else if (of_property_read_bool(q_node, "snps,route-ptp"))
plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
else if (of_property_read_bool(q_node, "snps,route-up"))
plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
else
plat->rx_queues_cfg[queue].pkt_route = 0x0;
queue++;
}
if (queue != plat->rx_queues_to_use) {
ret = -EINVAL;
dev_err(&pdev->dev, "Not all RX queues were configured\n");
goto out;
}
/* Processing TX queues common config */
if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
&plat->tx_queues_to_use))
plat->tx_queues_to_use = 1;
if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
else
plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
queue = 0;
/* Processing individual TX queue config */
for_each_child_of_node(tx_node, q_node) {
if (queue >= plat->tx_queues_to_use)
break;
if (of_property_read_u32(q_node, "snps,weight",
&plat->tx_queues_cfg[queue].weight))
plat->tx_queues_cfg[queue].weight = 0x10 + queue;
if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
} else if (of_property_read_bool(q_node,
"snps,avb-algorithm")) {
plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
/* Credit Base Shaper parameters used by AVB */
if (of_property_read_u32(q_node, "snps,send_slope",
&plat->tx_queues_cfg[queue].send_slope))
plat->tx_queues_cfg[queue].send_slope = 0x0;
if (of_property_read_u32(q_node, "snps,idle_slope",
&plat->tx_queues_cfg[queue].idle_slope))
plat->tx_queues_cfg[queue].idle_slope = 0x0;
if (of_property_read_u32(q_node, "snps,high_credit",
&plat->tx_queues_cfg[queue].high_credit))
plat->tx_queues_cfg[queue].high_credit = 0x0;
if (of_property_read_u32(q_node, "snps,low_credit",
&plat->tx_queues_cfg[queue].low_credit))
plat->tx_queues_cfg[queue].low_credit = 0x0;
} else {
plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
}
if (of_property_read_u32(q_node, "snps,priority",
&plat->tx_queues_cfg[queue].prio)) {
plat->tx_queues_cfg[queue].prio = 0;
plat->tx_queues_cfg[queue].use_prio = false;
} else {
plat->tx_queues_cfg[queue].use_prio = true;
}
queue++;
}
if (queue != plat->tx_queues_to_use) {
ret = -EINVAL;
dev_err(&pdev->dev, "Not all TX queues were configured\n");
goto out;
}
out:
of_node_put(rx_node);
of_node_put(tx_node);
of_node_put(q_node);
return ret;
}
/**
* stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
* @plat: driver data platform structure
* @np: device tree node
* @dev: device pointer
* Description:
* The mdio bus will be allocated in case of a phy transceiver is on board;
* it will be NULL if the fixed-link is configured.
* If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
* in any case (for DSA, mdio must be registered even if fixed-link).
* The table below sums the supported configurations:
* -------------------------------
* snps,phy-addr | Y
* -------------------------------
* phy-handle | Y
* -------------------------------
* fixed-link | N
* -------------------------------
* snps,dwmac-mdio |
* even if | Y
* fixed-link |
* -------------------------------
*
* It returns 0 in case of success otherwise -ENODEV.
*/
static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
struct device_node *np, struct device *dev)
{
bool mdio = !of_phy_is_fixed_link(np);
static const struct of_device_id need_mdio_ids[] = {
{ .compatible = "snps,dwc-qos-ethernet-4.10" },
{},
};
if (of_match_node(need_mdio_ids, np)) {
plat->mdio_node = of_get_child_by_name(np, "mdio");
} else {
/**
* If snps,dwmac-mdio is passed from DT, always register
* the MDIO
*/
for_each_child_of_node(np, plat->mdio_node) {
if (of_device_is_compatible(plat->mdio_node,
"snps,dwmac-mdio"))
break;
}
}
if (plat->mdio_node) {
dev_dbg(dev, "Found MDIO subnode\n");
mdio = true;
}
if (mdio) {
plat->mdio_bus_data =
devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
GFP_KERNEL);
if (!plat->mdio_bus_data)
return -ENOMEM;
plat->mdio_bus_data->needs_reset = true;
}
return 0;
}
/**
* stmmac_of_get_mac_mode - retrieves the interface of the MAC
* @np: - device-tree node
* Description:
* Similar to `of_get_phy_mode()`, this function will retrieve (from
* the device-tree) the interface mode on the MAC side. This assumes
* that there is mode converter in-between the MAC & PHY
* (e.g. GMII-to-RGMII).
*/
static int stmmac_of_get_mac_mode(struct device_node *np)
{
const char *pm;
int err, i;
err = of_property_read_string(np, "mac-mode", &pm);
if (err < 0)
return err;
for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
if (!strcasecmp(pm, phy_modes(i)))
return i;
}
return -ENODEV;
}
/**
* stmmac_probe_config_dt - parse device-tree driver parameters
* @pdev: platform_device structure
* @mac: MAC address to use
* Description:
* this function is to read the driver parameters from device-tree and
* set some private fields that will be used by the main at runtime.
*/
struct plat_stmmacenet_data *
stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
{
struct device_node *np = pdev->dev.of_node;
struct plat_stmmacenet_data *plat;
struct stmmac_dma_cfg *dma_cfg;
int phy_mode;
void *ret;
int rc;
plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
if (!plat)
return ERR_PTR(-ENOMEM);
rc = of_get_mac_address(np, mac);
if (rc) {
if (rc == -EPROBE_DEFER)
return ERR_PTR(rc);
eth_zero_addr(mac);
}
phy_mode = device_get_phy_mode(&pdev->dev);
if (phy_mode < 0)
return ERR_PTR(phy_mode);
plat->phy_interface = phy_mode;
plat->interface = stmmac_of_get_mac_mode(np);
if (plat->interface < 0)
plat->interface = plat->phy_interface;
/* Some wrapper drivers still rely on phy_node. Let's save it while
* they are not converted to phylink. */
plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
/* PHYLINK automatically parses the phy-handle property */
plat->phylink_node = np;
/* Get max speed of operation from device tree */
of_property_read_u32(np, "max-speed", &plat->max_speed);
plat->bus_id = of_alias_get_id(np, "ethernet");
if (plat->bus_id < 0)
plat->bus_id = 0;
/* Default to phy auto-detection */
plat->phy_addr = -1;
/* Default to get clk_csr from stmmac_clk_csr_set(),
* or get clk_csr from device tree.
*/
plat->clk_csr = -1;
if (of_property_read_u32(np, "snps,clk-csr", &plat->clk_csr))
of_property_read_u32(np, "clk_csr", &plat->clk_csr);
/* "snps,phy-addr" is not a standard property. Mark it as deprecated
* and warn of its use. Remove this when phy node support is added.
*/
if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
/* To Configure PHY by using all device-tree supported properties */
rc = stmmac_dt_phy(plat, np, &pdev->dev);
if (rc)
return ERR_PTR(rc);
of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
plat->force_sf_dma_mode =
of_property_read_bool(np, "snps,force_sf_dma_mode");
plat->en_tx_lpi_clockgating =
of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
/* Set the maxmtu to a default of JUMBO_LEN in case the
* parameter is not present in the device tree.
*/
plat->maxmtu = JUMBO_LEN;
/* Set default value for multicast hash bins */
plat->multicast_filter_bins = HASH_TABLE_SIZE;
/* Set default value for unicast filter entries */
plat->unicast_filter_entries = 1;
/*
* Currently only the properties needed on SPEAr600
* are provided. All other properties should be added
* once needed on other platforms.
*/
if (of_device_is_compatible(np, "st,spear600-gmac") ||
of_device_is_compatible(np, "snps,dwmac-3.50a") ||
of_device_is_compatible(np, "snps,dwmac-3.70a") ||
of_device_is_compatible(np, "snps,dwmac")) {
/* Note that the max-frame-size parameter as defined in the
* ePAPR v1.1 spec is defined as max-frame-size, it's
* actually used as the IEEE definition of MAC Client
* data, or MTU. The ePAPR specification is confusing as
* the definition is max-frame-size, but usage examples
* are clearly MTUs
*/
of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
of_property_read_u32(np, "snps,multicast-filter-bins",
&plat->multicast_filter_bins);
of_property_read_u32(np, "snps,perfect-filter-entries",
&plat->unicast_filter_entries);
plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
&pdev->dev, plat->unicast_filter_entries);
plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
&pdev->dev, plat->multicast_filter_bins);
plat->has_gmac = 1;
plat->pmt = 1;
}
if (of_device_is_compatible(np, "snps,dwmac-3.40a")) {
plat->has_gmac = 1;
plat->enh_desc = 1;
plat->tx_coe = 1;
plat->bugged_jumbo = 1;
plat->pmt = 1;
}
if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
of_device_is_compatible(np, "snps,dwmac-4.10a") ||
of_device_is_compatible(np, "snps,dwmac-4.20a") ||
of_device_is_compatible(np, "snps,dwmac-5.10a") ||
of_device_is_compatible(np, "snps,dwmac-5.20")) {
plat->has_gmac4 = 1;
plat->has_gmac = 0;
plat->pmt = 1;
plat->tso_en = of_property_read_bool(np, "snps,tso");
}
if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
of_device_is_compatible(np, "snps,dwmac-3.710")) {
plat->enh_desc = 1;
plat->bugged_jumbo = 1;
plat->force_sf_dma_mode = 1;
}
if (of_device_is_compatible(np, "snps,dwxgmac")) {
plat->has_xgmac = 1;
plat->pmt = 1;
plat->tso_en = of_property_read_bool(np, "snps,tso");
}
dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
GFP_KERNEL);
if (!dma_cfg) {
stmmac_remove_config_dt(pdev, plat);
return ERR_PTR(-ENOMEM);
}
plat->dma_cfg = dma_cfg;
of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
if (!dma_cfg->pbl)
dma_cfg->pbl = DEFAULT_DMA_PBL;
of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
dma_cfg->aal = of_property_read_bool(np, "snps,aal");
dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
if (plat->force_thresh_dma_mode && plat->force_sf_dma_mode) {
plat->force_sf_dma_mode = 0;
dev_warn(&pdev->dev,
"force_sf_dma_mode is ignored if force_thresh_dma_mode is set.\n");
}
of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
plat->axi = stmmac_axi_setup(pdev);
rc = stmmac_mtl_setup(pdev, plat);
if (rc) {
stmmac_remove_config_dt(pdev, plat);
return ERR_PTR(rc);
}
/* clock setup */
if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
plat->stmmac_clk = devm_clk_get(&pdev->dev,
STMMAC_RESOURCE_NAME);
if (IS_ERR(plat->stmmac_clk)) {
dev_warn(&pdev->dev, "Cannot get CSR clock\n");
plat->stmmac_clk = NULL;
}
clk_prepare_enable(plat->stmmac_clk);
}
plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
if (IS_ERR(plat->pclk)) {
ret = plat->pclk;
goto error_pclk_get;
}
clk_prepare_enable(plat->pclk);
/* Fall-back to main clock in case of no PTP ref is passed */
plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
if (IS_ERR(plat->clk_ptp_ref)) {
plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
plat->clk_ptp_ref = NULL;
dev_info(&pdev->dev, "PTP uses main clock\n");
} else {
plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
}
plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
STMMAC_RESOURCE_NAME);
if (IS_ERR(plat->stmmac_rst)) {
ret = plat->stmmac_rst;
goto error_hw_init;
}
plat->stmmac_ahb_rst = devm_reset_control_get_optional_shared(
&pdev->dev, "ahb");
if (IS_ERR(plat->stmmac_ahb_rst)) {
ret = plat->stmmac_ahb_rst;
goto error_hw_init;
}
return plat;
error_hw_init:
clk_disable_unprepare(plat->pclk);
error_pclk_get:
clk_disable_unprepare(plat->stmmac_clk);
return ret;
}
static void devm_stmmac_remove_config_dt(void *data)
{
struct plat_stmmacenet_data *plat = data;
/* Platform data argument is unused */
stmmac_remove_config_dt(NULL, plat);
}
/**
* devm_stmmac_probe_config_dt
* @pdev: platform_device structure
* @mac: MAC address to use
* Description: Devres variant of stmmac_probe_config_dt(). Does not require
* the user to call stmmac_remove_config_dt() at driver detach.
*/
struct plat_stmmacenet_data *
devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
{
struct plat_stmmacenet_data *plat;
int ret;
plat = stmmac_probe_config_dt(pdev, mac);
if (IS_ERR(plat))
return plat;
ret = devm_add_action_or_reset(&pdev->dev,
devm_stmmac_remove_config_dt, plat);
if (ret)
return ERR_PTR(ret);
return plat;
}
/**
* stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
* @pdev: platform_device structure
* @plat: driver data platform structure
*
* Release resources claimed by stmmac_probe_config_dt().
*/
void stmmac_remove_config_dt(struct platform_device *pdev,
struct plat_stmmacenet_data *plat)
{
clk_disable_unprepare(plat->stmmac_clk);
clk_disable_unprepare(plat->pclk);
of_node_put(plat->phy_node);
of_node_put(plat->mdio_node);
}
#else
struct plat_stmmacenet_data *
stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
{
return ERR_PTR(-EINVAL);
}
struct plat_stmmacenet_data *
devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
{
return ERR_PTR(-EINVAL);
}
void stmmac_remove_config_dt(struct platform_device *pdev,
struct plat_stmmacenet_data *plat)
{
}
#endif /* CONFIG_OF */
EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
EXPORT_SYMBOL_GPL(devm_stmmac_probe_config_dt);
EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
int stmmac_get_platform_resources(struct platform_device *pdev,
struct stmmac_resources *stmmac_res)
{
memset(stmmac_res, 0, sizeof(*stmmac_res));
/* Get IRQ information early to have an ability to ask for deferred
* probe if needed before we went too far with resource allocation.
*/
stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
if (stmmac_res->irq < 0)
return stmmac_res->irq;
/* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
* The external wake up irq can be passed through the platform code
* named as "eth_wake_irq"
*
* In case the wake up interrupt is not passed from the platform
* so the driver will continue to use the mac irq (ndev->irq)
*/
stmmac_res->wol_irq =
platform_get_irq_byname_optional(pdev, "eth_wake_irq");
if (stmmac_res->wol_irq < 0) {
if (stmmac_res->wol_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n");
stmmac_res->wol_irq = stmmac_res->irq;
}
stmmac_res->lpi_irq =
platform_get_irq_byname_optional(pdev, "eth_lpi");
if (stmmac_res->lpi_irq < 0) {
if (stmmac_res->lpi_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
}
stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0);
return PTR_ERR_OR_ZERO(stmmac_res->addr);
}
EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
/**
* stmmac_pltfr_init
* @pdev: pointer to the platform device
* @plat: driver data platform structure
* Description: Call the platform's init callback (if any) and propagate
* the return value.
*/
int stmmac_pltfr_init(struct platform_device *pdev,
struct plat_stmmacenet_data *plat)
{
int ret = 0;
if (plat->init)
ret = plat->init(pdev, plat->bsp_priv);
return ret;
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_init);
/**
* stmmac_pltfr_exit
* @pdev: pointer to the platform device
* @plat: driver data platform structure
* Description: Call the platform's exit callback (if any).
*/
void stmmac_pltfr_exit(struct platform_device *pdev,
struct plat_stmmacenet_data *plat)
{
if (plat->exit)
plat->exit(pdev, plat->bsp_priv);
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_exit);
/**
* stmmac_pltfr_probe
* @pdev: platform device pointer
* @plat: driver data platform structure
* @res: stmmac resources structure
* Description: This calls the platform's init() callback and probes the
* stmmac driver.
*/
int stmmac_pltfr_probe(struct platform_device *pdev,
struct plat_stmmacenet_data *plat,
struct stmmac_resources *res)
{
int ret;
ret = stmmac_pltfr_init(pdev, plat);
if (ret)
return ret;
ret = stmmac_dvr_probe(&pdev->dev, plat, res);
if (ret) {
stmmac_pltfr_exit(pdev, plat);
return ret;
}
return ret;
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_probe);
static void devm_stmmac_pltfr_remove(void *data)
{
struct platform_device *pdev = data;
stmmac_pltfr_remove_no_dt(pdev);
}
/**
* devm_stmmac_pltfr_probe
* @pdev: pointer to the platform device
* @plat: driver data platform structure
* @res: stmmac resources
* Description: Devres variant of stmmac_pltfr_probe(). Allows users to skip
* calling stmmac_pltfr_remove() on driver detach.
*/
int devm_stmmac_pltfr_probe(struct platform_device *pdev,
struct plat_stmmacenet_data *plat,
struct stmmac_resources *res)
{
int ret;
ret = stmmac_pltfr_probe(pdev, plat, res);
if (ret)
return ret;
return devm_add_action_or_reset(&pdev->dev, devm_stmmac_pltfr_remove,
pdev);
}
EXPORT_SYMBOL_GPL(devm_stmmac_pltfr_probe);
/**
* stmmac_pltfr_remove_no_dt
* @pdev: pointer to the platform device
* Description: This undoes the effects of stmmac_pltfr_probe() by removing the
* driver and calling the platform's exit() callback.
*/
void stmmac_pltfr_remove_no_dt(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct stmmac_priv *priv = netdev_priv(ndev);
struct plat_stmmacenet_data *plat = priv->plat;
stmmac_dvr_remove(&pdev->dev);
stmmac_pltfr_exit(pdev, plat);
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_remove_no_dt);
/**
* stmmac_pltfr_remove
* @pdev: platform device pointer
* Description: this function calls the main to free the net resources
* and calls the platforms hook and release the resources (e.g. mem).
*/
void stmmac_pltfr_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct stmmac_priv *priv = netdev_priv(ndev);
struct plat_stmmacenet_data *plat = priv->plat;
stmmac_pltfr_remove_no_dt(pdev);
stmmac_remove_config_dt(pdev, plat);
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
/**
* stmmac_pltfr_suspend
* @dev: device pointer
* Description: this function is invoked when suspend the driver and it direcly
* call the main suspend function and then, if required, on some platform, it
* can call an exit helper.
*/
static int __maybe_unused stmmac_pltfr_suspend(struct device *dev)
{
int ret;
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
struct platform_device *pdev = to_platform_device(dev);
ret = stmmac_suspend(dev);
stmmac_pltfr_exit(pdev, priv->plat);
return ret;
}
/**
* stmmac_pltfr_resume
* @dev: device pointer
* Description: this function is invoked when resume the driver before calling
* the main resume function, on some platforms, it can call own init helper
* if required.
*/
static int __maybe_unused stmmac_pltfr_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
struct platform_device *pdev = to_platform_device(dev);
int ret;
ret = stmmac_pltfr_init(pdev, priv->plat->bsp_priv);
if (ret)
return ret;
return stmmac_resume(dev);
}
static int __maybe_unused stmmac_runtime_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
stmmac_bus_clks_config(priv, false);
return 0;
}
static int __maybe_unused stmmac_runtime_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
return stmmac_bus_clks_config(priv, true);
}
static int __maybe_unused stmmac_pltfr_noirq_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
int ret;
if (!netif_running(ndev))
return 0;
if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
/* Disable clock in case of PWM is off */
clk_disable_unprepare(priv->plat->clk_ptp_ref);
ret = pm_runtime_force_suspend(dev);
if (ret)
return ret;
}
return 0;
}
static int __maybe_unused stmmac_pltfr_noirq_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
int ret;
if (!netif_running(ndev))
return 0;
if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
/* enable the clk previously disabled */
ret = pm_runtime_force_resume(dev);
if (ret)
return ret;
ret = clk_prepare_enable(priv->plat->clk_ptp_ref);
if (ret < 0) {
netdev_warn(priv->dev,
"failed to enable PTP reference clock: %pe\n",
ERR_PTR(ret));
return ret;
}
}
return 0;
}
const struct dev_pm_ops stmmac_pltfr_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_suspend, stmmac_pltfr_resume)
SET_RUNTIME_PM_OPS(stmmac_runtime_suspend, stmmac_runtime_resume, NULL)
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_noirq_suspend, stmmac_pltfr_noirq_resume)
};
EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
MODULE_LICENSE("GPL");
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