26a9ebca98
This reverts commit 0acf167687.
Breaks the build due to missing reference to phy_resume in
the resulting dwmac-socfpga.o object.
Signed-off-by: David S. Miller <davem@davemloft.net>
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* Copyright Altera Corporation (C) 2014. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Adopted from dwmac-sti.c
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/phy.h>
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#include <linux/regmap.h>
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#include <linux/stmmac.h>
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#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
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#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
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#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
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#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
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#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
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struct socfpga_dwmac {
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int interface;
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u32 reg_offset;
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u32 reg_shift;
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struct device *dev;
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struct regmap *sys_mgr_base_addr;
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};
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static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
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{
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struct device_node *np = dev->of_node;
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struct regmap *sys_mgr_base_addr;
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u32 reg_offset, reg_shift;
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int ret;
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dwmac->interface = of_get_phy_mode(np);
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sys_mgr_base_addr = syscon_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
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if (IS_ERR(sys_mgr_base_addr)) {
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dev_info(dev, "No sysmgr-syscon node found\n");
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return PTR_ERR(sys_mgr_base_addr);
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}
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ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset);
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if (ret) {
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dev_info(dev, "Could not read reg_offset from sysmgr-syscon!\n");
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return -EINVAL;
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}
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ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift);
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if (ret) {
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dev_info(dev, "Could not read reg_shift from sysmgr-syscon!\n");
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return -EINVAL;
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}
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dwmac->reg_offset = reg_offset;
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dwmac->reg_shift = reg_shift;
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dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
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dwmac->dev = dev;
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return 0;
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}
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static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
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{
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struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
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int phymode = dwmac->interface;
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u32 reg_offset = dwmac->reg_offset;
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u32 reg_shift = dwmac->reg_shift;
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u32 ctrl, val;
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switch (phymode) {
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case PHY_INTERFACE_MODE_RGMII:
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val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
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break;
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case PHY_INTERFACE_MODE_MII:
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case PHY_INTERFACE_MODE_GMII:
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val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
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break;
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default:
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dev_err(dwmac->dev, "bad phy mode %d\n", phymode);
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return -EINVAL;
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}
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regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
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ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
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ctrl |= val << reg_shift;
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regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
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return 0;
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}
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static void *socfpga_dwmac_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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int ret;
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struct socfpga_dwmac *dwmac;
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dwmac = devm_kzalloc(dev, sizeof(*dwmac), GFP_KERNEL);
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if (!dwmac)
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return ERR_PTR(-ENOMEM);
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ret = socfpga_dwmac_parse_data(dwmac, dev);
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if (ret) {
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dev_err(dev, "Unable to parse OF data\n");
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return ERR_PTR(ret);
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}
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ret = socfpga_dwmac_setup(dwmac);
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if (ret) {
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dev_err(dev, "couldn't setup SoC glue (%d)\n", ret);
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return ERR_PTR(ret);
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}
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return dwmac;
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}
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const struct stmmac_of_data socfpga_gmac_data = {
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.setup = socfpga_dwmac_probe,
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};
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