1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2020 Amit Singh Tomar <amittomer25@gmail.com>
4 *
5 * Actions DWMAC specific glue layer
6 */
7
8 #include <asm/global_data.h>
9 #include <asm/io.h>
10 #include <dm.h>
11 #include <clk.h>
12 #include <phy.h>
13 #include <regmap.h>
14 #include <reset.h>
15 #include <syscon.h>
16 #include "designware.h"
17 #include <asm/arch-owl/regs_s700.h>
18 #include <linux/bitops.h>
19
20 /* pin control for MAC */
21 #define RMII_TXD01_MFP_CTL0 (0x0 << 16)
22 #define RMII_RXD01_MFP_CTL0 (0x0 << 8)
23 #define RMII_TXEN_TXER_MFP_CTL0 (0x0 << 13)
24 #define RMII_REF_CLK_MFP_CTL0 (0x0 << 6)
25 #define CLKO_25M_EN_MFP_CTL3 BIT(30)
26
27 DECLARE_GLOBAL_DATA_PTR;
28
dwmac_board_setup(void)29 static void dwmac_board_setup(void)
30 {
31 clrbits_le32(MFP_CTL0, (RMII_TXD01_MFP_CTL0 | RMII_RXD01_MFP_CTL0 |
32 RMII_TXEN_TXER_MFP_CTL0 | RMII_REF_CLK_MFP_CTL0));
33
34 setbits_le32(MFP_CTL3, CLKO_25M_EN_MFP_CTL3);
35 }
36
dwmac_s700_probe(struct udevice * dev)37 static int dwmac_s700_probe(struct udevice *dev)
38 {
39 dwmac_board_setup();
40
41 /* This is undocumented, phy interface select register */
42 writel(0x4, 0xe024c0a0);
43
44 return designware_eth_probe(dev);
45 }
46
dwmac_s700_of_to_plat(struct udevice * dev)47 static int dwmac_s700_of_to_plat(struct udevice *dev)
48 {
49 return designware_eth_of_to_plat(dev);
50 }
51
52 static const struct udevice_id dwmac_s700_ids[] = {
53 {.compatible = "actions,s700-ethernet"},
54 { }
55 };
56
57 U_BOOT_DRIVER(dwmac_s700) = {
58 .name = "dwmac_s700",
59 .id = UCLASS_ETH,
60 .of_match = dwmac_s700_ids,
61 .of_to_plat = dwmac_s700_of_to_plat,
62 .probe = dwmac_s700_probe,
63 .ops = &designware_eth_ops,
64 .priv_auto = sizeof(struct dw_eth_dev),
65 .plat_auto = sizeof(struct eth_pdata),
66 .flags = DM_FLAG_ALLOC_PRIV_DMA,
67 };
68