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 <common.h>
9 #include <asm/global_data.h>
10 #include <asm/io.h>
11 #include <dm.h>
12 #include <clk.h>
13 #include <phy.h>
14 #include <regmap.h>
15 #include <reset.h>
16 #include <syscon.h>
17 #include "designware.h"
18 #include <asm/arch-owl/regs_s700.h>
19 #include <linux/bitops.h>
20
21 /* pin control for MAC */
22 #define RMII_TXD01_MFP_CTL0 (0x0 << 16)
23 #define RMII_RXD01_MFP_CTL0 (0x0 << 8)
24 #define RMII_TXEN_TXER_MFP_CTL0 (0x0 << 13)
25 #define RMII_REF_CLK_MFP_CTL0 (0x0 << 6)
26 #define CLKO_25M_EN_MFP_CTL3 BIT(30)
27
28 DECLARE_GLOBAL_DATA_PTR;
29
dwmac_board_setup(void)30 static void dwmac_board_setup(void)
31 {
32 clrbits_le32(MFP_CTL0, (RMII_TXD01_MFP_CTL0 | RMII_RXD01_MFP_CTL0 |
33 RMII_TXEN_TXER_MFP_CTL0 | RMII_REF_CLK_MFP_CTL0));
34
35 setbits_le32(MFP_CTL3, CLKO_25M_EN_MFP_CTL3);
36 }
37
dwmac_s700_probe(struct udevice * dev)38 static int dwmac_s700_probe(struct udevice *dev)
39 {
40 dwmac_board_setup();
41
42 /* This is undocumented, phy interface select register */
43 writel(0x4, 0xe024c0a0);
44
45 return designware_eth_probe(dev);
46 }
47
dwmac_s700_of_to_plat(struct udevice * dev)48 static int dwmac_s700_of_to_plat(struct udevice *dev)
49 {
50 return designware_eth_of_to_plat(dev);
51 }
52
53 static const struct udevice_id dwmac_s700_ids[] = {
54 {.compatible = "actions,s700-ethernet"},
55 { }
56 };
57
58 U_BOOT_DRIVER(dwmac_s700) = {
59 .name = "dwmac_s700",
60 .id = UCLASS_ETH,
61 .of_match = dwmac_s700_ids,
62 .of_to_plat = dwmac_s700_of_to_plat,
63 .probe = dwmac_s700_probe,
64 .ops = &designware_eth_ops,
65 .priv_auto = sizeof(struct dw_eth_dev),
66 .plat_auto = sizeof(struct eth_pdata),
67 .flags = DM_FLAG_ALLOC_PRIV_DMA,
68 };
69