1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
3 
4 #include <linux/etherdevice.h>
5 #include <linux/iopoll.h>
6 #include <linux/pci.h>
7 
8 #include "../libwx/wx_type.h"
9 #include "../libwx/wx_hw.h"
10 #include "ngbe_type.h"
11 #include "ngbe_hw.h"
12 
13 int ngbe_eeprom_chksum_hostif(struct wx *wx)
14 {
15 	struct wx_hic_read_shadow_ram buffer;
16 	int status;
17 	int tmp;
18 
19 	buffer.hdr.req.cmd = NGBE_FW_EEPROM_CHECKSUM_CMD;
20 	buffer.hdr.req.buf_lenh = 0;
21 	buffer.hdr.req.buf_lenl = 0;
22 	buffer.hdr.req.checksum = NGBE_FW_CMD_DEFAULT_CHECKSUM;
23 	/* convert offset from words to bytes */
24 	buffer.address = 0;
25 	/* one word */
26 	buffer.length = 0;
27 
28 	status = wx_host_interface_command(wx, (u32 *)&buffer, sizeof(buffer),
29 					   WX_HI_COMMAND_TIMEOUT, false);
30 
31 	if (status < 0)
32 		return status;
33 	tmp = rd32a(wx, WX_MNG_MBOX, 1);
34 	if (tmp == NGBE_FW_CMD_ST_PASS)
35 		return 0;
36 	return -EIO;
37 }
38 
39 static int ngbe_reset_misc(struct wx *wx)
40 {
41 	wx_reset_misc(wx);
42 	if (wx->gpio_ctrl) {
43 		/* gpio0 is used to power on/off control*/
44 		wr32(wx, NGBE_GPIO_DDR, 0x1);
45 		ngbe_sfp_modules_txrx_powerctl(wx, false);
46 	}
47 	return 0;
48 }
49 
50 void ngbe_sfp_modules_txrx_powerctl(struct wx *wx, bool swi)
51 {
52 	/* gpio0 is used to power on control . 0 is on */
53 	wr32(wx, NGBE_GPIO_DR, swi ? 0 : NGBE_GPIO_DR_0);
54 }
55 
56 /**
57  *  ngbe_reset_hw - Perform hardware reset
58  *  @wx: pointer to hardware structure
59  *
60  *  Resets the hardware by resetting the transmit and receive units, masks
61  *  and clears all interrupts, perform a PHY reset, and perform a link (MAC)
62  *  reset.
63  **/
64 int ngbe_reset_hw(struct wx *wx)
65 {
66 	u32 val = 0;
67 	int ret = 0;
68 
69 	/* Call wx stop to disable tx/rx and clear interrupts */
70 	ret = wx_stop_adapter(wx);
71 	if (ret != 0)
72 		return ret;
73 
74 	if (wx->mac_type != em_mac_type_mdi) {
75 		val = WX_MIS_RST_LAN_RST(wx->bus.func);
76 		wr32(wx, WX_MIS_RST, val | rd32(wx, WX_MIS_RST));
77 
78 		ret = read_poll_timeout(rd32, val,
79 					!(val & (BIT(9) << wx->bus.func)), 1000,
80 					100000, false, wx, 0x10028);
81 		if (ret) {
82 			wx_err(wx, "Lan reset exceed s maximum times.\n");
83 			return ret;
84 		}
85 	}
86 	ngbe_reset_misc(wx);
87 
88 	/* Store the permanent mac address */
89 	wx_get_mac_addr(wx, wx->mac.perm_addr);
90 
91 	/* reset num_rar_entries to 128 */
92 	wx->mac.num_rar_entries = NGBE_RAR_ENTRIES;
93 	wx_init_rx_addrs(wx);
94 	pci_set_master(wx->pdev);
95 
96 	return 0;
97 }
98