1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * QNAP TS-x09 Boards common functions |
4 | * |
5 | * Maintainers: Lennert Buytenhek <buytenh@marvell.com> |
6 | * Byron Bradley <byron.bbradley@gmail.com> |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/pci.h> |
11 | #include <linux/mv643xx_eth.h> |
12 | #include <linux/timex.h> |
13 | #include <linux/serial_reg.h> |
14 | #include "orion5x.h" |
15 | #include "tsx09-common.h" |
16 | #include "common.h" |
17 | |
18 | /***************************************************************************** |
19 | * QNAP TS-x09 specific power off method via UART1-attached PIC |
20 | ****************************************************************************/ |
21 | |
22 | #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2)) |
23 | |
24 | void qnap_tsx09_power_off(void) |
25 | { |
26 | /* 19200 baud divisor */ |
27 | const unsigned divisor = ((orion5x_tclk + (8 * 19200)) / (16 * 19200)); |
28 | |
29 | pr_info("%s: triggering power-off...\n" , __func__); |
30 | |
31 | /* hijack uart1 and reset into sane state (19200,8n1) */ |
32 | writel(val: 0x83, UART1_REG(LCR)); |
33 | writel(val: divisor & 0xff, UART1_REG(DLL)); |
34 | writel(val: (divisor >> 8) & 0xff, UART1_REG(DLM)); |
35 | writel(val: 0x03, UART1_REG(LCR)); |
36 | writel(val: 0x00, UART1_REG(IER)); |
37 | writel(val: 0x00, UART1_REG(FCR)); |
38 | writel(val: 0x00, UART1_REG(MCR)); |
39 | |
40 | /* send the power-off command 'A' to PIC */ |
41 | writel(val: 'A', UART1_REG(TX)); |
42 | } |
43 | |
44 | /***************************************************************************** |
45 | * Ethernet |
46 | ****************************************************************************/ |
47 | |
48 | struct mv643xx_eth_platform_data qnap_tsx09_eth_data = { |
49 | .phy_addr = MV643XX_ETH_PHY_ADDR(8), |
50 | }; |
51 | |
52 | static int __init qnap_tsx09_parse_hex_nibble(char n) |
53 | { |
54 | if (n >= '0' && n <= '9') |
55 | return n - '0'; |
56 | |
57 | if (n >= 'A' && n <= 'F') |
58 | return n - 'A' + 10; |
59 | |
60 | if (n >= 'a' && n <= 'f') |
61 | return n - 'a' + 10; |
62 | |
63 | return -1; |
64 | } |
65 | |
66 | static int __init qnap_tsx09_parse_hex_byte(const char *b) |
67 | { |
68 | int hi; |
69 | int lo; |
70 | |
71 | hi = qnap_tsx09_parse_hex_nibble(n: b[0]); |
72 | lo = qnap_tsx09_parse_hex_nibble(n: b[1]); |
73 | |
74 | if (hi < 0 || lo < 0) |
75 | return -1; |
76 | |
77 | return (hi << 4) | lo; |
78 | } |
79 | |
80 | static int __init qnap_tsx09_check_mac_addr(const char *addr_str) |
81 | { |
82 | u_int8_t addr[6]; |
83 | int i; |
84 | |
85 | for (i = 0; i < 6; i++) { |
86 | int byte; |
87 | |
88 | /* |
89 | * Enforce "xx:xx:xx:xx:xx:xx\n" format. |
90 | */ |
91 | if (addr_str[(i * 3) + 2] != ((i < 5) ? ':' : '\n')) |
92 | return -1; |
93 | |
94 | byte = qnap_tsx09_parse_hex_byte(b: addr_str + (i * 3)); |
95 | if (byte < 0) |
96 | return -1; |
97 | addr[i] = byte; |
98 | } |
99 | |
100 | printk(KERN_INFO "tsx09: found ethernet mac address %pM\n" , addr); |
101 | |
102 | memcpy(qnap_tsx09_eth_data.mac_addr, addr, 6); |
103 | |
104 | return 0; |
105 | } |
106 | |
107 | /* |
108 | * The 'NAS Config' flash partition has an ext2 filesystem which |
109 | * contains a file that has the ethernet MAC address in plain text |
110 | * (format "xx:xx:xx:xx:xx:xx\n"). |
111 | */ |
112 | void __init qnap_tsx09_find_mac_addr(u32 mem_base, u32 size) |
113 | { |
114 | unsigned long addr; |
115 | |
116 | for (addr = mem_base; addr < (mem_base + size); addr += 1024) { |
117 | char *nor_page; |
118 | int ret = 0; |
119 | |
120 | nor_page = ioremap(offset: addr, size: 1024); |
121 | if (nor_page != NULL) { |
122 | ret = qnap_tsx09_check_mac_addr(addr_str: nor_page); |
123 | iounmap(addr: nor_page); |
124 | } |
125 | |
126 | if (ret == 0) |
127 | break; |
128 | } |
129 | } |
130 | |