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(0x83, UART1_REG(LCR));
33 writel(divisor & 0xff, UART1_REG(DLL));
34 writel((divisor >> 8) & 0xff, UART1_REG(DLM));
35 writel(0x03, UART1_REG(LCR));
36 writel(0x00, UART1_REG(IER));
37 writel(0x00, UART1_REG(FCR));
38 writel(0x00, UART1_REG(MCR));
39
40 /* send the power-off command 'A' to PIC */
41 writel('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 >= '' && n <= '9')
55 return n - '';
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(b[0]);
72 lo = qnap_tsx09_parse_hex_nibble(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(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(addr, 1024);
121 if (nor_page != NULL) {
122 ret = qnap_tsx09_check_mac_addr(nor_page);
123 iounmap(nor_page);
124 }
125
126 if (ret == 0)
127 break;
128 }
129 }
130
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