1 /*
2 * QNAP TS-x09 Boards common functions
3 *
4 * Maintainers: Lennert Buytenhek <buytenh@marvell.com>
5 * Byron Bradley <byron.bbradley@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/mv643xx_eth.h>
16 #include <linux/timex.h>
17 #include <linux/serial_reg.h>
18 #include "tsx09-common.h"
19 #include "common.h"
20
21 /*****************************************************************************
22 * QNAP TS-x09 specific power off method via UART1-attached PIC
23 ****************************************************************************/
24
25 #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
26
27 void qnap_tsx09_power_off(void)
28 {
29 /* 19200 baud divisor */
30 const unsigned divisor = ((orion5x_tclk + (8 * 19200)) / (16 * 19200));
31
32 pr_info("%s: triggering power-off...\n", __func__);
33
34 /* hijack uart1 and reset into sane state (19200,8n1) */
35 writel(0x83, UART1_REG(LCR));
36 writel(divisor & 0xff, UART1_REG(DLL));
37 writel((divisor >> 8) & 0xff, UART1_REG(DLM));
38 writel(0x03, UART1_REG(LCR));
39 writel(0x00, UART1_REG(IER));
40 writel(0x00, UART1_REG(FCR));
41 writel(0x00, UART1_REG(MCR));
42
43 /* send the power-off command 'A' to PIC */
44 writel('A', UART1_REG(TX));
45 }
46
47 /*****************************************************************************
48 * Ethernet
49 ****************************************************************************/
50
51 struct mv643xx_eth_platform_data qnap_tsx09_eth_data = {
52 .phy_addr = MV643XX_ETH_PHY_ADDR(8),
53 };
54
55 static int __init qnap_tsx09_parse_hex_nibble(char n)
56 {
57 if (n >= '' && n <= '9')
58 return n - '';
59
60 if (n >= 'A' && n <= 'F')
61 return n - 'A' + 10;
62
63 if (n >= 'a' && n <= 'f')
64 return n - 'a' + 10;
65
66 return -1;
67 }
68
69 static int __init qnap_tsx09_parse_hex_byte(const char *b)
70 {
71 int hi;
72 int lo;
73
74 hi = qnap_tsx09_parse_hex_nibble(b[0]);
75 lo = qnap_tsx09_parse_hex_nibble(b[1]);
76
77 if (hi < 0 || lo < 0)
78 return -1;
79
80 return (hi << 4) | lo;
81 }
82
83 static int __init qnap_tsx09_check_mac_addr(const char *addr_str)
84 {
85 u_int8_t addr[6];
86 int i;
87
88 for (i = 0; i < 6; i++) {
89 int byte;
90
91 /*
92 * Enforce "xx:xx:xx:xx:xx:xx\n" format.
93 */
94 if (addr_str[(i * 3) + 2] != ((i < 5) ? ':' : '\n'))
95 return -1;
96
97 byte = qnap_tsx09_parse_hex_byte(addr_str + (i * 3));
98 if (byte < 0)
99 return -1;
100 addr[i] = byte;
101 }
102
103 printk(KERN_INFO "tsx09: found ethernet mac address ");
104 for (i = 0; i < 6; i++)
105 printk("%.2x%s", addr[i], (i < 5) ? ":" : ".\n");
106
107 memcpy(qnap_tsx09_eth_data.mac_addr, addr, 6);
108
109 return 0;
110 }
111
112 /*
113 * The 'NAS Config' flash partition has an ext2 filesystem which
114 * contains a file that has the ethernet MAC address in plain text
115 * (format "xx:xx:xx:xx:xx:xx\n").
116 */
117 void __init qnap_tsx09_find_mac_addr(u32 mem_base, u32 size)
118 {
119 unsigned long addr;
120
121 for (addr = mem_base; addr < (mem_base + size); addr += 1024) {
122 char *nor_page;
123 int ret = 0;
124
125 nor_page = ioremap(addr, 1024);
126 if (nor_page != NULL) {
127 ret = qnap_tsx09_check_mac_addr(nor_page);
128 iounmap(nor_page);
129 }
130
131 if (ret == 0)
132 break;
133 }
134 }
135
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