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 "orion5x.h"
19 #include "tsx09-common.h"
20 #include "common.h"
21 
22 /*****************************************************************************
23  * QNAP TS-x09 specific power off method via UART1-attached PIC
24  ****************************************************************************/
25 
26 #define UART1_REG(x)	(UART1_VIRT_BASE + ((UART_##x) << 2))
27 
28 void qnap_tsx09_power_off(void)
29 {
30 	/* 19200 baud divisor */
31 	const unsigned divisor = ((orion5x_tclk + (8 * 19200)) / (16 * 19200));
32 
33 	pr_info("%s: triggering power-off...\n", __func__);
34 
35 	/* hijack uart1 and reset into sane state (19200,8n1) */
36 	writel(0x83, UART1_REG(LCR));
37 	writel(divisor & 0xff, UART1_REG(DLL));
38 	writel((divisor >> 8) & 0xff, UART1_REG(DLM));
39 	writel(0x03, UART1_REG(LCR));
40 	writel(0x00, UART1_REG(IER));
41 	writel(0x00, UART1_REG(FCR));
42 	writel(0x00, UART1_REG(MCR));
43 
44 	/* send the power-off command 'A' to PIC */
45 	writel('A', UART1_REG(TX));
46 }
47 
48 /*****************************************************************************
49  * Ethernet
50  ****************************************************************************/
51 
52 struct mv643xx_eth_platform_data qnap_tsx09_eth_data = {
53 	.phy_addr	= MV643XX_ETH_PHY_ADDR(8),
54 };
55 
56 static int __init qnap_tsx09_check_mac_addr(const char *addr_str)
57 {
58 	u_int8_t addr[6];
59 
60 	if (!mac_pton(addr_str, addr))
61 		return -1;
62 
63 	printk(KERN_INFO "tsx09: found ethernet mac address %pM\n", addr);
64 
65 	memcpy(qnap_tsx09_eth_data.mac_addr, addr, 6);
66 
67 	return 0;
68 }
69 
70 /*
71  * The 'NAS Config' flash partition has an ext2 filesystem which
72  * contains a file that has the ethernet MAC address in plain text
73  * (format "xx:xx:xx:xx:xx:xx\n").
74  */
75 void __init qnap_tsx09_find_mac_addr(u32 mem_base, u32 size)
76 {
77 	unsigned long addr;
78 
79 	for (addr = mem_base; addr < (mem_base + size); addr += 1024) {
80 		void __iomem *nor_page;
81 		int ret = 0;
82 
83 		nor_page = ioremap(addr, 1024);
84 		if (nor_page != NULL) {
85 			ret = qnap_tsx09_check_mac_addr((__force const char *)nor_page);
86 			iounmap(nor_page);
87 		}
88 
89 		if (ret == 0)
90 			break;
91 	}
92 }
93