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 27void 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 51struct mv643xx_eth_platform_data qnap_tsx09_eth_data = { 52 .phy_addr = MV643XX_ETH_PHY_ADDR(8), 53}; 54 55static int __init qnap_tsx09_parse_hex_nibble(char n) 56{ 57 if (n >= '0' && n <= '9') 58 return n - '0'; 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 69static 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 83static 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 */ 117void __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