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 >= '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(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