LXR linux/arch/arm/mach-orion5x/tsx09-common.c

   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