cregit-Linux how code gets into the kernel

Release 4.16 arch/arm/mach-orion5x/tsx09-common.c

/*
 * QNAP TS-x09 Boards common functions
 *
 * Maintainers: Lennert Buytenhek <buytenh@marvell.com>
 *              Byron Bradley <byron.bbradley@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/mv643xx_eth.h>
#include <linux/timex.h>
#include <linux/serial_reg.h>
#include "orion5x.h"
#include "tsx09-common.h"
#include "common.h"

/*****************************************************************************
 * QNAP TS-x09 specific power off method via UART1-attached PIC
 ****************************************************************************/


#define UART1_REG(x)	(UART1_VIRT_BASE + ((UART_##x) << 2))


void qnap_tsx09_power_off(void) { /* 19200 baud divisor */ const unsigned divisor = ((orion5x_tclk + (8 * 19200)) / (16 * 19200)); pr_info("%s: triggering power-off...\n", __func__); /* hijack uart1 and reset into sane state (19200,8n1) */ writel(0x83, UART1_REG(LCR)); writel(divisor & 0xff, UART1_REG(DLL)); writel((divisor >> 8) & 0xff, UART1_REG(DLM)); writel(0x03, UART1_REG(LCR)); writel(0x00, UART1_REG(IER)); writel(0x00, UART1_REG(FCR)); writel(0x00, UART1_REG(MCR)); /* send the power-off command 'A' to PIC */ writel('A', UART1_REG(TX)); }

Contributors

PersonTokensPropCommitsCommitProp
Sylver Bruneau12699.21%150.00%
Lennert Buytenhek10.79%150.00%
Total127100.00%2100.00%

/***************************************************************************** * Ethernet ****************************************************************************/ struct mv643xx_eth_platform_data qnap_tsx09_eth_data = { .phy_addr = MV643XX_ETH_PHY_ADDR(8), };
static int __init qnap_tsx09_parse_hex_nibble(char n) { if (n >= '0' && n <= '9') return n - '0'; if (n >= 'A' && n <= 'F') return n - 'A' + 10; if (n >= 'a' && n <= 'f') return n - 'a' + 10; return -1; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller63100.00%1100.00%
Total63100.00%1100.00%


static int __init qnap_tsx09_parse_hex_byte(const char *b) { int hi; int lo; hi = qnap_tsx09_parse_hex_nibble(b[0]); lo = qnap_tsx09_parse_hex_nibble(b[1]); if (hi < 0 || lo < 0) return -1; return (hi << 4) | lo; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller61100.00%1100.00%
Total61100.00%1100.00%


static int __init qnap_tsx09_check_mac_addr(const char *addr_str) { u_int8_t addr[6]; int i; for (i = 0; i < 6; i++) { int byte; /* * Enforce "xx:xx:xx:xx:xx:xx\n" format. */ if (addr_str[(i * 3) + 2] != ((i < 5) ? ':' : '\n')) return -1; byte = qnap_tsx09_parse_hex_byte(addr_str + (i * 3)); if (byte < 0) return -1; addr[i] = byte; } printk(KERN_INFO "tsx09: found ethernet mac address %pM\n", addr); memcpy(qnap_tsx09_eth_data.mac_addr, addr, 6); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller7158.68%133.33%
Sylver Bruneau4940.50%133.33%
Joe Perches10.83%133.33%
Total121100.00%3100.00%

/* * The 'NAS Config' flash partition has an ext2 filesystem which * contains a file that has the ethernet MAC address in plain text * (format "xx:xx:xx:xx:xx:xx\n"). */
void __init qnap_tsx09_find_mac_addr(u32 mem_base, u32 size) { unsigned long addr; for (addr = mem_base; addr < (mem_base + size); addr += 1024) { char *nor_page; int ret = 0; nor_page = ioremap(addr, 1024); if (nor_page != NULL) { ret = qnap_tsx09_check_mac_addr(nor_page); iounmap(nor_page); } if (ret == 0) break; } }

Contributors

PersonTokensPropCommitsCommitProp
Sylver Bruneau8098.77%150.00%
David S. Miller11.23%150.00%
Total81100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Sylver Bruneau29558.76%225.00%
David S. Miller19639.04%112.50%
Lennert Buytenhek71.39%225.00%
Rob Herring20.40%112.50%
Joe Perches10.20%112.50%
Arnd Bergmann10.20%112.50%
Total502100.00%8100.00%
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