cregit-Linux how code gets into the kernel

Release 4.7 drivers/firmware/pcdp.c

Directory: drivers/firmware
/*
 * Parse the EFI PCDP table to locate the console device.
 *
 * (c) Copyright 2002, 2003, 2004 Hewlett-Packard Development Company, L.P.
 *      Khalid Aziz <khalid.aziz@hp.com>
 *      Alex Williamson <alex.williamson@hp.com>
 *      Bjorn Helgaas <bjorn.helgaas@hp.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/acpi.h>
#include <linux/console.h>
#include <linux/efi.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <asm/vga.h>
#include "pcdp.h"


static int __init setup_serial_console(struct pcdp_uart *uart) { #ifdef CONFIG_SERIAL_8250_CONSOLE int mmio; static char options[64], *p = options; char parity; mmio = (uart->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY); p += sprintf(p, "uart8250,%s,0x%llx", mmio ? "mmio" : "io", uart->addr.address); if (uart->baud) { p += sprintf(p, ",%llu", uart->baud); if (uart->bits) { switch (uart->parity) { case 0x2: parity = 'e'; break; case 0x3: parity = 'o'; break; default: parity = 'n'; } p += sprintf(p, "%c%d", parity, uart->bits); } } add_preferred_console("uart", 8250, &options[9]); return setup_earlycon(options); #else return -ENODEV; #endif }

Contributors

PersonTokensPropCommitsCommitProp
bjorn helgaasbjorn helgaas13078.31%654.55%
christoph hellwigchristoph hellwig1911.45%19.09%
yinghai luyinghai lu137.83%19.09%
matthew wilcoxmatthew wilcox21.20%19.09%
alexey starikovskiyalexey starikovskiy10.60%19.09%
peter hurleypeter hurley10.60%19.09%
Total166100.00%11100.00%


static int __init setup_vga_console(struct pcdp_device *dev) { #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) u8 *if_ptr; if_ptr = ((u8 *)dev + sizeof(struct pcdp_device)); if (if_ptr[0] == PCDP_IF_PCI) { struct pcdp_if_pci if_pci; /* struct copy since ifptr might not be correctly aligned */ memcpy(&if_pci, if_ptr, sizeof(if_pci)); if (if_pci.trans & PCDP_PCI_TRANS_IOPORT) vga_console_iobase = if_pci.ioport_tra; if (if_pci.trans & PCDP_PCI_TRANS_MMIO) vga_console_membase = if_pci.mmio_tra; } if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) { printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n"); return -ENODEV; } conswitchp = &vga_con; printk(KERN_INFO "PCDP: VGA console\n"); return 0; #else return -ENODEV; #endif }

Contributors

PersonTokensPropCommitsCommitProp
mark maulemark maule8155.86%125.00%
bjorn helgaasbjorn helgaas5739.31%250.00%
christoph hellwigchristoph hellwig74.83%125.00%
Total145100.00%4100.00%


int __init efi_setup_pcdp_console(char *cmdline) { struct pcdp *pcdp; struct pcdp_uart *uart; struct pcdp_device *dev, *end; int i, serial = 0; int rc = -ENODEV; if (efi.hcdp == EFI_INVALID_TABLE_ADDR) return -ENODEV; pcdp = early_ioremap(efi.hcdp, 4096); printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, efi.hcdp); if (strstr(cmdline, "console=hcdp")) { if (pcdp->rev < 3) serial = 1; } else if (strstr(cmdline, "console=")) { printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n"); goto out; } if (pcdp->rev < 3 && efi_uart_console_only()) serial = 1; for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) { if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) { if (uart->type == PCDP_CONSOLE_UART) { rc = setup_serial_console(uart); goto out; } } } end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length); for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts); dev < end; dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) { if (dev->flags & PCDP_PRIMARY_CONSOLE) { if (dev->type == PCDP_CONSOLE_VGA) { rc = setup_vga_console(dev); goto out; } } } out: early_iounmap(pcdp, 4096); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
bjorn helgaasbjorn helgaas26989.67%562.50%
christoph hellwigchristoph hellwig144.67%112.50%
alex williamsonalex williamson134.33%112.50%
greg pearsongreg pearson41.33%112.50%
Total300100.00%8100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
bjorn helgaasbjorn helgaas46272.99%952.94%
mark maulemark maule8413.27%15.88%
christoph hellwigchristoph hellwig507.90%15.88%
yinghai luyinghai lu152.37%15.88%
alex williamsonalex williamson132.05%15.88%
greg pearsongreg pearson40.63%15.88%
peter hurleypeter hurley20.32%15.88%
matthew wilcoxmatthew wilcox20.32%15.88%
alexey starikovskiyalexey starikovskiy10.16%15.88%
Total633100.00%17100.00%
Directory: drivers/firmware
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