^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Parse the EFI PCDP table to locate the console device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (c) Copyright 2002, 2003, 2004 Hewlett-Packard Development Company, L.P.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Khalid Aziz <khalid.aziz@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Alex Williamson <alex.williamson@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Bjorn Helgaas <bjorn.helgaas@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/serial.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/serial_core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/vga.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "pcdp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) setup_serial_console(struct pcdp_uart *uart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #ifdef CONFIG_SERIAL_8250_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int mmio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static char options[64], *p = options;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) char parity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) mmio = (uart->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) p += sprintf(p, "uart8250,%s,0x%llx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) mmio ? "mmio" : "io", uart->addr.address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (uart->baud) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) p += sprintf(p, ",%llu", uart->baud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (uart->bits) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) switch (uart->parity) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) case 0x2: parity = 'e'; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) case 0x3: parity = 'o'; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) default: parity = 'n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) p += sprintf(p, "%c%d", parity, uart->bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) add_preferred_console("uart", 8250, &options[9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return setup_earlycon(options);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) setup_vga_console(struct pcdp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u8 *if_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (if_ptr[0] == PCDP_IF_PCI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct pcdp_if_pci if_pci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* struct copy since ifptr might not be correctly aligned */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) memcpy(&if_pci, if_ptr, sizeof(if_pci));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) vga_console_iobase = if_pci.ioport_tra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) vga_console_membase = if_pci.mmio_tra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) conswitchp = &vga_con;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) printk(KERN_INFO "PCDP: VGA console\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) extern unsigned long hcdp_phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) efi_setup_pcdp_console(char *cmdline)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct pcdp *pcdp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct pcdp_uart *uart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct pcdp_device *dev, *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int i, serial = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (hcdp_phys == EFI_INVALID_TABLE_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) pcdp = early_memremap(hcdp_phys, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, hcdp_phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (strstr(cmdline, "console=hcdp")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (pcdp->rev < 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) serial = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } else if (strstr(cmdline, "console=")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (pcdp->rev < 3 && efi_uart_console_only())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) serial = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (uart->type == PCDP_CONSOLE_UART) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) rc = setup_serial_console(uart);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev < end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (dev->flags & PCDP_PRIMARY_CONSOLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (dev->type == PCDP_CONSOLE_VGA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) rc = setup_vga_console(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) early_memunmap(pcdp, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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