1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Serial Device Initialisation for Lasi/Asp/Wax/Dino 4 * 5 * (c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002 6 */ 7 8 #include <linux/errno.h> 9 #include <linux/init.h> 10 #include <linux/interrupt.h> 11 #include <linux/ioport.h> 12 #include <linux/module.h> 13 #include <linux/serial_core.h> 14 #include <linux/signal.h> 15 #include <linux/types.h> 16 17 #include <asm/hardware.h> 18 #include <asm/parisc-device.h> 19 #include <asm/io.h> 20 21 #include "8250.h" 22 23 static int __init serial_init_chip(struct parisc_device *dev) 24 { 25 struct uart_8250_port uart; 26 unsigned long address; 27 int err; 28 29 #if defined(CONFIG_64BIT) && defined(CONFIG_IOSAPIC) 30 if (!dev->irq && (dev->id.sversion == 0xad)) 31 dev->irq = iosapic_serial_irq(dev); 32 #endif 33 34 if (!dev->irq) { 35 /* We find some unattached serial ports by walking native 36 * busses. These should be silently ignored. Otherwise, 37 * what we have here is a missing parent device, so tell 38 * the user what they're missing. 39 */ 40 if (parisc_parent(dev)->id.hw_type != HPHW_IOA) 41 dev_info(&dev->dev, 42 "Serial: device 0x%llx not configured.\n" 43 "Enable support for Wax, Lasi, Asp or Dino.\n", 44 (unsigned long long)dev->hpa.start); 45 return -ENODEV; 46 } 47 48 address = dev->hpa.start; 49 if (dev->id.sversion != 0x8d) 50 address += 0x800; 51 52 memset(&uart, 0, sizeof(uart)); 53 uart.port.iotype = UPIO_MEM; 54 /* 7.272727MHz on Lasi. Assumed the same for Dino, Wax and Timi. */ 55 uart.port.uartclk = (dev->id.sversion != 0xad) ? 56 7272727 : 1843200; 57 uart.port.mapbase = address; 58 uart.port.membase = ioremap(address, 16); 59 if (!uart.port.membase) { 60 dev_warn(&dev->dev, "Failed to map memory\n"); 61 return -ENOMEM; 62 } 63 uart.port.irq = dev->irq; 64 uart.port.flags = UPF_BOOT_AUTOCONF; 65 uart.port.dev = &dev->dev; 66 67 err = serial8250_register_8250_port(&uart); 68 if (err < 0) { 69 dev_warn(&dev->dev, 70 "serial8250_register_8250_port returned error %d\n", 71 err); 72 iounmap(uart.port.membase); 73 return err; 74 } 75 76 return 0; 77 } 78 79 static const struct parisc_device_id serial_tbl[] __initconst = { 80 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 }, 81 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c }, 82 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d }, 83 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad }, 84 { 0 } 85 }; 86 87 /* Hack. Some machines have SERIAL_0 attached to Lasi and SERIAL_1 88 * attached to Dino. Unfortunately, Dino appears before Lasi in the device 89 * tree. To ensure that ttyS0 == SERIAL_0, we register two drivers; one 90 * which only knows about Lasi and then a second which will find all the 91 * other serial ports. HPUX ignores this problem. 92 */ 93 static const struct parisc_device_id lasi_tbl[] __initconst = { 94 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */ 95 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */ 96 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */ 97 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */ 98 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */ 99 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */ 100 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */ 101 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */ 102 { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */ 103 { 0 } 104 }; 105 106 107 MODULE_DEVICE_TABLE(parisc, serial_tbl); 108 109 static struct parisc_driver lasi_driver __refdata = { 110 .name = "serial_1", 111 .id_table = lasi_tbl, 112 .probe = serial_init_chip, 113 }; 114 115 static struct parisc_driver serial_driver __refdata = { 116 .name = "serial", 117 .id_table = serial_tbl, 118 .probe = serial_init_chip, 119 }; 120 121 static int __init probe_serial_gsc(void) 122 { 123 register_parisc_driver(&lasi_driver); 124 register_parisc_driver(&serial_driver); 125 return 0; 126 } 127 128 module_init(probe_serial_gsc); 129 130 MODULE_DESCRIPTION("Serial Device Initialisation for Lasi/Asp/Wax/Dino"); 131 MODULE_LICENSE("GPL"); 132