1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/drivers/serial/acorn.c 4 * 5 * Copyright (C) 1996-2003 Russell King. 6 */ 7 #include <linux/module.h> 8 #include <linux/types.h> 9 #include <linux/tty.h> 10 #include <linux/serial_core.h> 11 #include <linux/errno.h> 12 #include <linux/ioport.h> 13 #include <linux/slab.h> 14 #include <linux/device.h> 15 #include <linux/init.h> 16 17 #include <asm/io.h> 18 #include <asm/ecard.h> 19 #include <asm/string.h> 20 21 #include "8250.h" 22 23 #define MAX_PORTS 3 24 25 struct serial_card_type { 26 unsigned int num_ports; 27 unsigned int uartclk; 28 unsigned int type; 29 unsigned int offset[MAX_PORTS]; 30 }; 31 32 struct serial_card_info { 33 unsigned int num_ports; 34 int ports[MAX_PORTS]; 35 void __iomem *vaddr; 36 }; 37 38 static int 39 serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) 40 { 41 struct serial_card_info *info; 42 struct serial_card_type *type = id->data; 43 struct uart_8250_port uart; 44 unsigned long bus_addr; 45 unsigned int i; 46 47 info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL); 48 if (!info) 49 return -ENOMEM; 50 51 info->num_ports = type->num_ports; 52 53 bus_addr = ecard_resource_start(ec, type->type); 54 info->vaddr = ecardm_iomap(ec, type->type, 0, 0); 55 if (!info->vaddr) { 56 kfree(info); 57 return -ENOMEM; 58 } 59 60 ecard_set_drvdata(ec, info); 61 62 memset(&uart, 0, sizeof(struct uart_8250_port)); 63 uart.port.irq = ec->irq; 64 uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; 65 uart.port.uartclk = type->uartclk; 66 uart.port.iotype = UPIO_MEM; 67 uart.port.regshift = 2; 68 uart.port.dev = &ec->dev; 69 70 for (i = 0; i < info->num_ports; i++) { 71 uart.port.membase = info->vaddr + type->offset[i]; 72 uart.port.mapbase = bus_addr + type->offset[i]; 73 74 info->ports[i] = serial8250_register_8250_port(&uart); 75 } 76 77 return 0; 78 } 79 80 static void serial_card_remove(struct expansion_card *ec) 81 { 82 struct serial_card_info *info = ecard_get_drvdata(ec); 83 int i; 84 85 ecard_set_drvdata(ec, NULL); 86 87 for (i = 0; i < info->num_ports; i++) 88 if (info->ports[i] > 0) 89 serial8250_unregister_port(info->ports[i]); 90 91 kfree(info); 92 } 93 94 static struct serial_card_type atomwide_type = { 95 .num_ports = 3, 96 .uartclk = 7372800, 97 .type = ECARD_RES_IOCSLOW, 98 .offset = { 0x2800, 0x2400, 0x2000 }, 99 }; 100 101 static struct serial_card_type serport_type = { 102 .num_ports = 2, 103 .uartclk = 3686400, 104 .type = ECARD_RES_IOCSLOW, 105 .offset = { 0x2000, 0x2020 }, 106 }; 107 108 static const struct ecard_id serial_cids[] = { 109 { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type }, 110 { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type }, 111 { 0xffff, 0xffff } 112 }; 113 114 static struct ecard_driver serial_card_driver = { 115 .probe = serial_card_probe, 116 .remove = serial_card_remove, 117 .id_table = serial_cids, 118 .drv = { 119 .name = "8250_acorn", 120 }, 121 }; 122 123 static int __init serial_card_init(void) 124 { 125 return ecard_register_driver(&serial_card_driver); 126 } 127 128 static void __exit serial_card_exit(void) 129 { 130 ecard_remove_driver(&serial_card_driver); 131 } 132 133 MODULE_AUTHOR("Russell King"); 134 MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver"); 135 MODULE_LICENSE("GPL"); 136 137 module_init(serial_card_init); 138 module_exit(serial_card_exit); 139