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130 lines
3.7 KiB
130 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Serial Device Initialisation for Lasi/Asp/Wax/Dino |
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* |
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* (c) Copyright Matthew Wilcox <[email protected]> 2001-2002 |
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*/ |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> |
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#include <linux/module.h> |
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#include <linux/serial_core.h> |
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#include <linux/signal.h> |
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#include <linux/types.h> |
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#include <asm/hardware.h> |
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#include <asm/parisc-device.h> |
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#include <asm/io.h> |
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#include "8250.h" |
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static int __init serial_init_chip(struct parisc_device *dev) |
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{ |
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struct uart_8250_port uart; |
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unsigned long address; |
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int err; |
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#if defined(CONFIG_64BIT) && defined(CONFIG_IOSAPIC) |
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if (!dev->irq && (dev->id.sversion == 0xad)) |
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dev->irq = iosapic_serial_irq(dev); |
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#endif |
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if (!dev->irq) { |
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/* We find some unattached serial ports by walking native |
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* busses. These should be silently ignored. Otherwise, |
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* what we have here is a missing parent device, so tell |
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* the user what they're missing. |
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*/ |
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if (parisc_parent(dev)->id.hw_type != HPHW_IOA) |
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dev_info(&dev->dev, |
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"Serial: device 0x%llx not configured.\n" |
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"Enable support for Wax, Lasi, Asp or Dino.\n", |
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(unsigned long long)dev->hpa.start); |
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return -ENODEV; |
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} |
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address = dev->hpa.start; |
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if (dev->id.sversion != 0x8d) |
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address += 0x800; |
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memset(&uart, 0, sizeof(uart)); |
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uart.port.iotype = UPIO_MEM; |
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/* 7.272727MHz on Lasi. Assumed the same for Dino, Wax and Timi. */ |
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uart.port.uartclk = (dev->id.sversion != 0xad) ? |
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7272727 : 1843200; |
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uart.port.mapbase = address; |
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uart.port.membase = ioremap(address, 16); |
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if (!uart.port.membase) { |
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dev_warn(&dev->dev, "Failed to map memory\n"); |
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return -ENOMEM; |
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} |
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uart.port.irq = dev->irq; |
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uart.port.flags = UPF_BOOT_AUTOCONF; |
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uart.port.dev = &dev->dev; |
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err = serial8250_register_8250_port(&uart); |
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if (err < 0) { |
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dev_warn(&dev->dev, |
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"serial8250_register_8250_port returned error %d\n", |
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err); |
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iounmap(uart.port.membase); |
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return err; |
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} |
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return 0; |
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} |
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static const struct parisc_device_id serial_tbl[] __initconst = { |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 }, |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c }, |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d }, |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad }, |
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{ 0 } |
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}; |
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/* Hack. Some machines have SERIAL_0 attached to Lasi and SERIAL_1 |
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* attached to Dino. Unfortunately, Dino appears before Lasi in the device |
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* tree. To ensure that ttyS0 == SERIAL_0, we register two drivers; one |
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* which only knows about Lasi and then a second which will find all the |
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* other serial ports. HPUX ignores this problem. |
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*/ |
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static const struct parisc_device_id lasi_tbl[] __initconst = { |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */ |
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{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */ |
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{ 0 } |
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}; |
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MODULE_DEVICE_TABLE(parisc, serial_tbl); |
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static struct parisc_driver lasi_driver __refdata = { |
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.name = "serial_1", |
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.id_table = lasi_tbl, |
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.probe = serial_init_chip, |
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}; |
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static struct parisc_driver serial_driver __refdata = { |
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.name = "serial", |
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.id_table = serial_tbl, |
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.probe = serial_init_chip, |
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}; |
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static int __init probe_serial_gsc(void) |
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{ |
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register_parisc_driver(&lasi_driver); |
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register_parisc_driver(&serial_driver); |
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return 0; |
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} |
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module_init(probe_serial_gsc); |
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MODULE_LICENSE("GPL");
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