109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* Low-level parallel port routines for the Atari builtin port 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Based on parport_amiga.c. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * The built-in Atari parallel port provides one port at a fixed address 91da177e4SLinus Torvalds * with 8 output data lines (D0 - D7), 1 output control line (STROBE) 101da177e4SLinus Torvalds * and 1 input status line (BUSY) able to cause an interrupt. 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/init.h> 151da177e4SLinus Torvalds #include <linux/parport.h> 161da177e4SLinus Torvalds #include <linux/interrupt.h> 171da177e4SLinus Torvalds #include <asm/setup.h> 181da177e4SLinus Torvalds #include <asm/atarihw.h> 191da177e4SLinus Torvalds #include <asm/irq.h> 201da177e4SLinus Torvalds #include <asm/atariints.h> 211da177e4SLinus Torvalds 22df4c756eSCarlos Palminha static struct parport *this_port; 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds static unsigned char 251da177e4SLinus Torvalds parport_atari_read_data(struct parport *p) 261da177e4SLinus Torvalds { 271da177e4SLinus Torvalds unsigned long flags; 281da177e4SLinus Torvalds unsigned char data; 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds local_irq_save(flags); 311da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 15; 321da177e4SLinus Torvalds data = sound_ym.rd_data_reg_sel; 331da177e4SLinus Torvalds local_irq_restore(flags); 341da177e4SLinus Torvalds return data; 351da177e4SLinus Torvalds } 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static void 381da177e4SLinus Torvalds parport_atari_write_data(struct parport *p, unsigned char data) 391da177e4SLinus Torvalds { 401da177e4SLinus Torvalds unsigned long flags; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds local_irq_save(flags); 431da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 15; 441da177e4SLinus Torvalds sound_ym.wd_data = data; 451da177e4SLinus Torvalds local_irq_restore(flags); 461da177e4SLinus Torvalds } 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static unsigned char 491da177e4SLinus Torvalds parport_atari_read_control(struct parport *p) 501da177e4SLinus Torvalds { 511da177e4SLinus Torvalds unsigned long flags; 521da177e4SLinus Torvalds unsigned char control = 0; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds local_irq_save(flags); 551da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 561da177e4SLinus Torvalds if (!(sound_ym.rd_data_reg_sel & (1 << 5))) 571da177e4SLinus Torvalds control = PARPORT_CONTROL_STROBE; 581da177e4SLinus Torvalds local_irq_restore(flags); 591da177e4SLinus Torvalds return control; 601da177e4SLinus Torvalds } 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds static void 631da177e4SLinus Torvalds parport_atari_write_control(struct parport *p, unsigned char control) 641da177e4SLinus Torvalds { 651da177e4SLinus Torvalds unsigned long flags; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds local_irq_save(flags); 681da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 691da177e4SLinus Torvalds if (control & PARPORT_CONTROL_STROBE) 701da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5); 711da177e4SLinus Torvalds else 721da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); 731da177e4SLinus Torvalds local_irq_restore(flags); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static unsigned char 771da177e4SLinus Torvalds parport_atari_frob_control(struct parport *p, unsigned char mask, 781da177e4SLinus Torvalds unsigned char val) 791da177e4SLinus Torvalds { 801da177e4SLinus Torvalds unsigned char old = parport_atari_read_control(p); 811da177e4SLinus Torvalds parport_atari_write_control(p, (old & ~mask) ^ val); 821da177e4SLinus Torvalds return old; 831da177e4SLinus Torvalds } 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds static unsigned char 861da177e4SLinus Torvalds parport_atari_read_status(struct parport *p) 871da177e4SLinus Torvalds { 883d92e8f3SGeert Uytterhoeven return ((st_mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) | 891da177e4SLinus Torvalds PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds static void 931da177e4SLinus Torvalds parport_atari_init_state(struct pardevice *d, struct parport_state *s) 941da177e4SLinus Torvalds { 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static void 981da177e4SLinus Torvalds parport_atari_save_state(struct parport *p, struct parport_state *s) 991da177e4SLinus Torvalds { 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds static void 1031da177e4SLinus Torvalds parport_atari_restore_state(struct parport *p, struct parport_state *s) 1041da177e4SLinus Torvalds { 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static void 1081da177e4SLinus Torvalds parport_atari_enable_irq(struct parport *p) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds enable_irq(IRQ_MFP_BUSY); 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static void 1141da177e4SLinus Torvalds parport_atari_disable_irq(struct parport *p) 1151da177e4SLinus Torvalds { 1161da177e4SLinus Torvalds disable_irq(IRQ_MFP_BUSY); 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds static void 1201da177e4SLinus Torvalds parport_atari_data_forward(struct parport *p) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds unsigned long flags; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds local_irq_save(flags); 1251da177e4SLinus Torvalds /* Soundchip port B as output. */ 1261da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 7; 1271da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40; 1281da177e4SLinus Torvalds local_irq_restore(flags); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static void 1321da177e4SLinus Torvalds parport_atari_data_reverse(struct parport *p) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds static struct parport_operations parport_atari_ops = { 1371da177e4SLinus Torvalds .write_data = parport_atari_write_data, 1381da177e4SLinus Torvalds .read_data = parport_atari_read_data, 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds .write_control = parport_atari_write_control, 1411da177e4SLinus Torvalds .read_control = parport_atari_read_control, 1421da177e4SLinus Torvalds .frob_control = parport_atari_frob_control, 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds .read_status = parport_atari_read_status, 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds .enable_irq = parport_atari_enable_irq, 1471da177e4SLinus Torvalds .disable_irq = parport_atari_disable_irq, 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds .data_forward = parport_atari_data_forward, 1501da177e4SLinus Torvalds .data_reverse = parport_atari_data_reverse, 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds .init_state = parport_atari_init_state, 1531da177e4SLinus Torvalds .save_state = parport_atari_save_state, 1541da177e4SLinus Torvalds .restore_state = parport_atari_restore_state, 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds .epp_write_data = parport_ieee1284_epp_write_data, 1571da177e4SLinus Torvalds .epp_read_data = parport_ieee1284_epp_read_data, 1581da177e4SLinus Torvalds .epp_write_addr = parport_ieee1284_epp_write_addr, 1591da177e4SLinus Torvalds .epp_read_addr = parport_ieee1284_epp_read_addr, 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds .ecp_write_data = parport_ieee1284_ecp_write_data, 1621da177e4SLinus Torvalds .ecp_read_data = parport_ieee1284_ecp_read_data, 1631da177e4SLinus Torvalds .ecp_write_addr = parport_ieee1284_ecp_write_addr, 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds .compat_write_data = parport_ieee1284_write_compat, 1661da177e4SLinus Torvalds .nibble_read_data = parport_ieee1284_read_nibble, 1671da177e4SLinus Torvalds .byte_read_data = parport_ieee1284_read_byte, 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds .owner = THIS_MODULE, 1701da177e4SLinus Torvalds }; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static int __init parport_atari_init(void) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds struct parport *p; 1761da177e4SLinus Torvalds unsigned long flags; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds if (MACH_IS_ATARI) { 1791da177e4SLinus Torvalds local_irq_save(flags); 1801da177e4SLinus Torvalds /* Soundchip port A/B as output. */ 1811da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 7; 1821da177e4SLinus Torvalds sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0; 1831da177e4SLinus Torvalds /* STROBE high. */ 1841da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 1851da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); 1861da177e4SLinus Torvalds local_irq_restore(flags); 1871da177e4SLinus Torvalds /* MFP port I0 as input. */ 1883d92e8f3SGeert Uytterhoeven st_mfp.data_dir &= ~1; 1891da177e4SLinus Torvalds /* MFP port I0 interrupt on high->low edge. */ 1903d92e8f3SGeert Uytterhoeven st_mfp.active_edge &= ~1; 1911da177e4SLinus Torvalds p = parport_register_port((unsigned long)&sound_ym.wd_data, 1921da177e4SLinus Torvalds IRQ_MFP_BUSY, PARPORT_DMA_NONE, 1931da177e4SLinus Torvalds &parport_atari_ops); 1941da177e4SLinus Torvalds if (!p) 1951da177e4SLinus Torvalds return -ENODEV; 1960afafbf3SGeert Uytterhoeven if (request_irq(IRQ_MFP_BUSY, parport_irq_handler, 0, p->name, 1970afafbf3SGeert Uytterhoeven p)) { 1981da177e4SLinus Torvalds parport_put_port (p); 1991da177e4SLinus Torvalds return -ENODEV; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds this_port = p; 2031da177e4SLinus Torvalds printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name); 2041da177e4SLinus Torvalds parport_announce_port (p); 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds return 0; 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds return -ENODEV; 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds static void __exit parport_atari_exit(void) 2121da177e4SLinus Torvalds { 2131da177e4SLinus Torvalds parport_remove_port(this_port); 2141da177e4SLinus Torvalds if (this_port->irq != PARPORT_IRQ_NONE) 2151da177e4SLinus Torvalds free_irq(IRQ_MFP_BUSY, this_port); 2161da177e4SLinus Torvalds parport_put_port(this_port); 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds MODULE_AUTHOR("Andreas Schwab"); 2201da177e4SLinus Torvalds MODULE_DESCRIPTION("Parport Driver for Atari builtin Port"); 2211da177e4SLinus Torvalds MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port"); 2221da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds module_init(parport_atari_init) 2251da177e4SLinus Torvalds module_exit(parport_atari_exit) 226