11da177e4SLinus Torvalds /* Low-level parallel port routines for the Atari builtin port 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Based on parport_amiga.c. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * The built-in Atari parallel port provides one port at a fixed address 81da177e4SLinus Torvalds * with 8 output data lines (D0 - D7), 1 output control line (STROBE) 91da177e4SLinus Torvalds * and 1 input status line (BUSY) able to cause an interrupt. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/module.h> 131da177e4SLinus Torvalds #include <linux/init.h> 141da177e4SLinus Torvalds #include <linux/parport.h> 151da177e4SLinus Torvalds #include <linux/interrupt.h> 161da177e4SLinus Torvalds #include <asm/setup.h> 171da177e4SLinus Torvalds #include <asm/atarihw.h> 181da177e4SLinus Torvalds #include <asm/irq.h> 191da177e4SLinus Torvalds #include <asm/atariints.h> 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds static struct parport *this_port = NULL; 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds static unsigned char 241da177e4SLinus Torvalds parport_atari_read_data(struct parport *p) 251da177e4SLinus Torvalds { 261da177e4SLinus Torvalds unsigned long flags; 271da177e4SLinus Torvalds unsigned char data; 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds local_irq_save(flags); 301da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 15; 311da177e4SLinus Torvalds data = sound_ym.rd_data_reg_sel; 321da177e4SLinus Torvalds local_irq_restore(flags); 331da177e4SLinus Torvalds return data; 341da177e4SLinus Torvalds } 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds static void 371da177e4SLinus Torvalds parport_atari_write_data(struct parport *p, unsigned char data) 381da177e4SLinus Torvalds { 391da177e4SLinus Torvalds unsigned long flags; 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds local_irq_save(flags); 421da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 15; 431da177e4SLinus Torvalds sound_ym.wd_data = data; 441da177e4SLinus Torvalds local_irq_restore(flags); 451da177e4SLinus Torvalds } 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds static unsigned char 481da177e4SLinus Torvalds parport_atari_read_control(struct parport *p) 491da177e4SLinus Torvalds { 501da177e4SLinus Torvalds unsigned long flags; 511da177e4SLinus Torvalds unsigned char control = 0; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds local_irq_save(flags); 541da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 551da177e4SLinus Torvalds if (!(sound_ym.rd_data_reg_sel & (1 << 5))) 561da177e4SLinus Torvalds control = PARPORT_CONTROL_STROBE; 571da177e4SLinus Torvalds local_irq_restore(flags); 581da177e4SLinus Torvalds return control; 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds static void 621da177e4SLinus Torvalds parport_atari_write_control(struct parport *p, unsigned char control) 631da177e4SLinus Torvalds { 641da177e4SLinus Torvalds unsigned long flags; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds local_irq_save(flags); 671da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 681da177e4SLinus Torvalds if (control & PARPORT_CONTROL_STROBE) 691da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5); 701da177e4SLinus Torvalds else 711da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); 721da177e4SLinus Torvalds local_irq_restore(flags); 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds static unsigned char 761da177e4SLinus Torvalds parport_atari_frob_control(struct parport *p, unsigned char mask, 771da177e4SLinus Torvalds unsigned char val) 781da177e4SLinus Torvalds { 791da177e4SLinus Torvalds unsigned char old = parport_atari_read_control(p); 801da177e4SLinus Torvalds parport_atari_write_control(p, (old & ~mask) ^ val); 811da177e4SLinus Torvalds return old; 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds static unsigned char 851da177e4SLinus Torvalds parport_atari_read_status(struct parport *p) 861da177e4SLinus Torvalds { 873d92e8f3SGeert Uytterhoeven return ((st_mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) | 881da177e4SLinus Torvalds PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR); 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds static void 921da177e4SLinus Torvalds parport_atari_init_state(struct pardevice *d, struct parport_state *s) 931da177e4SLinus Torvalds { 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds static void 971da177e4SLinus Torvalds parport_atari_save_state(struct parport *p, struct parport_state *s) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static void 1021da177e4SLinus Torvalds parport_atari_restore_state(struct parport *p, struct parport_state *s) 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static void 1071da177e4SLinus Torvalds parport_atari_enable_irq(struct parport *p) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds enable_irq(IRQ_MFP_BUSY); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds static void 1131da177e4SLinus Torvalds parport_atari_disable_irq(struct parport *p) 1141da177e4SLinus Torvalds { 1151da177e4SLinus Torvalds disable_irq(IRQ_MFP_BUSY); 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static void 1191da177e4SLinus Torvalds parport_atari_data_forward(struct parport *p) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds unsigned long flags; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds local_irq_save(flags); 1241da177e4SLinus Torvalds /* Soundchip port B as output. */ 1251da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 7; 1261da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40; 1271da177e4SLinus Torvalds local_irq_restore(flags); 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds static void 1311da177e4SLinus Torvalds parport_atari_data_reverse(struct parport *p) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static struct parport_operations parport_atari_ops = { 1361da177e4SLinus Torvalds .write_data = parport_atari_write_data, 1371da177e4SLinus Torvalds .read_data = parport_atari_read_data, 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds .write_control = parport_atari_write_control, 1401da177e4SLinus Torvalds .read_control = parport_atari_read_control, 1411da177e4SLinus Torvalds .frob_control = parport_atari_frob_control, 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds .read_status = parport_atari_read_status, 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds .enable_irq = parport_atari_enable_irq, 1461da177e4SLinus Torvalds .disable_irq = parport_atari_disable_irq, 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds .data_forward = parport_atari_data_forward, 1491da177e4SLinus Torvalds .data_reverse = parport_atari_data_reverse, 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds .init_state = parport_atari_init_state, 1521da177e4SLinus Torvalds .save_state = parport_atari_save_state, 1531da177e4SLinus Torvalds .restore_state = parport_atari_restore_state, 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds .epp_write_data = parport_ieee1284_epp_write_data, 1561da177e4SLinus Torvalds .epp_read_data = parport_ieee1284_epp_read_data, 1571da177e4SLinus Torvalds .epp_write_addr = parport_ieee1284_epp_write_addr, 1581da177e4SLinus Torvalds .epp_read_addr = parport_ieee1284_epp_read_addr, 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds .ecp_write_data = parport_ieee1284_ecp_write_data, 1611da177e4SLinus Torvalds .ecp_read_data = parport_ieee1284_ecp_read_data, 1621da177e4SLinus Torvalds .ecp_write_addr = parport_ieee1284_ecp_write_addr, 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds .compat_write_data = parport_ieee1284_write_compat, 1651da177e4SLinus Torvalds .nibble_read_data = parport_ieee1284_read_nibble, 1661da177e4SLinus Torvalds .byte_read_data = parport_ieee1284_read_byte, 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds .owner = THIS_MODULE, 1691da177e4SLinus Torvalds }; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds static int __init parport_atari_init(void) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct parport *p; 1751da177e4SLinus Torvalds unsigned long flags; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds if (MACH_IS_ATARI) { 1781da177e4SLinus Torvalds local_irq_save(flags); 1791da177e4SLinus Torvalds /* Soundchip port A/B as output. */ 1801da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 7; 1811da177e4SLinus Torvalds sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0; 1821da177e4SLinus Torvalds /* STROBE high. */ 1831da177e4SLinus Torvalds sound_ym.rd_data_reg_sel = 14; 1841da177e4SLinus Torvalds sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); 1851da177e4SLinus Torvalds local_irq_restore(flags); 1861da177e4SLinus Torvalds /* MFP port I0 as input. */ 1873d92e8f3SGeert Uytterhoeven st_mfp.data_dir &= ~1; 1881da177e4SLinus Torvalds /* MFP port I0 interrupt on high->low edge. */ 1893d92e8f3SGeert Uytterhoeven st_mfp.active_edge &= ~1; 1901da177e4SLinus Torvalds p = parport_register_port((unsigned long)&sound_ym.wd_data, 1911da177e4SLinus Torvalds IRQ_MFP_BUSY, PARPORT_DMA_NONE, 1921da177e4SLinus Torvalds &parport_atari_ops); 1931da177e4SLinus Torvalds if (!p) 1941da177e4SLinus Torvalds return -ENODEV; 1950afafbf3SGeert Uytterhoeven if (request_irq(IRQ_MFP_BUSY, parport_irq_handler, 0, p->name, 1960afafbf3SGeert Uytterhoeven p)) { 1971da177e4SLinus Torvalds parport_put_port (p); 1981da177e4SLinus Torvalds return -ENODEV; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds this_port = p; 2021da177e4SLinus Torvalds printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name); 2031da177e4SLinus Torvalds parport_announce_port (p); 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds return 0; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds return -ENODEV; 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds static void __exit parport_atari_exit(void) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds parport_remove_port(this_port); 2131da177e4SLinus Torvalds if (this_port->irq != PARPORT_IRQ_NONE) 2141da177e4SLinus Torvalds free_irq(IRQ_MFP_BUSY, this_port); 2151da177e4SLinus Torvalds parport_put_port(this_port); 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds MODULE_AUTHOR("Andreas Schwab"); 2191da177e4SLinus Torvalds MODULE_DESCRIPTION("Parport Driver for Atari builtin Port"); 2201da177e4SLinus Torvalds MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port"); 2211da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds module_init(parport_atari_init) 2241da177e4SLinus Torvalds module_exit(parport_atari_exit) 225