1 /* 2 * Copyright (c) 2004 M. Warner Losh. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 #include <sys/systm.h> 39 40 #include <machine/bus.h> 41 42 #include <dev/fdc/fdcvar.h> 43 #include <dev/fdc/fdcreg.h> 44 45 #include <isa/isavar.h> 46 #include <isa/isareg.h> 47 48 static int fdc_isa_probe(device_t); 49 static void fdctl_wr_isa(fdc_p, u_int8_t); 50 51 static struct isa_pnp_id fdc_ids[] = { 52 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 53 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 54 {0} 55 }; 56 57 static void 58 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 59 { 60 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 61 } 62 63 static int 64 fdc_isa_probe(device_t dev) 65 { 66 int error, ic_type; 67 struct fdc_data *fdc; 68 69 fdc = device_get_softc(dev); 70 fdc->fdc_dev = dev; 71 fdc->fdctl_wr = fdctl_wr_isa; 72 73 /* Check pnp ids */ 74 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 75 if (error == ENXIO) 76 return ENXIO; 77 if (error == 0) 78 fdc->flags = FDC_ISPNP; 79 80 /* Attempt to allocate our resources for the duration of the probe */ 81 error = fdc_alloc_resources(fdc); 82 if (error) 83 goto out; 84 85 /* Check that the controller is working. */ 86 if ((fdc->flags & FDC_ISPNP) == 0) { 87 error = fdc_initial_reset(fdc); 88 if (error) 89 goto out; 90 } 91 92 /* Try to determine a more specific device type. */ 93 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 94 ic_type = (u_char)ic_type; 95 switch (ic_type) { 96 case 0x80: 97 device_set_desc(dev, "NEC 765 or clone"); 98 fdc->fdct = FDC_NE765; 99 break; 100 case 0x81: /* not mentioned in any hardware doc */ 101 case 0x90: 102 device_set_desc(dev, 103 "Enhanced floppy controller (i82077, NE72065 or clone)"); 104 fdc->fdct = FDC_ENHANCED; 105 break; 106 default: 107 device_set_desc(dev, "Generic floppy controller"); 108 fdc->fdct = FDC_UNKNOWN; 109 break; 110 } 111 } 112 113 out: 114 fdc_release_resources(fdc); 115 return (error); 116 } 117 118 static device_method_t fdc_methods[] = { 119 /* Device interface */ 120 DEVMETHOD(device_probe, fdc_isa_probe), 121 DEVMETHOD(device_attach, fdc_attach), 122 DEVMETHOD(device_detach, fdc_detach), 123 DEVMETHOD(device_shutdown, bus_generic_shutdown), 124 DEVMETHOD(device_suspend, bus_generic_suspend), 125 DEVMETHOD(device_resume, bus_generic_resume), 126 127 /* Bus interface */ 128 DEVMETHOD(bus_print_child, fdc_print_child), 129 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 130 DEVMETHOD(bus_write_ivar, fdc_write_ivar), 131 /* Our children never use any other bus interface methods. */ 132 133 { 0, 0 } 134 }; 135 136 static driver_t fdc_driver = { 137 "fdc", 138 fdc_methods, 139 sizeof(struct fdc_data) 140 }; 141 142 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 143 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 144