blob: edc675d892016bb29324537561b1c0c8290604de [file] [log] [blame]
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 16bit code to access floppy drives.
2//
Kevin O'Connorc892b132009-08-11 21:59:37 -04003// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05004// Copyright (C) 2002 MandrakeSoft S.A.
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05007
8#include "types.h" // u8
9#include "disk.h" // DISK_RET_SUCCESS
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -040010#include "config.h" // CONFIG_FLOPPY
Kevin O'Connor9521e262008-07-04 13:04:29 -040011#include "biosvar.h" // SET_BDA
Kevin O'Connor10ad7992009-10-24 11:06:08 -040012#include "util.h" // wait_irq
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050013#include "cmos.h" // inb_cmos
Kevin O'Connord21c0892008-11-26 17:02:43 -050014#include "pic.h" // eoi_pic1
Kevin O'Connor9521e262008-07-04 13:04:29 -040015#include "bregs.h" // struct bregs
Kevin O'Connor72eee3e2010-12-27 19:07:49 -050016#include "boot.h" // boot_add_floppy
Kevin O'Connor031ef552010-12-27 19:26:57 -050017#include "pci.h" // pci_to_bdf
18#include "pci_ids.h" // PCI_CLASS_BRIDGE_ISA
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050019
Kevin O'Connor7b184d82009-08-23 11:56:55 -040020#define FLOPPY_SIZE_CODE 0x02 // 512 byte sectors
21#define FLOPPY_DATALEN 0xff // Not used - because size code is 0x02
22#define FLOPPY_MOTOR_TICKS 37 // ~2 seconds
23#define FLOPPY_FILLBYTE 0xf6
24#define FLOPPY_GAPLEN 0x1B
25#define FLOPPY_FORMAT_GAPLEN 0x6c
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050026
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050027// New diskette parameter table adding 3 parameters from IBM
28// Since no provisions are made for multiple drive types, most
29// values in this table are ignored. I set parameters for 1.44M
30// floppy here
Kevin O'Connor372e0712009-09-09 09:51:31 -040031struct floppy_ext_dbt_s diskette_param_table2 VAR16VISIBLE = {
Kevin O'Connor44c631d2008-03-02 11:24:36 -050032 .dbt = {
Kevin O'Connor7b184d82009-08-23 11:56:55 -040033 .specify1 = 0xAF, // step rate 12ms, head unload 240ms
34 .specify2 = 0x02, // head load time 4ms, DMA used
35 .shutoff_ticks = FLOPPY_MOTOR_TICKS, // ~2 seconds
36 .bps_code = FLOPPY_SIZE_CODE,
Kevin O'Connor44c631d2008-03-02 11:24:36 -050037 .sectors = 18,
Kevin O'Connor7b184d82009-08-23 11:56:55 -040038 .interblock_len = FLOPPY_GAPLEN,
39 .data_len = FLOPPY_DATALEN,
40 .gap_len = FLOPPY_FORMAT_GAPLEN,
41 .fill_byte = FLOPPY_FILLBYTE,
42 .settle_time = 0x0F, // 15ms
43 .startup_time = 0x08, // 1 second
Kevin O'Connor44c631d2008-03-02 11:24:36 -050044 },
45 .max_track = 79, // maximum track
46 .data_rate = 0, // data transfer rate
47 .drive_type = 4, // drive type in cmos
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050048};
49
Kevin O'Connor30853762009-01-17 18:49:20 -050050// Since no provisions are made for multiple drive types, most
51// values in this table are ignored. I set parameters for 1.44M
52// floppy here
53struct floppy_dbt_s diskette_param_table VAR16FIXED(0xefc7) = {
54 .specify1 = 0xAF,
Kevin O'Connor7b184d82009-08-23 11:56:55 -040055 .specify2 = 0x02,
56 .shutoff_ticks = FLOPPY_MOTOR_TICKS,
57 .bps_code = FLOPPY_SIZE_CODE,
Kevin O'Connor30853762009-01-17 18:49:20 -050058 .sectors = 18,
Kevin O'Connor7b184d82009-08-23 11:56:55 -040059 .interblock_len = FLOPPY_GAPLEN,
60 .data_len = FLOPPY_DATALEN,
61 .gap_len = FLOPPY_FORMAT_GAPLEN,
62 .fill_byte = FLOPPY_FILLBYTE,
Kevin O'Connor30853762009-01-17 18:49:20 -050063 .settle_time = 0x0F,
64 .startup_time = 0x08,
65};
66
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -040067struct floppyinfo_s {
68 struct chs_s chs;
69 u8 config_data;
70 u8 media_state;
71};
72
Kevin O'Connor372e0712009-09-09 09:51:31 -040073struct floppyinfo_s FloppyInfo[] VAR16VISIBLE = {
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -040074 // Unknown
75 { {0, 0, 0}, 0x00, 0x00},
76 // 1 - 360KB, 5.25" - 2 heads, 40 tracks, 9 sectors
77 { {2, 40, 9}, 0x00, 0x25},
78 // 2 - 1.2MB, 5.25" - 2 heads, 80 tracks, 15 sectors
79 { {2, 80, 15}, 0x00, 0x25},
80 // 3 - 720KB, 3.5" - 2 heads, 80 tracks, 9 sectors
81 { {2, 80, 9}, 0x00, 0x17},
82 // 4 - 1.44MB, 3.5" - 2 heads, 80 tracks, 18 sectors
83 { {2, 80, 18}, 0x00, 0x17},
84 // 5 - 2.88MB, 3.5" - 2 heads, 80 tracks, 36 sectors
85 { {2, 80, 36}, 0xCC, 0xD7},
86 // 6 - 160k, 5.25" - 1 heads, 40 tracks, 8 sectors
87 { {1, 40, 8}, 0x00, 0x27},
88 // 7 - 180k, 5.25" - 1 heads, 40 tracks, 9 sectors
89 { {1, 40, 9}, 0x00, 0x27},
90 // 8 - 320k, 5.25" - 2 heads, 40 tracks, 8 sectors
91 { {2, 40, 8}, 0x00, 0x27},
92};
93
Kevin O'Connor77d227b2009-10-22 21:48:39 -040094struct drive_s *
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -050095init_floppy(int floppyid, int ftype)
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -040096{
97 if (ftype <= 0 || ftype >= ARRAY_SIZE(FloppyInfo)) {
98 dprintf(1, "Bad floppy type %d\n", ftype);
Kevin O'Connor77d227b2009-10-22 21:48:39 -040099 return NULL;
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400100 }
101
Kevin O'Connord7e998f2010-02-15 22:48:28 -0500102 struct drive_s *drive_g = malloc_fseg(sizeof(*drive_g));
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500103 if (!drive_g) {
Kevin O'Connord7e998f2010-02-15 22:48:28 -0500104 warn_noalloc();
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400105 return NULL;
Kevin O'Connord7e998f2010-02-15 22:48:28 -0500106 }
107 memset(drive_g, 0, sizeof(*drive_g));
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400108 drive_g->cntl_id = floppyid;
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500109 drive_g->type = DTYPE_FLOPPY;
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400110 drive_g->blksize = DISK_SECTOR_SIZE;
111 drive_g->floppy_type = ftype;
112 drive_g->sectors = (u64)-1;
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400113
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400114 memcpy(&drive_g->lchs, &FloppyInfo[ftype].chs
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400115 , sizeof(FloppyInfo[ftype].chs));
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500116 return drive_g;
117}
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400118
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500119static void
120addFloppy(int floppyid, int ftype)
121{
122 struct drive_s *drive_g = init_floppy(floppyid, ftype);
123 if (!drive_g)
124 return;
125 char *desc = znprintf(MAXDESCSIZE, "Floppy [drive %c]", 'A' + floppyid);
Kevin O'Connor031ef552010-12-27 19:26:57 -0500126 int bdf = pci_find_class(PCI_CLASS_BRIDGE_ISA); /* isa-to-pci bridge */
127 int prio = bootprio_find_fdc_device(bdf, PORT_FD_BASE, floppyid);
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500128 boot_add_floppy(drive_g, desc, prio);
Kevin O'Connor51fd0a12009-09-12 13:20:14 -0400129}
130
131void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500132floppy_setup(void)
Kevin O'Connor3bbcc142008-04-13 17:07:33 -0400133{
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400134 if (! CONFIG_FLOPPY)
Kevin O'Connorf54c1502008-06-14 15:56:16 -0400135 return;
Kevin O'Connor35192dd2008-06-08 19:18:33 -0400136 dprintf(3, "init floppy drives\n");
Kevin O'Connor88c00ee2008-05-18 00:14:13 -0400137
Kevin O'Connor7661f2f2009-02-07 01:21:00 -0500138 if (CONFIG_COREBOOT) {
139 // XXX - disable floppies on coreboot for now.
140 } else {
141 u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400142 if (type & 0xf0)
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500143 addFloppy(0, type >> 4);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400144 if (type & 0x0f)
Kevin O'Connorca2bc1c2010-12-29 21:41:19 -0500145 addFloppy(1, type & 0x0f);
Kevin O'Connor88c00ee2008-05-18 00:14:13 -0400146 }
Kevin O'Connor88c00ee2008-05-18 00:14:13 -0400147
Kevin O'Connor3bbcc142008-04-13 17:07:33 -0400148 outb(0x02, PORT_DMA1_MASK_REG);
Kevin O'Connorf54c1502008-06-14 15:56:16 -0400149
Kevin O'Connorcc9e1bf2010-07-28 21:31:38 -0400150 enable_hwirq(6, FUNC16(entry_0e));
Kevin O'Connor3bbcc142008-04-13 17:07:33 -0400151}
152
Kevin O'Connora3855ad2009-08-16 21:59:40 -0400153// Find a floppy type that matches a given image size.
154int
155find_floppy_type(u32 size)
156{
157 int i;
158 for (i=1; i<ARRAY_SIZE(FloppyInfo); i++) {
159 struct chs_s *c = &FloppyInfo[i].chs;
Kevin O'Connor36c93a52009-09-12 19:35:04 -0400160 if (c->cylinders * c->heads * c->spt * DISK_SECTOR_SIZE == size)
Kevin O'Connora3855ad2009-08-16 21:59:40 -0400161 return i;
162 }
163 return -1;
164}
165
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500166
167/****************************************************************
168 * Low-level floppy IO
169 ****************************************************************/
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500170
171static void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500172floppy_reset_controller(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500173{
174 // Reset controller
175 u8 val8 = inb(PORT_FD_DOR);
176 outb(val8 & ~0x04, PORT_FD_DOR);
177 outb(val8 | 0x04, PORT_FD_DOR);
178
179 // Wait for controller to come out of reset
180 while ((inb(PORT_FD_STATUS) & 0xc0) != 0x80)
181 ;
182}
183
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500184static int
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500185wait_floppy_irq(void)
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500186{
Kevin O'Connor10ad7992009-10-24 11:06:08 -0400187 ASSERT16();
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500188 u8 v;
189 for (;;) {
Kevin O'Connor10ad7992009-10-24 11:06:08 -0400190 if (!GET_BDA(floppy_motor_counter))
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500191 return -1;
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500192 v = GET_BDA(floppy_recalibration_status);
193 if (v & FRS_TIMEOUT)
194 break;
Kevin O'Connor7a98fd02010-01-17 13:00:49 -0500195 // Could use wait_irq() here, but that causes issues on
196 // bochs, so use yield() instead.
197 yield();
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500198 }
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500199
200 v &= ~FRS_TIMEOUT;
201 SET_BDA(floppy_recalibration_status, v);
202 return 0;
203}
204
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500205static void
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400206floppy_prepare_controller(u8 floppyid)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500207{
208 CLEARBITS_BDA(floppy_recalibration_status, FRS_TIMEOUT);
209
210 // turn on motor of selected drive, DMA & int enabled, normal operation
211 u8 prev_reset = inb(PORT_FD_DOR) & 0x04;
212 u8 dor = 0x10;
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400213 if (floppyid)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500214 dor = 0x20;
215 dor |= 0x0c;
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400216 dor |= floppyid;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500217 outb(dor, PORT_FD_DOR);
218
219 // reset the disk motor timeout value of INT 08
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400220 SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500221
222 // wait for drive readiness
223 while ((inb(PORT_FD_STATUS) & 0xc0) != 0x80)
224 ;
225
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500226 if (!prev_reset)
227 wait_floppy_irq();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500228}
229
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400230static int
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500231floppy_pio(u8 *cmd, u8 cmdlen)
232{
233 floppy_prepare_controller(cmd[1] & 1);
234
235 // send command to controller
236 u8 i;
237 for (i=0; i<cmdlen; i++)
238 outb(cmd[i], PORT_FD_DATA);
239
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500240 int ret = wait_floppy_irq();
241 if (ret) {
242 floppy_reset_controller();
243 return -1;
Kevin O'Connor06ad44e2008-04-05 19:30:02 -0400244 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500245
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500246 return 0;
247}
248
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400249static int
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400250floppy_cmd(struct disk_op_s *op, u16 count, u8 *cmd, u8 cmdlen)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500251{
252 // es:bx = pointer to where to place information from diskette
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400253 u32 addr = (u32)op->buf_fl;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500254
255 // check for 64K boundary overrun
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400256 u16 end = count - 1;
257 u32 last_addr = addr + end;
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400258 if ((addr >> 16) != (last_addr >> 16))
259 return DISK_RET_EBOUNDARY;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500260
261 u8 mode_register = 0x4a; // single mode, increment, autoinit disable,
262 if (cmd[0] == 0xe6)
263 // read
264 mode_register = 0x46;
265
Kevin O'Connor44c631d2008-03-02 11:24:36 -0500266 //DEBUGF("floppy dma c2\n");
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500267 outb(0x06, PORT_DMA1_MASK_REG);
268 outb(0x00, PORT_DMA1_CLEAR_FF_REG); // clear flip-flop
Kevin O'Connore10d3452008-07-09 22:45:12 -0400269 outb(addr, PORT_DMA_ADDR_2);
270 outb(addr>>8, PORT_DMA_ADDR_2);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500271 outb(0x00, PORT_DMA1_CLEAR_FF_REG); // clear flip-flop
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400272 outb(end, PORT_DMA_CNT_2);
273 outb(end>>8, PORT_DMA_CNT_2);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500274
275 // port 0b: DMA-1 Mode Register
276 // transfer type=write, channel 2
277 outb(mode_register, PORT_DMA1_MODE_REG);
278
279 // port 81: DMA-1 Page Register, channel 2
Kevin O'Connore10d3452008-07-09 22:45:12 -0400280 outb(addr>>16, PORT_DMA_PAGE_2);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500281
282 outb(0x02, PORT_DMA1_MASK_REG); // unmask channel 2
283
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400284 int ret = floppy_pio(cmd, cmdlen);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400285 if (ret)
286 return DISK_RET_ETIMEOUT;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500287
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500288 // check port 3f4 for accessibility to status bytes
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400289 if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0)
290 return DISK_RET_ECONTROLLER;
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500291
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500292 // read 7 return status bytes from controller
293 u8 i;
294 for (i=0; i<7; i++) {
295 u8 v = inb(PORT_FD_DATA);
296 cmd[i] = v;
297 SET_BDA(floppy_return_status[i], v);
298 }
299
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400300 return DISK_RET_SUCCESS;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500301}
302
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500303
304/****************************************************************
305 * Floppy media sense
306 ****************************************************************/
307
308static inline void
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400309set_diskette_current_cyl(u8 floppyid, u8 cyl)
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500310{
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400311 SET_BDA(floppy_track[floppyid], cyl);
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500312}
313
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500314static void
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400315floppy_drive_recal(u8 floppyid)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500316{
317 // send Recalibrate command (2 bytes) to controller
318 u8 data[12];
319 data[0] = 0x07; // 07: Recalibrate
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400320 data[1] = floppyid; // 0=drive0, 1=drive1
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500321 floppy_pio(data, 2);
322
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400323 SETBITS_BDA(floppy_recalibration_status, 1<<floppyid);
324 set_diskette_current_cyl(floppyid, 0);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500325}
326
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500327static int
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400328floppy_media_sense(struct drive_s *drive_g)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500329{
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500330 // for now cheat and get drive type from CMOS,
331 // assume media is same as drive type
332
333 // ** config_data **
334 // Bitfields for diskette media control:
335 // Bit(s) Description (Table M0028)
336 // 7-6 last data rate set by controller
337 // 00=500kbps, 01=300kbps, 10=250kbps, 11=1Mbps
338 // 5-4 last diskette drive step rate selected
339 // 00=0Ch, 01=0Dh, 10=0Eh, 11=0Ah
340 // 3-2 {data rate at start of operation}
341 // 1-0 reserved
342
343 // ** media_state **
344 // Bitfields for diskette drive media state:
345 // Bit(s) Description (Table M0030)
346 // 7-6 data rate
347 // 00=500kbps, 01=300kbps, 10=250kbps, 11=1Mbps
348 // 5 double stepping required (e.g. 360kB in 1.2MB)
349 // 4 media type established
350 // 3 drive capable of supporting 4MB media
351 // 2-0 on exit from BIOS, contains
352 // 000 trying 360kB in 360kB
353 // 001 trying 360kB in 1.2MB
354 // 010 trying 1.2MB in 1.2MB
355 // 011 360kB in 360kB established
356 // 100 360kB in 1.2MB established
357 // 101 1.2MB in 1.2MB established
358 // 110 reserved
359 // 111 all other formats/drives
360
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400361 u8 ftype = GET_GLOBAL(drive_g->floppy_type);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400362 SET_BDA(floppy_last_data_rate, GET_GLOBAL(FloppyInfo[ftype].config_data));
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400363 u8 floppyid = GET_GLOBAL(drive_g->cntl_id);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400364 SET_BDA(floppy_media_state[floppyid]
365 , GET_GLOBAL(FloppyInfo[ftype].media_state));
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400366 return DISK_RET_SUCCESS;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500367}
368
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400369static int
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400370check_recal_drive(struct drive_s *drive_g)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500371{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400372 u8 floppyid = GET_GLOBAL(drive_g->cntl_id);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400373 if ((GET_BDA(floppy_recalibration_status) & (1<<floppyid))
374 && (GET_BDA(floppy_media_state[floppyid]) & FMS_MEDIA_DRIVE_ESTABLISHED))
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500375 // Media is known.
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400376 return DISK_RET_SUCCESS;
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500377
378 // Recalibrate drive.
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400379 floppy_drive_recal(floppyid);
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500380
381 // Sense media.
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400382 return floppy_media_sense(drive_g);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500383}
384
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500385
386/****************************************************************
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400387 * Floppy handlers
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500388 ****************************************************************/
389
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500390static void
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400391lba2chs(struct disk_op_s *op, u8 *track, u8 *sector, u8 *head)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500392{
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400393 u32 lba = op->lba;
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400394
395 u32 tmp = lba + 1;
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400396 u16 nlspt = GET_GLOBAL(op->drive_g->lchs.spt);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400397 *sector = tmp % nlspt;
398
399 tmp /= nlspt;
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400400 u16 nlh = GET_GLOBAL(op->drive_g->lchs.heads);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400401 *head = tmp % nlh;
402
403 tmp /= nlh;
404 *track = tmp;
405}
406
407// diskette controller reset
408static int
409floppy_reset(struct disk_op_s *op)
410{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400411 u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400412 set_diskette_current_cyl(floppyid, 0); // current cylinder
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400413 return DISK_RET_SUCCESS;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500414}
415
416// Read Diskette Sectors
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400417static int
418floppy_read(struct disk_op_s *op)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500419{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400420 int res = check_recal_drive(op->drive_g);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400421 if (res)
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400422 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500423
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400424 u8 track, sector, head;
425 lba2chs(op, &track, &sector, &head);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500426
427 // send read-normal-data command (9 bytes) to controller
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400428 u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500429 u8 data[12];
430 data[0] = 0xe6; // e6: read normal data
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400431 data[1] = (head << 2) | floppyid; // HD DR1 DR2
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500432 data[2] = track;
433 data[3] = head;
434 data[4] = sector;
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400435 data[5] = FLOPPY_SIZE_CODE;
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400436 data[6] = sector + op->count - 1; // last sector to read on track
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400437 data[7] = FLOPPY_GAPLEN;
438 data[8] = FLOPPY_DATALEN;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500439
Kevin O'Connor36c93a52009-09-12 19:35:04 -0400440 res = floppy_cmd(op, op->count * DISK_SECTOR_SIZE, data, 9);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400441 if (res)
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400442 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500443
444 if (data[0] & 0xc0) {
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400445 res = DISK_RET_ECONTROLLER;
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400446 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500447 }
448
449 // ??? should track be new val from return_status[3] ?
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400450 set_diskette_current_cyl(floppyid, track);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400451 return DISK_RET_SUCCESS;
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400452fail:
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400453 op->count = 0; // no sectors read
454 return res;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500455}
456
457// Write Diskette Sectors
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400458static int
459floppy_write(struct disk_op_s *op)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500460{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400461 int res = check_recal_drive(op->drive_g);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400462 if (res)
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400463 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500464
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400465 u8 track, sector, head;
466 lba2chs(op, &track, &sector, &head);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500467
468 // send write-normal-data command (9 bytes) to controller
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400469 u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500470 u8 data[12];
471 data[0] = 0xc5; // c5: write normal data
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400472 data[1] = (head << 2) | floppyid; // HD DR1 DR2
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500473 data[2] = track;
474 data[3] = head;
475 data[4] = sector;
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400476 data[5] = FLOPPY_SIZE_CODE;
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400477 data[6] = sector + op->count - 1; // last sector to write on track
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400478 data[7] = FLOPPY_GAPLEN;
479 data[8] = FLOPPY_DATALEN;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500480
Kevin O'Connor36c93a52009-09-12 19:35:04 -0400481 res = floppy_cmd(op, op->count * DISK_SECTOR_SIZE, data, 9);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400482 if (res)
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400483 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500484
485 if (data[0] & 0xc0) {
Kevin O'Connor7661f2f2009-02-07 01:21:00 -0500486 if (data[1] & 0x02)
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400487 res = DISK_RET_EWRITEPROTECT;
Kevin O'Connor7661f2f2009-02-07 01:21:00 -0500488 else
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400489 res = DISK_RET_ECONTROLLER;
Kevin O'Connor7661f2f2009-02-07 01:21:00 -0500490 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500491 }
492
493 // ??? should track be new val from return_status[3] ?
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400494 set_diskette_current_cyl(floppyid, track);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400495 return DISK_RET_SUCCESS;
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400496fail:
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400497 op->count = 0; // no sectors read
498 return res;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500499}
500
501// Verify Diskette Sectors
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400502static int
503floppy_verify(struct disk_op_s *op)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500504{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400505 int res = check_recal_drive(op->drive_g);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400506 if (res)
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400507 goto fail;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500508
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400509 u8 track, sector, head;
510 lba2chs(op, &track, &sector, &head);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500511
512 // ??? should track be new val from return_status[3] ?
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400513 u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400514 set_diskette_current_cyl(floppyid, track);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400515 return DISK_RET_SUCCESS;
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400516fail:
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400517 op->count = 0; // no sectors read
518 return res;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500519}
520
521// format diskette track
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400522static int
523floppy_format(struct disk_op_s *op)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500524{
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400525 int ret = check_recal_drive(op->drive_g);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400526 if (ret)
527 return ret;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500528
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400529 u8 head = op->lba;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500530
531 // send format-track command (6 bytes) to controller
Kevin O'Connor77d227b2009-10-22 21:48:39 -0400532 u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500533 u8 data[12];
534 data[0] = 0x4d; // 4d: format track
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400535 data[1] = (head << 2) | floppyid; // HD DR1 DR2
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400536 data[2] = FLOPPY_SIZE_CODE;
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400537 data[3] = op->count; // number of sectors per track
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400538 data[4] = FLOPPY_FORMAT_GAPLEN;
539 data[5] = FLOPPY_FILLBYTE;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500540
Kevin O'Connor7b184d82009-08-23 11:56:55 -0400541 ret = floppy_cmd(op, op->count * 4, data, 6);
Kevin O'Connora68aeaf2008-07-07 21:37:10 -0400542 if (ret)
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400543 return ret;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500544
545 if (data[0] & 0xc0) {
Kevin O'Connor7661f2f2009-02-07 01:21:00 -0500546 if (data[1] & 0x02)
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400547 return DISK_RET_EWRITEPROTECT;
548 return DISK_RET_ECONTROLLER;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500549 }
550
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400551 set_diskette_current_cyl(floppyid, 0);
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400552 return DISK_RET_SUCCESS;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500553}
554
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400555int
556process_floppy_op(struct disk_op_s *op)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500557{
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400558 if (!CONFIG_FLOPPY)
559 return 0;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500560
Kevin O'Connoraf5aabb2009-08-16 18:48:38 -0400561 switch (op->command) {
562 case CMD_RESET:
563 return floppy_reset(op);
564 case CMD_READ:
565 return floppy_read(op);
566 case CMD_WRITE:
567 return floppy_write(op);
568 case CMD_VERIFY:
569 return floppy_verify(op);
570 case CMD_FORMAT:
571 return floppy_format(op);
572 default:
573 op->count = 0;
574 return DISK_RET_EPARAM;
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500575 }
576}
577
Kevin O'Connora3b612e2009-02-07 11:25:29 -0500578
579/****************************************************************
580 * HW irqs
581 ****************************************************************/
582
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500583// INT 0Eh Diskette Hardware ISR Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500584void VISIBLE16
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500585handle_0e(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500586{
Kevin O'Connor15c1f222008-06-12 22:59:43 -0400587 debug_isr(DEBUG_ISR_0e);
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400588 if (! CONFIG_FLOPPY)
Kevin O'Connor40967022008-07-21 22:23:05 -0400589 goto done;
590
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500591 if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0) {
592 outb(0x08, PORT_FD_DATA); // sense interrupt status
593 while ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0)
594 ;
595 do {
596 inb(PORT_FD_DATA);
597 } while ((inb(PORT_FD_STATUS) & 0xc0) == 0xc0);
598 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500599 // diskette interrupt has occurred
600 SETBITS_BDA(floppy_recalibration_status, FRS_TIMEOUT);
Kevin O'Connor40967022008-07-21 22:23:05 -0400601
602done:
603 eoi_pic1();
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500604}
605
606// Called from int08 handler.
607void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500608floppy_tick(void)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500609{
Kevin O'Connor0a0e42e2009-08-16 12:09:44 -0400610 if (! CONFIG_FLOPPY)
Kevin O'Connor40967022008-07-21 22:23:05 -0400611 return;
612
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500613 // time to turn off drive(s)?
614 u8 fcount = GET_BDA(floppy_motor_counter);
615 if (fcount) {
616 fcount--;
617 SET_BDA(floppy_motor_counter, fcount);
618 if (fcount == 0)
619 // turn motor(s) off
620 outb(inb(PORT_FD_DOR) & 0xcf, PORT_FD_DOR);
621 }
622}