Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1 | /* |
| 2 | comedi/drivers/pcmmio.c |
| 3 | Driver for Winsystems PC-104 based multifunction IO board. |
| 4 | |
| 5 | COMEDI - Linux Control and Measurement Device Interface |
| 6 | Copyright (C) 2007 Calin A. Culianu <calin@ajvar.org> |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | /* |
| 23 | Driver: pcmmio |
| 24 | Description: A driver for the PCM-MIO multifunction board |
| 25 | Devices: [Winsystems] PCM-MIO (pcmmio) |
| 26 | Author: Calin Culianu <calin@ajvar.org> |
| 27 | Updated: Wed, May 16 2007 16:21:10 -0500 |
| 28 | Status: works |
| 29 | |
| 30 | A driver for the relatively new PCM-MIO multifunction board from |
| 31 | Winsystems. This board is a PC-104 based I/O board. It contains |
| 32 | four subdevices: |
| 33 | subdevice 0 - 16 channels of 16-bit AI |
| 34 | subdevice 1 - 8 channels of 16-bit AO |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 35 | subdevice 2 - first 24 channels of the 48 channel of DIO |
| 36 | (with edge-triggered interrupt support) |
| 37 | subdevice 3 - last 24 channels of the 48 channel DIO |
| 38 | (no interrupt support for this bank of channels) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 39 | |
| 40 | Some notes: |
| 41 | |
| 42 | Synchronous reads and writes are the only things implemented for AI and AO, |
| 43 | even though the hardware itself can do streaming acquisition, etc. Anyone |
| 44 | want to add asynchronous I/O for AI/AO as a feature? Be my guest... |
| 45 | |
| 46 | Asynchronous I/O for the DIO subdevices *is* implemented, however! They are |
| 47 | basically edge-triggered interrupts for any configuration of the first |
| 48 | 24 DIO-lines. |
| 49 | |
| 50 | Also note that this interrupt support is untested. |
| 51 | |
| 52 | A few words about edge-detection IRQ support (commands on DIO): |
| 53 | |
| 54 | * To use edge-detection IRQ support for the DIO subdevice, pass the IRQ |
| 55 | of the board to the comedi_config command. The board IRQ is not jumpered |
| 56 | but rather configured through software, so any IRQ from 1-15 is OK. |
| 57 | |
| 58 | * Due to the genericity of the comedi API, you need to create a special |
| 59 | comedi_command in order to use edge-triggered interrupts for DIO. |
| 60 | |
| 61 | * Use comedi_commands with TRIG_NOW. Your callback will be called each |
| 62 | time an edge is detected on the specified DIO line(s), and the data |
| 63 | values will be two sample_t's, which should be concatenated to form |
| 64 | one 32-bit unsigned int. This value is the mask of channels that had |
| 65 | edges detected from your channel list. Note that the bits positions |
| 66 | in the mask correspond to positions in your chanlist when you |
| 67 | specified the command and *not* channel id's! |
| 68 | |
| 69 | * To set the polarity of the edge-detection interrupts pass a nonzero value |
| 70 | for either CR_RANGE or CR_AREF for edge-up polarity, or a zero |
| 71 | value for both CR_RANGE and CR_AREF if you want edge-down polarity. |
| 72 | |
| 73 | Configuration Options: |
| 74 | [0] - I/O port base address |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 75 | [1] - IRQ (optional -- for edge-detect interrupt support only, |
| 76 | leave out if you don't need this feature) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 77 | */ |
| 78 | |
Greg Kroah-Hartman | 25436dc | 2009-04-27 15:14:34 -0700 | [diff] [blame] | 79 | #include <linux/interrupt.h> |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 80 | #include "../comedidev.h" |
Bill Pemberton | 0b8f754 | 2009-05-14 15:24:29 -0400 | [diff] [blame] | 81 | #include "pcm_common.h" |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 82 | #include <linux/pci.h> /* for PCI devices */ |
| 83 | |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 84 | /* This stuff is all from pcmuio.c -- it refers to the DIO subdevices only */ |
| 85 | #define CHANS_PER_PORT 8 |
| 86 | #define PORTS_PER_ASIC 6 |
| 87 | #define INTR_PORTS_PER_ASIC 3 |
| 88 | #define MAX_CHANS_PER_SUBDEV 24 /* number of channels per comedi subdevice */ |
| 89 | #define PORTS_PER_SUBDEV (MAX_CHANS_PER_SUBDEV/CHANS_PER_PORT) |
| 90 | #define CHANS_PER_ASIC (CHANS_PER_PORT*PORTS_PER_ASIC) |
| 91 | #define INTR_CHANS_PER_ASIC 24 |
| 92 | #define INTR_PORTS_PER_SUBDEV (INTR_CHANS_PER_ASIC/CHANS_PER_PORT) |
| 93 | #define MAX_DIO_CHANS (PORTS_PER_ASIC*1*CHANS_PER_PORT) |
| 94 | #define MAX_ASICS (MAX_DIO_CHANS/CHANS_PER_ASIC) |
| 95 | #define SDEV_NO ((int)(s - dev->subdevices)) |
| 96 | #define CALC_N_DIO_SUBDEVS(nchans) ((nchans)/MAX_CHANS_PER_SUBDEV + (!!((nchans)%MAX_CHANS_PER_SUBDEV)) /*+ (nchans > INTR_CHANS_PER_ASIC ? 2 : 1)*/) |
| 97 | /* IO Memory sizes */ |
| 98 | #define ASIC_IOSIZE (0x0B) |
| 99 | #define PCMMIO48_IOSIZE ASIC_IOSIZE |
| 100 | |
| 101 | /* Some offsets - these are all in the 16byte IO memory offset from |
| 102 | the base address. Note that there is a paging scheme to swap out |
| 103 | offsets 0x8-0xA using the PAGELOCK register. See the table below. |
| 104 | |
| 105 | Register(s) Pages R/W? Description |
| 106 | -------------------------------------------------------------- |
| 107 | REG_PORTx All R/W Read/Write/Configure IO |
| 108 | REG_INT_PENDING All ReadOnly Quickly see which INT_IDx has int. |
| 109 | REG_PAGELOCK All WriteOnly Select a page |
| 110 | REG_POLx Pg. 1 only WriteOnly Select edge-detection polarity |
| 111 | REG_ENABx Pg. 2 only WriteOnly Enable/Disable edge-detect. int. |
| 112 | REG_INT_IDx Pg. 3 only R/W See which ports/bits have ints. |
| 113 | */ |
| 114 | #define REG_PORT0 0x0 |
| 115 | #define REG_PORT1 0x1 |
| 116 | #define REG_PORT2 0x2 |
| 117 | #define REG_PORT3 0x3 |
| 118 | #define REG_PORT4 0x4 |
| 119 | #define REG_PORT5 0x5 |
| 120 | #define REG_INT_PENDING 0x6 |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 121 | #define REG_PAGELOCK 0x7 /* |
| 122 | * page selector register, upper 2 bits select |
| 123 | * a page and bits 0-5 are used to 'lock down' |
| 124 | * a particular port above to make it readonly. |
| 125 | */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 126 | #define REG_POL0 0x8 |
| 127 | #define REG_POL1 0x9 |
| 128 | #define REG_POL2 0xA |
| 129 | #define REG_ENAB0 0x8 |
| 130 | #define REG_ENAB1 0x9 |
| 131 | #define REG_ENAB2 0xA |
| 132 | #define REG_INT_ID0 0x8 |
| 133 | #define REG_INT_ID1 0x9 |
| 134 | #define REG_INT_ID2 0xA |
| 135 | |
| 136 | #define NUM_PAGED_REGS 3 |
| 137 | #define NUM_PAGES 4 |
| 138 | #define FIRST_PAGED_REG 0x8 |
| 139 | #define REG_PAGE_BITOFFSET 6 |
| 140 | #define REG_LOCK_BITOFFSET 0 |
| 141 | #define REG_PAGE_MASK (~((0x1<<REG_PAGE_BITOFFSET)-1)) |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 142 | #define REG_LOCK_MASK (~(REG_PAGE_MASK)) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 143 | #define PAGE_POL 1 |
| 144 | #define PAGE_ENAB 2 |
| 145 | #define PAGE_INT_ID 3 |
| 146 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 147 | typedef int (*comedi_insn_fn_t) (struct comedi_device *, |
| 148 | struct comedi_subdevice *, |
| 149 | struct comedi_insn *, unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 150 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 151 | static int ai_rinsn(struct comedi_device *, struct comedi_subdevice *, |
| 152 | struct comedi_insn *, unsigned int *); |
| 153 | static int ao_rinsn(struct comedi_device *, struct comedi_subdevice *, |
| 154 | struct comedi_insn *, unsigned int *); |
| 155 | static int ao_winsn(struct comedi_device *, struct comedi_subdevice *, |
| 156 | struct comedi_insn *, unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 157 | |
| 158 | /* |
| 159 | * Board descriptions for two imaginary boards. Describing the |
| 160 | * boards in this way is optional, and completely driver-dependent. |
| 161 | * Some drivers use arrays such as this, other do not. |
| 162 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 163 | struct pcmmio_board { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 164 | const char *name; |
| 165 | const int dio_num_asics; |
| 166 | const int dio_num_ports; |
| 167 | const int total_iosize; |
| 168 | const int ai_bits; |
| 169 | const int ao_bits; |
| 170 | const int n_ai_chans; |
| 171 | const int n_ao_chans; |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 172 | const struct comedi_lrange *ai_range_table, *ao_range_table; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 173 | comedi_insn_fn_t ai_rinsn, ao_rinsn, ao_winsn; |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 174 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 175 | |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 176 | static const struct comedi_lrange ranges_ai = { |
| 177 | 4, {RANGE(-5., 5.), RANGE(-10., 10.), RANGE(0., 5.), RANGE(0., 10.)} |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 178 | }; |
| 179 | |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 180 | static const struct comedi_lrange ranges_ao = { |
| 181 | 6, {RANGE(0., 5.), RANGE(0., 10.), RANGE(-5., 5.), RANGE(-10., 10.), |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 182 | RANGE(-2.5, 2.5), RANGE(-2.5, 7.5)} |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 183 | }; |
| 184 | |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 185 | static const struct pcmmio_board pcmmio_boards[] = { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 186 | { |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 187 | .name = "pcmmio", |
| 188 | .dio_num_asics = 1, |
| 189 | .dio_num_ports = 6, |
| 190 | .total_iosize = 32, |
| 191 | .ai_bits = 16, |
| 192 | .ao_bits = 16, |
| 193 | .n_ai_chans = 16, |
| 194 | .n_ao_chans = 8, |
| 195 | .ai_range_table = &ranges_ai, |
| 196 | .ao_range_table = &ranges_ao, |
| 197 | .ai_rinsn = ai_rinsn, |
| 198 | .ao_rinsn = ao_rinsn, |
| 199 | .ao_winsn = ao_winsn}, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 200 | }; |
| 201 | |
| 202 | /* |
| 203 | * Useful for shorthand access to the particular board structure |
| 204 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 205 | #define thisboard ((const struct pcmmio_board *)dev->board_ptr) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 206 | |
| 207 | /* this structure is for data unique to this subdevice. */ |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 208 | struct pcmmio_subdev_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 209 | |
| 210 | union { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 211 | /* for DIO: mapping of halfwords (bytes) |
| 212 | in port/chanarray to iobase */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 213 | unsigned long iobases[PORTS_PER_SUBDEV]; |
| 214 | |
| 215 | /* for AI/AO */ |
| 216 | unsigned long iobase; |
| 217 | }; |
| 218 | union { |
| 219 | struct { |
| 220 | |
| 221 | /* The below is only used for intr subdevices */ |
| 222 | struct { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 223 | /* |
| 224 | * if non-negative, this subdev has an |
| 225 | * interrupt asic |
| 226 | */ |
| 227 | int asic; |
| 228 | /* |
| 229 | * if nonnegative, the first channel id for |
| 230 | * interrupts. |
| 231 | */ |
| 232 | int first_chan; |
| 233 | /* |
| 234 | * the number of asic channels in this subdev |
| 235 | * that have interrutps |
| 236 | */ |
| 237 | int num_asic_chans; |
| 238 | /* |
| 239 | * if nonnegative, the first channel id with |
| 240 | * respect to the asic that has interrupts |
| 241 | */ |
| 242 | int asic_chan; |
| 243 | /* |
| 244 | * subdev-relative channel mask for channels |
| 245 | * we are interested in |
| 246 | */ |
| 247 | int enabled_mask; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 248 | int active; |
| 249 | int stop_count; |
| 250 | int continuous; |
| 251 | spinlock_t spinlock; |
| 252 | } intr; |
| 253 | } dio; |
| 254 | struct { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 255 | /* the last unsigned int data written */ |
| 256 | unsigned int shadow_samples[8]; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 257 | } ao; |
| 258 | }; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 259 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 260 | |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 261 | /* |
| 262 | * this structure is for data unique to this hardware driver. If |
| 263 | * several hardware drivers keep similar information in this structure, |
| 264 | * feel free to suggest moving the variable to the struct comedi_device struct. |
| 265 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 266 | struct pcmmio_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 267 | /* stuff for DIO */ |
| 268 | struct { |
| 269 | unsigned char pagelock; /* current page and lock */ |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 270 | /* shadow of POLx registers */ |
| 271 | unsigned char pol[NUM_PAGED_REGS]; |
| 272 | /* shadow of ENABx registers */ |
| 273 | unsigned char enab[NUM_PAGED_REGS]; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 274 | int num; |
| 275 | unsigned long iobase; |
| 276 | unsigned int irq; |
| 277 | spinlock_t spinlock; |
| 278 | } asics[MAX_ASICS]; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 279 | struct pcmmio_subdev_private *sprivs; |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 280 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 281 | |
| 282 | /* |
| 283 | * most drivers define the following macro to make it easy to |
| 284 | * access the private structure. |
| 285 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 286 | #define devpriv ((struct pcmmio_private *)dev->private) |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 287 | #define subpriv ((struct pcmmio_subdev_private *)s->private) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 288 | /* |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 289 | * The struct comedi_driver structure tells the Comedi core module |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 290 | * which functions to call to configure/deconfigure (attach/detach) |
| 291 | * the board, and also about the kernel module that contains |
| 292 | * the device code. |
| 293 | */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 294 | static int pcmmio_attach(struct comedi_device *dev, |
| 295 | struct comedi_devconfig *it); |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 296 | static int pcmmio_detach(struct comedi_device *dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 297 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 298 | static struct comedi_driver driver = { |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 299 | .driver_name = "pcmmio", |
| 300 | .module = THIS_MODULE, |
| 301 | .attach = pcmmio_attach, |
| 302 | .detach = pcmmio_detach, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 303 | /* It is not necessary to implement the following members if you are |
| 304 | * writing a driver for a ISA PnP or PCI card */ |
| 305 | /* Most drivers will support multiple types of boards by |
| 306 | * having an array of board structures. These were defined |
| 307 | * in pcmmio_boards[] above. Note that the element 'name' |
| 308 | * was first in the structure -- Comedi uses this fact to |
| 309 | * extract the name of the board without knowing any details |
| 310 | * about the structure except for its length. |
| 311 | * When a device is attached (by comedi_config), the name |
| 312 | * of the device is given to Comedi, and Comedi tries to |
| 313 | * match it by going through the list of board names. If |
| 314 | * there is a match, the address of the pointer is put |
| 315 | * into dev->board_ptr and driver->attach() is called. |
| 316 | * |
| 317 | * Note that these are not necessary if you can determine |
| 318 | * the type of board in software. ISA PnP, PCI, and PCMCIA |
| 319 | * devices are such boards. |
| 320 | */ |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 321 | .board_name = &pcmmio_boards[0].name, |
| 322 | .offset = sizeof(struct pcmmio_board), |
Bill Pemberton | 8629efa | 2009-04-23 15:54:56 -0400 | [diff] [blame] | 323 | .num_names = ARRAY_SIZE(pcmmio_boards), |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 324 | }; |
| 325 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 326 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, |
| 327 | struct comedi_subdevice *s, |
| 328 | struct comedi_insn *insn, unsigned int *data); |
| 329 | static int pcmmio_dio_insn_config(struct comedi_device *dev, |
| 330 | struct comedi_subdevice *s, |
| 331 | struct comedi_insn *insn, unsigned int *data); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 332 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 333 | static irqreturn_t interrupt_pcmmio(int irq, void *d); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 334 | static void pcmmio_stop_intr(struct comedi_device *, struct comedi_subdevice *); |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 335 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s); |
| 336 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s); |
| 337 | static int pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 338 | struct comedi_cmd *cmd); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 339 | |
| 340 | /* some helper functions to deal with specifics of this device's registers */ |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 341 | /* sets up/clears ASIC chips to defaults */ |
| 342 | static void init_asics(struct comedi_device *dev); |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 343 | static void switch_page(struct comedi_device *dev, int asic, int page); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 344 | #ifdef notused |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 345 | static void lock_port(struct comedi_device *dev, int asic, int port); |
| 346 | static void unlock_port(struct comedi_device *dev, int asic, int port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 347 | #endif |
| 348 | |
| 349 | /* |
| 350 | * Attach is called by the Comedi core to configure the driver |
| 351 | * for a particular board. If you specified a board_name array |
| 352 | * in the driver structure, dev->board_ptr contains that |
| 353 | * address. |
| 354 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 355 | static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 356 | { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 357 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 358 | int sdev_no, chans_left, n_dio_subdevs, n_subdevs, port, asic, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 359 | thisasic_chanct = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 360 | unsigned long iobase; |
| 361 | unsigned int irq[MAX_ASICS]; |
| 362 | |
| 363 | iobase = it->options[0]; |
| 364 | irq[0] = it->options[1]; |
| 365 | |
| 366 | printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 367 | iobase); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 368 | |
| 369 | dev->iobase = iobase; |
| 370 | |
| 371 | if (!iobase || !request_region(iobase, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 372 | thisboard->total_iosize, |
| 373 | driver.driver_name)) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 374 | printk("I/O port conflict\n"); |
| 375 | return -EIO; |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Initialize dev->board_name. Note that we can use the "thisboard" |
| 380 | * macro now, since we just initialized it in the last line. |
| 381 | */ |
| 382 | dev->board_name = thisboard->name; |
| 383 | |
| 384 | /* |
| 385 | * Allocate the private structure area. alloc_private() is a |
| 386 | * convenient macro defined in comedidev.h. |
| 387 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 388 | if (alloc_private(dev, sizeof(struct pcmmio_private)) < 0) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 389 | printk("cannot allocate private data structure\n"); |
| 390 | return -ENOMEM; |
| 391 | } |
| 392 | |
| 393 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 394 | devpriv->asics[asic].num = asic; |
| 395 | devpriv->asics[asic].iobase = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 396 | dev->iobase + 16 + asic * ASIC_IOSIZE; |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 397 | /* |
| 398 | * this gets actually set at the end of this function when we |
| 399 | * request_irqs |
| 400 | */ |
| 401 | devpriv->asics[asic].irq = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 402 | spin_lock_init(&devpriv->asics[asic].spinlock); |
| 403 | } |
| 404 | |
| 405 | chans_left = CHANS_PER_ASIC * thisboard->dio_num_asics; |
| 406 | n_dio_subdevs = CALC_N_DIO_SUBDEVS(chans_left); |
| 407 | n_subdevs = n_dio_subdevs + 2; |
| 408 | devpriv->sprivs = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 409 | kcalloc(n_subdevs, sizeof(struct pcmmio_subdev_private), |
| 410 | GFP_KERNEL); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 411 | if (!devpriv->sprivs) { |
| 412 | printk("cannot allocate subdevice private data structures\n"); |
| 413 | return -ENOMEM; |
| 414 | } |
| 415 | /* |
| 416 | * Allocate the subdevice structures. alloc_subdevice() is a |
| 417 | * convenient macro defined in comedidev.h. |
| 418 | * |
| 419 | * Allocate 1 AI + 1 AO + 2 DIO subdevs (24 lines per DIO) |
| 420 | */ |
| 421 | if (alloc_subdevices(dev, n_subdevs) < 0) { |
| 422 | printk("cannot allocate subdevice data structures\n"); |
| 423 | return -ENOMEM; |
| 424 | } |
| 425 | |
| 426 | /* First, AI */ |
| 427 | sdev_no = 0; |
| 428 | s = dev->subdevices + sdev_no; |
| 429 | s->private = devpriv->sprivs + sdev_no; |
| 430 | s->maxdata = (1 << thisboard->ai_bits) - 1; |
| 431 | s->range_table = thisboard->ai_range_table; |
| 432 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; |
| 433 | s->type = COMEDI_SUBD_AI; |
| 434 | s->n_chan = thisboard->n_ai_chans; |
| 435 | s->len_chanlist = s->n_chan; |
| 436 | s->insn_read = thisboard->ai_rinsn; |
| 437 | subpriv->iobase = dev->iobase + 0; |
| 438 | /* initialize the resource enable register by clearing it */ |
| 439 | outb(0, subpriv->iobase + 3); |
| 440 | outb(0, subpriv->iobase + 4 + 3); |
| 441 | |
| 442 | /* Next, AO */ |
| 443 | ++sdev_no; |
| 444 | s = dev->subdevices + sdev_no; |
| 445 | s->private = devpriv->sprivs + sdev_no; |
| 446 | s->maxdata = (1 << thisboard->ao_bits) - 1; |
| 447 | s->range_table = thisboard->ao_range_table; |
| 448 | s->subdev_flags = SDF_READABLE; |
| 449 | s->type = COMEDI_SUBD_AO; |
| 450 | s->n_chan = thisboard->n_ao_chans; |
| 451 | s->len_chanlist = s->n_chan; |
| 452 | s->insn_read = thisboard->ao_rinsn; |
| 453 | s->insn_write = thisboard->ao_winsn; |
| 454 | subpriv->iobase = dev->iobase + 8; |
| 455 | /* initialize the resource enable register by clearing it */ |
| 456 | outb(0, subpriv->iobase + 3); |
| 457 | outb(0, subpriv->iobase + 4 + 3); |
| 458 | |
| 459 | ++sdev_no; |
| 460 | port = 0; |
| 461 | asic = 0; |
| 462 | for (; sdev_no < (int)dev->n_subdevices; ++sdev_no) { |
| 463 | int byte_no; |
| 464 | |
| 465 | s = dev->subdevices + sdev_no; |
| 466 | s->private = devpriv->sprivs + sdev_no; |
| 467 | s->maxdata = 1; |
| 468 | s->range_table = &range_digital; |
| 469 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
| 470 | s->type = COMEDI_SUBD_DIO; |
| 471 | s->insn_bits = pcmmio_dio_insn_bits; |
| 472 | s->insn_config = pcmmio_dio_insn_config; |
Bill Pemberton | 214e7b5 | 2009-05-14 15:24:28 -0400 | [diff] [blame] | 473 | s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 474 | subpriv->dio.intr.asic = -1; |
| 475 | subpriv->dio.intr.first_chan = -1; |
| 476 | subpriv->dio.intr.asic_chan = -1; |
| 477 | subpriv->dio.intr.num_asic_chans = -1; |
| 478 | subpriv->dio.intr.active = 0; |
| 479 | s->len_chanlist = 1; |
| 480 | |
| 481 | /* save the ioport address for each 'port' of 8 channels in the |
| 482 | subdevice */ |
| 483 | for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) { |
| 484 | if (port >= PORTS_PER_ASIC) { |
| 485 | port = 0; |
| 486 | ++asic; |
| 487 | thisasic_chanct = 0; |
| 488 | } |
| 489 | subpriv->iobases[byte_no] = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 490 | devpriv->asics[asic].iobase + port; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 491 | |
| 492 | if (thisasic_chanct < |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 493 | CHANS_PER_PORT * INTR_PORTS_PER_ASIC |
| 494 | && subpriv->dio.intr.asic < 0) { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 495 | /* |
| 496 | * this is an interrupt subdevice, |
| 497 | * so setup the struct |
| 498 | */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 499 | subpriv->dio.intr.asic = asic; |
| 500 | subpriv->dio.intr.active = 0; |
| 501 | subpriv->dio.intr.stop_count = 0; |
| 502 | subpriv->dio.intr.first_chan = byte_no * 8; |
| 503 | subpriv->dio.intr.asic_chan = thisasic_chanct; |
| 504 | subpriv->dio.intr.num_asic_chans = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 505 | s->n_chan - subpriv->dio.intr.first_chan; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 506 | s->cancel = pcmmio_cancel; |
| 507 | s->do_cmd = pcmmio_cmd; |
| 508 | s->do_cmdtest = pcmmio_cmdtest; |
| 509 | s->len_chanlist = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 510 | subpriv->dio.intr.num_asic_chans; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 511 | } |
| 512 | thisasic_chanct += CHANS_PER_PORT; |
| 513 | } |
| 514 | spin_lock_init(&subpriv->dio.intr.spinlock); |
| 515 | |
| 516 | chans_left -= s->n_chan; |
| 517 | |
| 518 | if (!chans_left) { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 519 | /* |
| 520 | * reset the asic to our first asic, |
| 521 | * to do intr subdevs |
| 522 | */ |
| 523 | asic = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 524 | port = 0; |
| 525 | } |
| 526 | |
| 527 | } |
| 528 | |
| 529 | init_asics(dev); /* clear out all the registers, basically */ |
| 530 | |
| 531 | for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) { |
| 532 | if (irq[asic] |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 533 | && request_irq(irq[asic], interrupt_pcmmio, |
| 534 | IRQF_SHARED, thisboard->name, dev)) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 535 | int i; |
| 536 | /* unroll the allocated irqs.. */ |
| 537 | for (i = asic - 1; i >= 0; --i) { |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 538 | free_irq(irq[i], dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 539 | devpriv->asics[i].irq = irq[i] = 0; |
| 540 | } |
| 541 | irq[asic] = 0; |
| 542 | } |
| 543 | devpriv->asics[asic].irq = irq[asic]; |
| 544 | } |
| 545 | |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 546 | dev->irq = irq[0]; /* |
| 547 | * grr.. wish comedi dev struct supported |
| 548 | * multiple irqs.. |
| 549 | */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 550 | |
| 551 | if (irq[0]) { |
| 552 | printk("irq: %u ", irq[0]); |
| 553 | if (irq[1] && thisboard->dio_num_asics == 2) |
| 554 | printk("second ASIC irq: %u ", irq[1]); |
| 555 | } else { |
| 556 | printk("(IRQ mode disabled) "); |
| 557 | } |
| 558 | |
| 559 | printk("attached\n"); |
| 560 | |
| 561 | return 1; |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | * _detach is called to deconfigure a device. It should deallocate |
| 566 | * resources. |
| 567 | * This function is also called when _attach() fails, so it should be |
| 568 | * careful not to release resources that were not necessarily |
| 569 | * allocated by _attach(). dev->private and dev->subdevices are |
| 570 | * deallocated automatically by the core. |
| 571 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 572 | static int pcmmio_detach(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 573 | { |
| 574 | int i; |
| 575 | |
| 576 | printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name); |
| 577 | if (dev->iobase) |
| 578 | release_region(dev->iobase, thisboard->total_iosize); |
| 579 | |
| 580 | for (i = 0; i < MAX_ASICS; ++i) { |
| 581 | if (devpriv && devpriv->asics[i].irq) |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 582 | free_irq(devpriv->asics[i].irq, dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | if (devpriv && devpriv->sprivs) |
| 586 | kfree(devpriv->sprivs); |
| 587 | |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | /* DIO devices are slightly special. Although it is possible to |
| 592 | * implement the insn_read/insn_write interface, it is much more |
| 593 | * useful to applications if you implement the insn_bits interface. |
| 594 | * This allows packed reading/writing of the DIO channels. The |
| 595 | * comedi core can convert between insn_bits and insn_read/write */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 596 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, |
| 597 | struct comedi_subdevice *s, |
| 598 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 599 | { |
| 600 | int byte_no; |
| 601 | if (insn->n != 2) |
| 602 | return -EINVAL; |
| 603 | |
| 604 | /* NOTE: |
| 605 | reading a 0 means this channel was high |
| 606 | writine a 0 sets the channel high |
| 607 | reading a 1 means this channel was low |
| 608 | writing a 1 means set this channel low |
| 609 | |
| 610 | Therefore everything is always inverted. */ |
| 611 | |
| 612 | /* The insn data is a mask in data[0] and the new data |
| 613 | * in data[1], each channel cooresponding to a bit. */ |
| 614 | |
| 615 | #ifdef DAMMIT_ITS_BROKEN |
| 616 | /* DEBUG */ |
| 617 | printk("write mask: %08x data: %08x\n", data[0], data[1]); |
| 618 | #endif |
| 619 | |
| 620 | s->state = 0; |
| 621 | |
| 622 | for (byte_no = 0; byte_no < s->n_chan / CHANS_PER_PORT; ++byte_no) { |
| 623 | /* address of 8-bit port */ |
| 624 | unsigned long ioaddr = subpriv->iobases[byte_no], |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 625 | /* bit offset of port in 32-bit doubleword */ |
| 626 | offset = byte_no * 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 627 | /* this 8-bit port's data */ |
| 628 | unsigned char byte = 0, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 629 | /* The write mask for this port (if any) */ |
| 630 | write_mask_byte = (data[0] >> offset) & 0xff, |
| 631 | /* The data byte for this port */ |
| 632 | data_byte = (data[1] >> offset) & 0xff; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 633 | |
| 634 | byte = inb(ioaddr); /* read all 8-bits for this port */ |
| 635 | |
| 636 | #ifdef DAMMIT_ITS_BROKEN |
| 637 | /* DEBUG */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 638 | printk |
| 639 | ("byte %d wmb %02x db %02x offset %02d io %04x, data_in %02x ", |
| 640 | byte_no, (unsigned)write_mask_byte, (unsigned)data_byte, |
| 641 | offset, ioaddr, (unsigned)byte); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 642 | #endif |
| 643 | |
| 644 | if (write_mask_byte) { |
Daniel Patrick Johnson | d2d0895 | 2009-10-14 02:04:23 +0000 | [diff] [blame^] | 645 | /* |
| 646 | * this byte has some write_bits |
| 647 | * -- so set the output lines |
| 648 | */ |
| 649 | /* clear bits for write mask */ |
| 650 | byte &= ~write_mask_byte; |
| 651 | /* set to inverted data_byte */ |
| 652 | byte |= ~data_byte & write_mask_byte; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 653 | /* Write out the new digital output state */ |
| 654 | outb(byte, ioaddr); |
| 655 | } |
| 656 | #ifdef DAMMIT_ITS_BROKEN |
| 657 | /* DEBUG */ |
| 658 | printk("data_out_byte %02x\n", (unsigned)byte); |
| 659 | #endif |
| 660 | /* save the digital input lines for this byte.. */ |
| 661 | s->state |= ((unsigned int)byte) << offset; |
| 662 | } |
| 663 | |
| 664 | /* now return the DIO lines to data[1] - note they came inverted! */ |
| 665 | data[1] = ~s->state; |
| 666 | |
| 667 | #ifdef DAMMIT_ITS_BROKEN |
| 668 | /* DEBUG */ |
| 669 | printk("s->state %08x data_out %08x\n", s->state, data[1]); |
| 670 | #endif |
| 671 | |
| 672 | return 2; |
| 673 | } |
| 674 | |
| 675 | /* The input or output configuration of each digital line is |
| 676 | * configured by a special insn_config instruction. chanspec |
| 677 | * contains the channel to be changed, and data[0] contains the |
| 678 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 679 | static int pcmmio_dio_insn_config(struct comedi_device *dev, |
| 680 | struct comedi_subdevice *s, |
| 681 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 682 | { |
| 683 | int chan = CR_CHAN(insn->chanspec), byte_no = chan / 8, bit_no = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 684 | chan % 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 685 | unsigned long ioaddr; |
| 686 | unsigned char byte; |
| 687 | |
| 688 | /* Compute ioaddr for this channel */ |
| 689 | ioaddr = subpriv->iobases[byte_no]; |
| 690 | |
| 691 | /* NOTE: |
| 692 | writing a 0 an IO channel's bit sets the channel to INPUT |
| 693 | and pulls the line high as well |
| 694 | |
| 695 | writing a 1 to an IO channel's bit pulls the line low |
| 696 | |
| 697 | All channels are implicitly always in OUTPUT mode -- but when |
| 698 | they are high they can be considered to be in INPUT mode.. |
| 699 | |
| 700 | Thus, we only force channels low if the config request was INPUT, |
| 701 | otherwise we do nothing to the hardware. */ |
| 702 | |
| 703 | switch (data[0]) { |
| 704 | case INSN_CONFIG_DIO_OUTPUT: |
| 705 | /* save to io_bits -- don't actually do anything since |
| 706 | all input channels are also output channels... */ |
| 707 | s->io_bits |= 1 << chan; |
| 708 | break; |
| 709 | case INSN_CONFIG_DIO_INPUT: |
| 710 | /* write a 0 to the actual register representing the channel |
| 711 | to set it to 'input'. 0 means "float high". */ |
| 712 | byte = inb(ioaddr); |
| 713 | byte &= ~(1 << bit_no); |
| 714 | /**< set input channel to '0' */ |
| 715 | |
| 716 | /* write out byte -- this is the only time we actually affect the |
| 717 | hardware as all channels are implicitly output -- but input |
| 718 | channels are set to float-high */ |
| 719 | outb(byte, ioaddr); |
| 720 | |
| 721 | /* save to io_bits */ |
| 722 | s->io_bits &= ~(1 << chan); |
| 723 | break; |
| 724 | |
| 725 | case INSN_CONFIG_DIO_QUERY: |
| 726 | /* retreive from shadow register */ |
| 727 | data[1] = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 728 | (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 729 | return insn->n; |
| 730 | break; |
| 731 | |
| 732 | default: |
| 733 | return -EINVAL; |
| 734 | break; |
| 735 | } |
| 736 | |
| 737 | return insn->n; |
| 738 | } |
| 739 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 740 | static void init_asics(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 741 | { /* sets up an |
| 742 | ASIC chip to defaults */ |
| 743 | int asic; |
| 744 | |
| 745 | for (asic = 0; asic < thisboard->dio_num_asics; ++asic) { |
| 746 | int port, page; |
| 747 | unsigned long baseaddr = devpriv->asics[asic].iobase; |
| 748 | |
| 749 | switch_page(dev, asic, 0); /* switch back to page 0 */ |
| 750 | |
| 751 | /* first, clear all the DIO port bits */ |
| 752 | for (port = 0; port < PORTS_PER_ASIC; ++port) |
| 753 | outb(0, baseaddr + REG_PORT0 + port); |
| 754 | |
| 755 | /* Next, clear all the paged registers for each page */ |
| 756 | for (page = 1; page < NUM_PAGES; ++page) { |
| 757 | int reg; |
| 758 | /* now clear all the paged registers */ |
| 759 | switch_page(dev, asic, page); |
| 760 | for (reg = FIRST_PAGED_REG; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 761 | reg < FIRST_PAGED_REG + NUM_PAGED_REGS; ++reg) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 762 | outb(0, baseaddr + reg); |
| 763 | } |
| 764 | |
| 765 | /* DEBUG set rising edge interrupts on port0 of both asics */ |
| 766 | /*switch_page(dev, asic, PAGE_POL); |
| 767 | outb(0xff, baseaddr + REG_POL0); |
| 768 | switch_page(dev, asic, PAGE_ENAB); |
| 769 | outb(0xff, baseaddr + REG_ENAB0); */ |
| 770 | /* END DEBUG */ |
| 771 | |
| 772 | switch_page(dev, asic, 0); /* switch back to default page 0 */ |
| 773 | |
| 774 | } |
| 775 | } |
| 776 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 777 | static void switch_page(struct comedi_device *dev, int asic, int page) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 778 | { |
| 779 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 780 | return; /* paranoia */ |
| 781 | if (page < 0 || page >= NUM_PAGES) |
| 782 | return; /* more paranoia */ |
| 783 | |
| 784 | devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK; |
| 785 | devpriv->asics[asic].pagelock |= page << REG_PAGE_BITOFFSET; |
| 786 | |
| 787 | /* now write out the shadow register */ |
| 788 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 789 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | #ifdef notused |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 793 | static void lock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 794 | { |
| 795 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 796 | return; /* paranoia */ |
| 797 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 798 | return; /* more paranoia */ |
| 799 | |
| 800 | devpriv->asics[asic].pagelock |= 0x1 << port; |
| 801 | /* now write out the shadow register */ |
| 802 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 803 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 804 | return; |
| 805 | } |
| 806 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 807 | static void unlock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 808 | { |
| 809 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 810 | return; /* paranoia */ |
| 811 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 812 | return; /* more paranoia */ |
| 813 | devpriv->asics[asic].pagelock &= ~(0x1 << port) | REG_LOCK_MASK; |
| 814 | /* now write out the shadow register */ |
| 815 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 816 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 817 | } |
| 818 | #endif /* notused */ |
| 819 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 820 | static irqreturn_t interrupt_pcmmio(int irq, void *d) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 821 | { |
| 822 | int asic, got1 = 0; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 823 | struct comedi_device *dev = (struct comedi_device *)d; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 824 | |
| 825 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 826 | if (irq == devpriv->asics[asic].irq) { |
| 827 | unsigned long flags; |
| 828 | unsigned triggered = 0; |
| 829 | unsigned long iobase = devpriv->asics[asic].iobase; |
| 830 | /* it is an interrupt for ASIC #asic */ |
| 831 | unsigned char int_pend; |
| 832 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 833 | spin_lock_irqsave(&devpriv->asics[asic].spinlock, |
| 834 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 835 | |
| 836 | int_pend = inb(iobase + REG_INT_PENDING) & 0x07; |
| 837 | |
| 838 | if (int_pend) { |
| 839 | int port; |
| 840 | for (port = 0; port < INTR_PORTS_PER_ASIC; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 841 | ++port) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 842 | if (int_pend & (0x1 << port)) { |
| 843 | unsigned char |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 844 | io_lines_with_edges = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 845 | switch_page(dev, asic, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 846 | PAGE_INT_ID); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 847 | io_lines_with_edges = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 848 | inb(iobase + |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 849 | REG_INT_ID0 + port); |
| 850 | |
| 851 | if (io_lines_with_edges) |
| 852 | /* clear pending interrupt */ |
| 853 | outb(0, iobase + |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 854 | REG_INT_ID0 + |
| 855 | port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 856 | |
| 857 | triggered |= |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 858 | io_lines_with_edges << |
| 859 | port * 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 860 | } |
| 861 | } |
| 862 | |
| 863 | ++got1; |
| 864 | } |
| 865 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 866 | spin_unlock_irqrestore(&devpriv->asics[asic].spinlock, |
| 867 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 868 | |
| 869 | if (triggered) { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 870 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 871 | /* TODO here: dispatch io lines to subdevs with commands.. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 872 | printk |
| 873 | ("PCMMIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", |
| 874 | irq, asic, triggered); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 875 | for (s = dev->subdevices + 2; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 876 | s < dev->subdevices + dev->n_subdevices; |
| 877 | ++s) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 878 | if (subpriv->dio.intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */ |
| 879 | unsigned long flags; |
| 880 | unsigned oldevents; |
| 881 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 882 | spin_lock_irqsave(&subpriv->dio. |
| 883 | intr.spinlock, |
| 884 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 885 | |
| 886 | oldevents = s->async->events; |
| 887 | |
| 888 | if (subpriv->dio.intr.active) { |
| 889 | unsigned mytrig = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 890 | ((triggered >> |
| 891 | subpriv->dio.intr.asic_chan) |
| 892 | & |
| 893 | ((0x1 << subpriv-> |
| 894 | dio.intr. |
| 895 | num_asic_chans) - |
| 896 | 1)) << subpriv-> |
| 897 | dio.intr.first_chan; |
| 898 | if (mytrig & |
| 899 | subpriv->dio. |
| 900 | intr.enabled_mask) { |
| 901 | unsigned int val |
| 902 | = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 903 | unsigned int n, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 904 | ch, len; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 905 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 906 | len = |
| 907 | s-> |
| 908 | async->cmd.chanlist_len; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 909 | for (n = 0; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 910 | n < len; |
| 911 | n++) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 912 | ch = CR_CHAN(s->async->cmd.chanlist[n]); |
| 913 | if (mytrig & (1U << ch)) { |
| 914 | val |= (1U << n); |
| 915 | } |
| 916 | } |
| 917 | /* Write the scan to the buffer. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 918 | if (comedi_buf_put(s->async, ((short *)&val)[0]) |
| 919 | && |
| 920 | comedi_buf_put |
| 921 | (s->async, |
| 922 | ((short *) |
| 923 | &val)[1])) |
| 924 | { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 925 | s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS); |
| 926 | } else { |
| 927 | /* Overflow! Stop acquisition!! */ |
| 928 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 929 | pcmmio_stop_intr |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 930 | (dev, |
| 931 | s); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | /* Check for end of acquisition. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 935 | if (!subpriv->dio.intr.continuous) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 936 | /* stop_src == TRIG_COUNT */ |
| 937 | if (subpriv->dio.intr.stop_count > 0) { |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 938 | subpriv->dio.intr.stop_count--; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 939 | if (subpriv->dio.intr.stop_count == 0) { |
| 940 | s->async->events |= COMEDI_CB_EOA; |
| 941 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 942 | pcmmio_stop_intr |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 943 | (dev, |
| 944 | s); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 945 | } |
| 946 | } |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 951 | spin_unlock_irqrestore |
| 952 | (&subpriv->dio.intr. |
| 953 | spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 954 | |
| 955 | if (oldevents != |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 956 | s->async->events) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 957 | comedi_event(dev, s); |
| 958 | } |
| 959 | |
| 960 | } |
| 961 | |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | } |
| 966 | } |
| 967 | if (!got1) |
| 968 | return IRQ_NONE; /* interrupt from other source */ |
| 969 | return IRQ_HANDLED; |
| 970 | } |
| 971 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 972 | static void pcmmio_stop_intr(struct comedi_device *dev, |
| 973 | struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 974 | { |
| 975 | int nports, firstport, asic, port; |
| 976 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 977 | asic = subpriv->dio.intr.asic; |
| 978 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 979 | return; /* not an interrupt subdev */ |
| 980 | |
| 981 | subpriv->dio.intr.enabled_mask = 0; |
| 982 | subpriv->dio.intr.active = 0; |
| 983 | s->async->inttrig = 0; |
| 984 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 985 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 986 | switch_page(dev, asic, PAGE_ENAB); |
| 987 | for (port = firstport; port < firstport + nports; ++port) { |
| 988 | /* disable all intrs for this subdev.. */ |
| 989 | outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port); |
| 990 | } |
| 991 | } |
| 992 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 993 | static int pcmmio_start_intr(struct comedi_device *dev, |
| 994 | struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 995 | { |
| 996 | if (!subpriv->dio.intr.continuous && subpriv->dio.intr.stop_count == 0) { |
| 997 | /* An empty acquisition! */ |
| 998 | s->async->events |= COMEDI_CB_EOA; |
| 999 | subpriv->dio.intr.active = 0; |
| 1000 | return 1; |
| 1001 | } else { |
| 1002 | unsigned bits = 0, pol_bits = 0, n; |
| 1003 | int nports, firstport, asic, port; |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 1004 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1005 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 1006 | asic = subpriv->dio.intr.asic; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1007 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1008 | return 1; /* not an interrupt |
| 1009 | subdev */ |
| 1010 | subpriv->dio.intr.enabled_mask = 0; |
| 1011 | subpriv->dio.intr.active = 1; |
| 1012 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 1013 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 1014 | if (cmd->chanlist) { |
| 1015 | for (n = 0; n < cmd->chanlist_len; n++) { |
| 1016 | bits |= (1U << CR_CHAN(cmd->chanlist[n])); |
| 1017 | pol_bits |= (CR_AREF(cmd->chanlist[n]) |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1018 | || CR_RANGE(cmd-> |
| 1019 | chanlist[n]) ? 1U : 0U) |
| 1020 | << CR_CHAN(cmd->chanlist[n]); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1021 | } |
| 1022 | } |
| 1023 | bits &= ((0x1 << subpriv->dio.intr.num_asic_chans) - |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1024 | 1) << subpriv->dio.intr.first_chan; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1025 | subpriv->dio.intr.enabled_mask = bits; |
| 1026 | |
| 1027 | { /* the below code configures the board to use a specific IRQ from 0-15. */ |
| 1028 | unsigned char b; |
| 1029 | /* set resource enable register to enable IRQ operation */ |
| 1030 | outb(1 << 4, dev->iobase + 3); |
| 1031 | /* set bits 0-3 of b to the irq number from 0-15 */ |
| 1032 | b = dev->irq & ((1 << 4) - 1); |
| 1033 | outb(b, dev->iobase + 2); |
| 1034 | /* done, we told the board what irq to use */ |
| 1035 | } |
| 1036 | |
| 1037 | switch_page(dev, asic, PAGE_ENAB); |
| 1038 | for (port = firstport; port < firstport + nports; ++port) { |
| 1039 | unsigned enab = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1040 | bits >> (subpriv->dio.intr.first_chan + (port - |
| 1041 | firstport) |
| 1042 | * 8) & 0xff, pol = |
| 1043 | pol_bits >> (subpriv->dio.intr.first_chan + |
| 1044 | (port - firstport) * 8) & 0xff; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1045 | /* set enab intrs for this subdev.. */ |
| 1046 | outb(enab, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1047 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1048 | switch_page(dev, asic, PAGE_POL); |
| 1049 | outb(pol, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1050 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1051 | } |
| 1052 | } |
| 1053 | return 0; |
| 1054 | } |
| 1055 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1056 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1057 | { |
| 1058 | unsigned long flags; |
| 1059 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1060 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1061 | if (subpriv->dio.intr.active) |
| 1062 | pcmmio_stop_intr(dev, s); |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1063 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1064 | |
| 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | /* |
| 1069 | * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice. |
| 1070 | */ |
| 1071 | static int |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1072 | pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1073 | unsigned int trignum) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1074 | { |
| 1075 | unsigned long flags; |
| 1076 | int event = 0; |
| 1077 | |
| 1078 | if (trignum != 0) |
| 1079 | return -EINVAL; |
| 1080 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1081 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1082 | s->async->inttrig = 0; |
| 1083 | if (subpriv->dio.intr.active) { |
| 1084 | event = pcmmio_start_intr(dev, s); |
| 1085 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1086 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1087 | |
| 1088 | if (event) { |
| 1089 | comedi_event(dev, s); |
| 1090 | } |
| 1091 | |
| 1092 | return 1; |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * 'do_cmd' function for an 'INTERRUPT' subdevice. |
| 1097 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1098 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1099 | { |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 1100 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1101 | unsigned long flags; |
| 1102 | int event = 0; |
| 1103 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1104 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1105 | subpriv->dio.intr.active = 1; |
| 1106 | |
| 1107 | /* Set up end of acquisition. */ |
| 1108 | switch (cmd->stop_src) { |
| 1109 | case TRIG_COUNT: |
| 1110 | subpriv->dio.intr.continuous = 0; |
| 1111 | subpriv->dio.intr.stop_count = cmd->stop_arg; |
| 1112 | break; |
| 1113 | default: |
| 1114 | /* TRIG_NONE */ |
| 1115 | subpriv->dio.intr.continuous = 1; |
| 1116 | subpriv->dio.intr.stop_count = 0; |
| 1117 | break; |
| 1118 | } |
| 1119 | |
| 1120 | /* Set up start of acquisition. */ |
| 1121 | switch (cmd->start_src) { |
| 1122 | case TRIG_INT: |
| 1123 | s->async->inttrig = pcmmio_inttrig_start_intr; |
| 1124 | break; |
| 1125 | default: |
| 1126 | /* TRIG_NOW */ |
| 1127 | event = pcmmio_start_intr(dev, s); |
| 1128 | break; |
| 1129 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1130 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1131 | |
| 1132 | if (event) { |
| 1133 | comedi_event(dev, s); |
| 1134 | } |
| 1135 | |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1139 | static int |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1140 | pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
| 1141 | struct comedi_cmd *cmd) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1142 | { |
Bill Pemberton | 0b8f754 | 2009-05-14 15:24:29 -0400 | [diff] [blame] | 1143 | return comedi_pcm_cmdtest(dev, s, cmd); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | static int adc_wait_ready(unsigned long iobase) |
| 1147 | { |
| 1148 | unsigned long retry = 100000; |
| 1149 | while (retry--) |
| 1150 | if (inb(iobase + 3) & 0x80) |
| 1151 | return 0; |
| 1152 | return 1; |
| 1153 | } |
| 1154 | |
| 1155 | /* All this is for AI and AO */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1156 | static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1157 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1158 | { |
| 1159 | int n; |
| 1160 | unsigned long iobase = subpriv->iobase; |
| 1161 | |
| 1162 | /* |
| 1163 | 1. write the CMD byte (to BASE+2) |
| 1164 | 2. read junk lo byte (BASE+0) |
| 1165 | 3. read junk hi byte (BASE+1) |
| 1166 | 4. (mux settled so) write CMD byte again (BASE+2) |
| 1167 | 5. read valid lo byte(BASE+0) |
| 1168 | 6. read valid hi byte(BASE+1) |
| 1169 | |
| 1170 | Additionally note that the BASE += 4 if the channel >= 8 |
| 1171 | */ |
| 1172 | |
| 1173 | /* convert n samples */ |
| 1174 | for (n = 0; n < insn->n; n++) { |
| 1175 | unsigned chan = CR_CHAN(insn->chanspec), range = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1176 | CR_RANGE(insn->chanspec), aref = CR_AREF(insn->chanspec); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1177 | unsigned char command_byte = 0; |
| 1178 | unsigned iooffset = 0; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 1179 | short sample, adc_adjust = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1180 | |
| 1181 | if (chan > 7) |
| 1182 | chan -= 8, iooffset = 4; /* use the second dword for channels > 7 */ |
| 1183 | |
| 1184 | if (aref != AREF_DIFF) { |
| 1185 | aref = AREF_GROUND; |
| 1186 | command_byte |= 1 << 7; /* set bit 7 to indicate single-ended */ |
| 1187 | } |
| 1188 | if (range < 2) |
| 1189 | adc_adjust = 0x8000; /* bipolar ranges (-5,5 .. -10,10 need to be adjusted -- that is.. they need to wrap around by adding 0x8000 */ |
| 1190 | |
| 1191 | if (chan % 2) { |
| 1192 | command_byte |= 1 << 6; /* odd-numbered channels have bit 6 set */ |
| 1193 | } |
| 1194 | |
| 1195 | /* select the channel, bits 4-5 == chan/2 */ |
| 1196 | command_byte |= ((chan / 2) & 0x3) << 4; |
| 1197 | |
| 1198 | /* set the range, bits 2-3 */ |
| 1199 | command_byte |= (range & 0x3) << 2; |
| 1200 | |
| 1201 | /* need to do this twice to make sure mux settled */ |
| 1202 | outb(command_byte, iobase + iooffset + 2); /* chan/range/aref select */ |
| 1203 | |
| 1204 | adc_wait_ready(iobase + iooffset); /* wait for the adc to say it finised the conversion */ |
| 1205 | |
| 1206 | outb(command_byte, iobase + iooffset + 2); /* select the chan/range/aref AGAIN */ |
| 1207 | |
| 1208 | adc_wait_ready(iobase + iooffset); |
| 1209 | |
| 1210 | sample = inb(iobase + iooffset + 0); /* read data lo byte */ |
| 1211 | sample |= inb(iobase + iooffset + 1) << 8; /* read data hi byte */ |
| 1212 | sample += adc_adjust; /* adjustment .. munge data */ |
| 1213 | data[n] = sample; |
| 1214 | } |
| 1215 | /* return the number of samples read/written */ |
| 1216 | return n; |
| 1217 | } |
| 1218 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1219 | static int ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1220 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1221 | { |
| 1222 | int n; |
| 1223 | for (n = 0; n < insn->n; n++) { |
| 1224 | unsigned chan = CR_CHAN(insn->chanspec); |
| 1225 | if (chan < s->n_chan) |
| 1226 | data[n] = subpriv->ao.shadow_samples[chan]; |
| 1227 | } |
| 1228 | return n; |
| 1229 | } |
| 1230 | |
| 1231 | static int wait_dac_ready(unsigned long iobase) |
| 1232 | { |
| 1233 | unsigned long retry = 100000L; |
| 1234 | |
| 1235 | /* This may seem like an absurd way to handle waiting and violates the |
| 1236 | "no busy waiting" policy. The fact is that the hardware is |
| 1237 | normally so fast that we usually only need one time through the loop |
| 1238 | anyway. The longer timeout is for rare occasions and for detecting |
| 1239 | non-existant hardware. */ |
| 1240 | |
| 1241 | while (retry--) { |
| 1242 | if (inb(iobase + 3) & 0x80) |
| 1243 | return 0; |
| 1244 | |
| 1245 | } |
| 1246 | return 1; |
| 1247 | } |
| 1248 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1249 | static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1250 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1251 | { |
| 1252 | int n; |
| 1253 | unsigned iobase = subpriv->iobase, iooffset = 0; |
| 1254 | |
| 1255 | for (n = 0; n < insn->n; n++) { |
| 1256 | unsigned chan = CR_CHAN(insn->chanspec), range = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1257 | CR_RANGE(insn->chanspec); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1258 | if (chan < s->n_chan) { |
| 1259 | unsigned char command_byte = 0, range_byte = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 1260 | range & ((1 << 4) - 1); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1261 | if (chan >= 4) |
| 1262 | chan -= 4, iooffset += 4; |
| 1263 | /* set the range.. */ |
| 1264 | outb(range_byte, iobase + iooffset + 0); |
| 1265 | outb(0, iobase + iooffset + 1); |
| 1266 | |
| 1267 | /* tell it to begin */ |
| 1268 | command_byte = (chan << 1) | 0x60; |
| 1269 | outb(command_byte, iobase + iooffset + 2); |
| 1270 | |
| 1271 | wait_dac_ready(iobase + iooffset); |
| 1272 | |
| 1273 | outb(data[n] & 0xff, iobase + iooffset + 0); /* low order byte */ |
| 1274 | outb((data[n] >> 8) & 0xff, iobase + iooffset + 1); /* high order byte */ |
| 1275 | command_byte = 0x70 | (chan << 1); /* set bit 4 of command byte to indicate data is loaded and trigger conversion */ |
| 1276 | /* trigger converion */ |
| 1277 | outb(command_byte, iobase + iooffset + 2); |
| 1278 | |
| 1279 | wait_dac_ready(iobase + iooffset); |
| 1280 | |
| 1281 | subpriv->ao.shadow_samples[chan] = data[n]; /* save to shadow register for ao_rinsn */ |
| 1282 | } |
| 1283 | } |
| 1284 | return n; |
| 1285 | } |
| 1286 | |
| 1287 | /* |
| 1288 | * A convenient macro that defines init_module() and cleanup_module(), |
| 1289 | * as necessary. |
| 1290 | */ |
| 1291 | COMEDI_INITCLEANUP(driver); |