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 |
| 35 | subdevice 2 - first 24 channels of the 48 channel of DIO (with edge-triggered interrupt support) |
| 36 | subdevice 3 - last 24 channels of the 48 channel DIO (no interrupt support for this bank of channels) |
| 37 | |
| 38 | Some notes: |
| 39 | |
| 40 | Synchronous reads and writes are the only things implemented for AI and AO, |
| 41 | even though the hardware itself can do streaming acquisition, etc. Anyone |
| 42 | want to add asynchronous I/O for AI/AO as a feature? Be my guest... |
| 43 | |
| 44 | Asynchronous I/O for the DIO subdevices *is* implemented, however! They are |
| 45 | basically edge-triggered interrupts for any configuration of the first |
| 46 | 24 DIO-lines. |
| 47 | |
| 48 | Also note that this interrupt support is untested. |
| 49 | |
| 50 | A few words about edge-detection IRQ support (commands on DIO): |
| 51 | |
| 52 | * To use edge-detection IRQ support for the DIO subdevice, pass the IRQ |
| 53 | of the board to the comedi_config command. The board IRQ is not jumpered |
| 54 | but rather configured through software, so any IRQ from 1-15 is OK. |
| 55 | |
| 56 | * Due to the genericity of the comedi API, you need to create a special |
| 57 | comedi_command in order to use edge-triggered interrupts for DIO. |
| 58 | |
| 59 | * Use comedi_commands with TRIG_NOW. Your callback will be called each |
| 60 | time an edge is detected on the specified DIO line(s), and the data |
| 61 | values will be two sample_t's, which should be concatenated to form |
| 62 | one 32-bit unsigned int. This value is the mask of channels that had |
| 63 | edges detected from your channel list. Note that the bits positions |
| 64 | in the mask correspond to positions in your chanlist when you |
| 65 | specified the command and *not* channel id's! |
| 66 | |
| 67 | * To set the polarity of the edge-detection interrupts pass a nonzero value |
| 68 | for either CR_RANGE or CR_AREF for edge-up polarity, or a zero |
| 69 | value for both CR_RANGE and CR_AREF if you want edge-down polarity. |
| 70 | |
| 71 | Configuration Options: |
| 72 | [0] - I/O port base address |
| 73 | [1] - IRQ (optional -- for edge-detect interrupt support only, leave out if you don't need this feature) |
| 74 | */ |
| 75 | |
Greg Kroah-Hartman | 25436dc | 2009-04-27 15:14:34 -0700 | [diff] [blame] | 76 | #include <linux/interrupt.h> |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 77 | #include "../comedidev.h" |
| 78 | #include <linux/pci.h> /* for PCI devices */ |
| 79 | |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 80 | /* This stuff is all from pcmuio.c -- it refers to the DIO subdevices only */ |
| 81 | #define CHANS_PER_PORT 8 |
| 82 | #define PORTS_PER_ASIC 6 |
| 83 | #define INTR_PORTS_PER_ASIC 3 |
| 84 | #define MAX_CHANS_PER_SUBDEV 24 /* number of channels per comedi subdevice */ |
| 85 | #define PORTS_PER_SUBDEV (MAX_CHANS_PER_SUBDEV/CHANS_PER_PORT) |
| 86 | #define CHANS_PER_ASIC (CHANS_PER_PORT*PORTS_PER_ASIC) |
| 87 | #define INTR_CHANS_PER_ASIC 24 |
| 88 | #define INTR_PORTS_PER_SUBDEV (INTR_CHANS_PER_ASIC/CHANS_PER_PORT) |
| 89 | #define MAX_DIO_CHANS (PORTS_PER_ASIC*1*CHANS_PER_PORT) |
| 90 | #define MAX_ASICS (MAX_DIO_CHANS/CHANS_PER_ASIC) |
| 91 | #define SDEV_NO ((int)(s - dev->subdevices)) |
| 92 | #define CALC_N_DIO_SUBDEVS(nchans) ((nchans)/MAX_CHANS_PER_SUBDEV + (!!((nchans)%MAX_CHANS_PER_SUBDEV)) /*+ (nchans > INTR_CHANS_PER_ASIC ? 2 : 1)*/) |
| 93 | /* IO Memory sizes */ |
| 94 | #define ASIC_IOSIZE (0x0B) |
| 95 | #define PCMMIO48_IOSIZE ASIC_IOSIZE |
| 96 | |
| 97 | /* Some offsets - these are all in the 16byte IO memory offset from |
| 98 | the base address. Note that there is a paging scheme to swap out |
| 99 | offsets 0x8-0xA using the PAGELOCK register. See the table below. |
| 100 | |
| 101 | Register(s) Pages R/W? Description |
| 102 | -------------------------------------------------------------- |
| 103 | REG_PORTx All R/W Read/Write/Configure IO |
| 104 | REG_INT_PENDING All ReadOnly Quickly see which INT_IDx has int. |
| 105 | REG_PAGELOCK All WriteOnly Select a page |
| 106 | REG_POLx Pg. 1 only WriteOnly Select edge-detection polarity |
| 107 | REG_ENABx Pg. 2 only WriteOnly Enable/Disable edge-detect. int. |
| 108 | REG_INT_IDx Pg. 3 only R/W See which ports/bits have ints. |
| 109 | */ |
| 110 | #define REG_PORT0 0x0 |
| 111 | #define REG_PORT1 0x1 |
| 112 | #define REG_PORT2 0x2 |
| 113 | #define REG_PORT3 0x3 |
| 114 | #define REG_PORT4 0x4 |
| 115 | #define REG_PORT5 0x5 |
| 116 | #define REG_INT_PENDING 0x6 |
| 117 | #define REG_PAGELOCK 0x7 /* page selector register, upper 2 bits select a page |
| 118 | and bits 0-5 are used to 'lock down' a particular |
| 119 | port above to make it readonly. */ |
| 120 | #define REG_POL0 0x8 |
| 121 | #define REG_POL1 0x9 |
| 122 | #define REG_POL2 0xA |
| 123 | #define REG_ENAB0 0x8 |
| 124 | #define REG_ENAB1 0x9 |
| 125 | #define REG_ENAB2 0xA |
| 126 | #define REG_INT_ID0 0x8 |
| 127 | #define REG_INT_ID1 0x9 |
| 128 | #define REG_INT_ID2 0xA |
| 129 | |
| 130 | #define NUM_PAGED_REGS 3 |
| 131 | #define NUM_PAGES 4 |
| 132 | #define FIRST_PAGED_REG 0x8 |
| 133 | #define REG_PAGE_BITOFFSET 6 |
| 134 | #define REG_LOCK_BITOFFSET 0 |
| 135 | #define REG_PAGE_MASK (~((0x1<<REG_PAGE_BITOFFSET)-1)) |
| 136 | #define REG_LOCK_MASK ~(REG_PAGE_MASK) |
| 137 | #define PAGE_POL 1 |
| 138 | #define PAGE_ENAB 2 |
| 139 | #define PAGE_INT_ID 3 |
| 140 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 141 | typedef int (*comedi_insn_fn_t) (struct comedi_device *, struct comedi_subdevice *, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 142 | struct comedi_insn *, unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 143 | |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 144 | static int ai_rinsn(struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 145 | unsigned int *); |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 146 | static int ao_rinsn(struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 147 | unsigned int *); |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 148 | static int ao_winsn(struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 149 | unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 150 | |
| 151 | /* |
| 152 | * Board descriptions for two imaginary boards. Describing the |
| 153 | * boards in this way is optional, and completely driver-dependent. |
| 154 | * Some drivers use arrays such as this, other do not. |
| 155 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 156 | struct pcmmio_board { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 157 | const char *name; |
| 158 | const int dio_num_asics; |
| 159 | const int dio_num_ports; |
| 160 | const int total_iosize; |
| 161 | const int ai_bits; |
| 162 | const int ao_bits; |
| 163 | const int n_ai_chans; |
| 164 | const int n_ao_chans; |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 165 | const struct comedi_lrange *ai_range_table, *ao_range_table; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 166 | comedi_insn_fn_t ai_rinsn, ao_rinsn, ao_winsn; |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 167 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 168 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 169 | static const struct comedi_lrange ranges_ai = |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 170 | { 4, {RANGE(-5., 5.), RANGE(-10., 10.), RANGE(0., 5.), RANGE(0., |
| 171 | 10.)} |
| 172 | }; |
| 173 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 174 | static const struct comedi_lrange ranges_ao = |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 175 | { 6, {RANGE(0., 5.), RANGE(0., 10.), RANGE(-5., 5.), RANGE(-10., 10.), |
| 176 | RANGE(-2.5, 2.5), RANGE(-2.5, 7.5)} |
| 177 | }; |
| 178 | |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 179 | static const struct pcmmio_board pcmmio_boards[] = { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 180 | { |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 181 | .name = "pcmmio", |
| 182 | .dio_num_asics = 1, |
| 183 | .dio_num_ports = 6, |
| 184 | .total_iosize = 32, |
| 185 | .ai_bits = 16, |
| 186 | .ao_bits = 16, |
| 187 | .n_ai_chans = 16, |
| 188 | .n_ao_chans = 8, |
| 189 | .ai_range_table = &ranges_ai, |
| 190 | .ao_range_table = &ranges_ao, |
| 191 | .ai_rinsn = ai_rinsn, |
| 192 | .ao_rinsn = ao_rinsn, |
| 193 | .ao_winsn = ao_winsn}, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 194 | }; |
| 195 | |
| 196 | /* |
| 197 | * Useful for shorthand access to the particular board structure |
| 198 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 199 | #define thisboard ((const struct pcmmio_board *)dev->board_ptr) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 200 | |
| 201 | /* this structure is for data unique to this subdevice. */ |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 202 | struct pcmmio_subdev_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 203 | |
| 204 | union { |
| 205 | /* for DIO: mapping of halfwords (bytes) in port/chanarray to iobase */ |
| 206 | unsigned long iobases[PORTS_PER_SUBDEV]; |
| 207 | |
| 208 | /* for AI/AO */ |
| 209 | unsigned long iobase; |
| 210 | }; |
| 211 | union { |
| 212 | struct { |
| 213 | |
| 214 | /* The below is only used for intr subdevices */ |
| 215 | struct { |
| 216 | int asic; /* if non-negative, this subdev has an interrupt asic */ |
| 217 | int first_chan; /* if nonnegative, the first channel id for |
| 218 | interrupts. */ |
| 219 | int num_asic_chans; /* the number of asic channels in this subdev |
| 220 | that have interrutps */ |
| 221 | int asic_chan; /* if nonnegative, the first channel id with |
| 222 | respect to the asic that has interrupts */ |
| 223 | int enabled_mask; /* subdev-relative channel mask for channels |
| 224 | we are interested in */ |
| 225 | int active; |
| 226 | int stop_count; |
| 227 | int continuous; |
| 228 | spinlock_t spinlock; |
| 229 | } intr; |
| 230 | } dio; |
| 231 | struct { |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 232 | unsigned int shadow_samples[8]; /* the last unsigned int data written */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 233 | } ao; |
| 234 | }; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 235 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 236 | |
| 237 | /* this structure is for data unique to this hardware driver. If |
| 238 | several hardware drivers keep similar information in this structure, |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 239 | feel free to suggest moving the variable to the struct comedi_device struct. */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 240 | struct pcmmio_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 241 | /* stuff for DIO */ |
| 242 | struct { |
| 243 | unsigned char pagelock; /* current page and lock */ |
| 244 | unsigned char pol[NUM_PAGED_REGS]; /* shadow of POLx registers */ |
| 245 | unsigned char enab[NUM_PAGED_REGS]; /* shadow of ENABx registers */ |
| 246 | int num; |
| 247 | unsigned long iobase; |
| 248 | unsigned int irq; |
| 249 | spinlock_t spinlock; |
| 250 | } asics[MAX_ASICS]; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 251 | struct pcmmio_subdev_private *sprivs; |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 252 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 253 | |
| 254 | /* |
| 255 | * most drivers define the following macro to make it easy to |
| 256 | * access the private structure. |
| 257 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 258 | #define devpriv ((struct pcmmio_private *)dev->private) |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 259 | #define subpriv ((struct pcmmio_subdev_private *)s->private) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 260 | /* |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 261 | * The struct comedi_driver structure tells the Comedi core module |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 262 | * which functions to call to configure/deconfigure (attach/detach) |
| 263 | * the board, and also about the kernel module that contains |
| 264 | * the device code. |
| 265 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 266 | static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
| 267 | static int pcmmio_detach(struct comedi_device *dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 268 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 269 | static struct comedi_driver driver = { |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 270 | .driver_name = "pcmmio", |
| 271 | .module = THIS_MODULE, |
| 272 | .attach = pcmmio_attach, |
| 273 | .detach = pcmmio_detach, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 274 | /* It is not necessary to implement the following members if you are |
| 275 | * writing a driver for a ISA PnP or PCI card */ |
| 276 | /* Most drivers will support multiple types of boards by |
| 277 | * having an array of board structures. These were defined |
| 278 | * in pcmmio_boards[] above. Note that the element 'name' |
| 279 | * was first in the structure -- Comedi uses this fact to |
| 280 | * extract the name of the board without knowing any details |
| 281 | * about the structure except for its length. |
| 282 | * When a device is attached (by comedi_config), the name |
| 283 | * of the device is given to Comedi, and Comedi tries to |
| 284 | * match it by going through the list of board names. If |
| 285 | * there is a match, the address of the pointer is put |
| 286 | * into dev->board_ptr and driver->attach() is called. |
| 287 | * |
| 288 | * Note that these are not necessary if you can determine |
| 289 | * the type of board in software. ISA PnP, PCI, and PCMCIA |
| 290 | * devices are such boards. |
| 291 | */ |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 292 | .board_name = &pcmmio_boards[0].name, |
| 293 | .offset = sizeof(struct pcmmio_board), |
Bill Pemberton | 8629efa | 2009-04-23 15:54:56 -0400 | [diff] [blame] | 294 | .num_names = ARRAY_SIZE(pcmmio_boards), |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 295 | }; |
| 296 | |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 297 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
| 298 | struct comedi_insn *insn, unsigned int *data); |
| 299 | static int pcmmio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, |
| 300 | struct comedi_insn *insn, unsigned int *data); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 301 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 302 | static irqreturn_t interrupt_pcmmio(int irq, void *d); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 303 | static void pcmmio_stop_intr(struct comedi_device *, struct comedi_subdevice *); |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 304 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s); |
| 305 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s); |
| 306 | static int pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
| 307 | struct comedi_cmd *cmd); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 308 | |
| 309 | /* some helper functions to deal with specifics of this device's registers */ |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 310 | static void init_asics(struct comedi_device *dev); /* sets up/clears ASIC chips to defaults */ |
| 311 | static void switch_page(struct comedi_device *dev, int asic, int page); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 312 | #ifdef notused |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 313 | static void lock_port(struct comedi_device *dev, int asic, int port); |
| 314 | static void unlock_port(struct comedi_device *dev, int asic, int port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 315 | #endif |
| 316 | |
| 317 | /* |
| 318 | * Attach is called by the Comedi core to configure the driver |
| 319 | * for a particular board. If you specified a board_name array |
| 320 | * in the driver structure, dev->board_ptr contains that |
| 321 | * address. |
| 322 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 323 | static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 324 | { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 325 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 326 | int sdev_no, chans_left, n_dio_subdevs, n_subdevs, port, asic, |
| 327 | thisasic_chanct = 0; |
| 328 | unsigned long iobase; |
| 329 | unsigned int irq[MAX_ASICS]; |
| 330 | |
| 331 | iobase = it->options[0]; |
| 332 | irq[0] = it->options[1]; |
| 333 | |
| 334 | printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name, |
| 335 | iobase); |
| 336 | |
| 337 | dev->iobase = iobase; |
| 338 | |
| 339 | if (!iobase || !request_region(iobase, |
| 340 | thisboard->total_iosize, driver.driver_name)) { |
| 341 | printk("I/O port conflict\n"); |
| 342 | return -EIO; |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * Initialize dev->board_name. Note that we can use the "thisboard" |
| 347 | * macro now, since we just initialized it in the last line. |
| 348 | */ |
| 349 | dev->board_name = thisboard->name; |
| 350 | |
| 351 | /* |
| 352 | * Allocate the private structure area. alloc_private() is a |
| 353 | * convenient macro defined in comedidev.h. |
| 354 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 355 | if (alloc_private(dev, sizeof(struct pcmmio_private)) < 0) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 356 | printk("cannot allocate private data structure\n"); |
| 357 | return -ENOMEM; |
| 358 | } |
| 359 | |
| 360 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 361 | devpriv->asics[asic].num = asic; |
| 362 | devpriv->asics[asic].iobase = |
| 363 | dev->iobase + 16 + asic * ASIC_IOSIZE; |
| 364 | devpriv->asics[asic].irq = 0; /* this gets actually set at the end of |
| 365 | this function when we |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 366 | request_irqs */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 367 | spin_lock_init(&devpriv->asics[asic].spinlock); |
| 368 | } |
| 369 | |
| 370 | chans_left = CHANS_PER_ASIC * thisboard->dio_num_asics; |
| 371 | n_dio_subdevs = CALC_N_DIO_SUBDEVS(chans_left); |
| 372 | n_subdevs = n_dio_subdevs + 2; |
| 373 | devpriv->sprivs = |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 374 | kcalloc(n_subdevs, sizeof(struct pcmmio_subdev_private), GFP_KERNEL); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 375 | if (!devpriv->sprivs) { |
| 376 | printk("cannot allocate subdevice private data structures\n"); |
| 377 | return -ENOMEM; |
| 378 | } |
| 379 | /* |
| 380 | * Allocate the subdevice structures. alloc_subdevice() is a |
| 381 | * convenient macro defined in comedidev.h. |
| 382 | * |
| 383 | * Allocate 1 AI + 1 AO + 2 DIO subdevs (24 lines per DIO) |
| 384 | */ |
| 385 | if (alloc_subdevices(dev, n_subdevs) < 0) { |
| 386 | printk("cannot allocate subdevice data structures\n"); |
| 387 | return -ENOMEM; |
| 388 | } |
| 389 | |
| 390 | /* First, AI */ |
| 391 | sdev_no = 0; |
| 392 | s = dev->subdevices + sdev_no; |
| 393 | s->private = devpriv->sprivs + sdev_no; |
| 394 | s->maxdata = (1 << thisboard->ai_bits) - 1; |
| 395 | s->range_table = thisboard->ai_range_table; |
| 396 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; |
| 397 | s->type = COMEDI_SUBD_AI; |
| 398 | s->n_chan = thisboard->n_ai_chans; |
| 399 | s->len_chanlist = s->n_chan; |
| 400 | s->insn_read = thisboard->ai_rinsn; |
| 401 | subpriv->iobase = dev->iobase + 0; |
| 402 | /* initialize the resource enable register by clearing it */ |
| 403 | outb(0, subpriv->iobase + 3); |
| 404 | outb(0, subpriv->iobase + 4 + 3); |
| 405 | |
| 406 | /* Next, AO */ |
| 407 | ++sdev_no; |
| 408 | s = dev->subdevices + sdev_no; |
| 409 | s->private = devpriv->sprivs + sdev_no; |
| 410 | s->maxdata = (1 << thisboard->ao_bits) - 1; |
| 411 | s->range_table = thisboard->ao_range_table; |
| 412 | s->subdev_flags = SDF_READABLE; |
| 413 | s->type = COMEDI_SUBD_AO; |
| 414 | s->n_chan = thisboard->n_ao_chans; |
| 415 | s->len_chanlist = s->n_chan; |
| 416 | s->insn_read = thisboard->ao_rinsn; |
| 417 | s->insn_write = thisboard->ao_winsn; |
| 418 | subpriv->iobase = dev->iobase + 8; |
| 419 | /* initialize the resource enable register by clearing it */ |
| 420 | outb(0, subpriv->iobase + 3); |
| 421 | outb(0, subpriv->iobase + 4 + 3); |
| 422 | |
| 423 | ++sdev_no; |
| 424 | port = 0; |
| 425 | asic = 0; |
| 426 | for (; sdev_no < (int)dev->n_subdevices; ++sdev_no) { |
| 427 | int byte_no; |
| 428 | |
| 429 | s = dev->subdevices + sdev_no; |
| 430 | s->private = devpriv->sprivs + sdev_no; |
| 431 | s->maxdata = 1; |
| 432 | s->range_table = &range_digital; |
| 433 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
| 434 | s->type = COMEDI_SUBD_DIO; |
| 435 | s->insn_bits = pcmmio_dio_insn_bits; |
| 436 | s->insn_config = pcmmio_dio_insn_config; |
Bill Pemberton | 214e7b5 | 2009-05-14 15:24:28 -0400 | [diff] [blame^] | 437 | s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 438 | subpriv->dio.intr.asic = -1; |
| 439 | subpriv->dio.intr.first_chan = -1; |
| 440 | subpriv->dio.intr.asic_chan = -1; |
| 441 | subpriv->dio.intr.num_asic_chans = -1; |
| 442 | subpriv->dio.intr.active = 0; |
| 443 | s->len_chanlist = 1; |
| 444 | |
| 445 | /* save the ioport address for each 'port' of 8 channels in the |
| 446 | subdevice */ |
| 447 | for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) { |
| 448 | if (port >= PORTS_PER_ASIC) { |
| 449 | port = 0; |
| 450 | ++asic; |
| 451 | thisasic_chanct = 0; |
| 452 | } |
| 453 | subpriv->iobases[byte_no] = |
| 454 | devpriv->asics[asic].iobase + port; |
| 455 | |
| 456 | if (thisasic_chanct < |
| 457 | CHANS_PER_PORT * INTR_PORTS_PER_ASIC |
| 458 | && subpriv->dio.intr.asic < 0) { |
| 459 | /* this is an interrupt subdevice, so setup the struct */ |
| 460 | subpriv->dio.intr.asic = asic; |
| 461 | subpriv->dio.intr.active = 0; |
| 462 | subpriv->dio.intr.stop_count = 0; |
| 463 | subpriv->dio.intr.first_chan = byte_no * 8; |
| 464 | subpriv->dio.intr.asic_chan = thisasic_chanct; |
| 465 | subpriv->dio.intr.num_asic_chans = |
| 466 | s->n_chan - |
| 467 | subpriv->dio.intr.first_chan; |
| 468 | s->cancel = pcmmio_cancel; |
| 469 | s->do_cmd = pcmmio_cmd; |
| 470 | s->do_cmdtest = pcmmio_cmdtest; |
| 471 | s->len_chanlist = |
| 472 | subpriv->dio.intr.num_asic_chans; |
| 473 | } |
| 474 | thisasic_chanct += CHANS_PER_PORT; |
| 475 | } |
| 476 | spin_lock_init(&subpriv->dio.intr.spinlock); |
| 477 | |
| 478 | chans_left -= s->n_chan; |
| 479 | |
| 480 | if (!chans_left) { |
| 481 | asic = 0; /* reset the asic to our first asic, to do intr subdevs */ |
| 482 | port = 0; |
| 483 | } |
| 484 | |
| 485 | } |
| 486 | |
| 487 | init_asics(dev); /* clear out all the registers, basically */ |
| 488 | |
| 489 | for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) { |
| 490 | if (irq[asic] |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 491 | && request_irq(irq[asic], interrupt_pcmmio, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 492 | IRQF_SHARED, thisboard->name, dev)) { |
| 493 | int i; |
| 494 | /* unroll the allocated irqs.. */ |
| 495 | for (i = asic - 1; i >= 0; --i) { |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 496 | free_irq(irq[i], dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 497 | devpriv->asics[i].irq = irq[i] = 0; |
| 498 | } |
| 499 | irq[asic] = 0; |
| 500 | } |
| 501 | devpriv->asics[asic].irq = irq[asic]; |
| 502 | } |
| 503 | |
| 504 | dev->irq = irq[0]; /* grr.. wish comedi dev struct supported multiple |
| 505 | irqs.. */ |
| 506 | |
| 507 | if (irq[0]) { |
| 508 | printk("irq: %u ", irq[0]); |
| 509 | if (irq[1] && thisboard->dio_num_asics == 2) |
| 510 | printk("second ASIC irq: %u ", irq[1]); |
| 511 | } else { |
| 512 | printk("(IRQ mode disabled) "); |
| 513 | } |
| 514 | |
| 515 | printk("attached\n"); |
| 516 | |
| 517 | return 1; |
| 518 | } |
| 519 | |
| 520 | /* |
| 521 | * _detach is called to deconfigure a device. It should deallocate |
| 522 | * resources. |
| 523 | * This function is also called when _attach() fails, so it should be |
| 524 | * careful not to release resources that were not necessarily |
| 525 | * allocated by _attach(). dev->private and dev->subdevices are |
| 526 | * deallocated automatically by the core. |
| 527 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 528 | static int pcmmio_detach(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 529 | { |
| 530 | int i; |
| 531 | |
| 532 | printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name); |
| 533 | if (dev->iobase) |
| 534 | release_region(dev->iobase, thisboard->total_iosize); |
| 535 | |
| 536 | for (i = 0; i < MAX_ASICS; ++i) { |
| 537 | if (devpriv && devpriv->asics[i].irq) |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 538 | free_irq(devpriv->asics[i].irq, dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | if (devpriv && devpriv->sprivs) |
| 542 | kfree(devpriv->sprivs); |
| 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | /* DIO devices are slightly special. Although it is possible to |
| 548 | * implement the insn_read/insn_write interface, it is much more |
| 549 | * useful to applications if you implement the insn_bits interface. |
| 550 | * This allows packed reading/writing of the DIO channels. The |
| 551 | * comedi core can convert between insn_bits and insn_read/write */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 552 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
| 553 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 554 | { |
| 555 | int byte_no; |
| 556 | if (insn->n != 2) |
| 557 | return -EINVAL; |
| 558 | |
| 559 | /* NOTE: |
| 560 | reading a 0 means this channel was high |
| 561 | writine a 0 sets the channel high |
| 562 | reading a 1 means this channel was low |
| 563 | writing a 1 means set this channel low |
| 564 | |
| 565 | Therefore everything is always inverted. */ |
| 566 | |
| 567 | /* The insn data is a mask in data[0] and the new data |
| 568 | * in data[1], each channel cooresponding to a bit. */ |
| 569 | |
| 570 | #ifdef DAMMIT_ITS_BROKEN |
| 571 | /* DEBUG */ |
| 572 | printk("write mask: %08x data: %08x\n", data[0], data[1]); |
| 573 | #endif |
| 574 | |
| 575 | s->state = 0; |
| 576 | |
| 577 | for (byte_no = 0; byte_no < s->n_chan / CHANS_PER_PORT; ++byte_no) { |
| 578 | /* address of 8-bit port */ |
| 579 | unsigned long ioaddr = subpriv->iobases[byte_no], |
| 580 | /* bit offset of port in 32-bit doubleword */ |
| 581 | offset = byte_no * 8; |
| 582 | /* this 8-bit port's data */ |
| 583 | unsigned char byte = 0, |
| 584 | /* The write mask for this port (if any) */ |
| 585 | write_mask_byte = (data[0] >> offset) & 0xff, |
| 586 | /* The data byte for this port */ |
| 587 | data_byte = (data[1] >> offset) & 0xff; |
| 588 | |
| 589 | byte = inb(ioaddr); /* read all 8-bits for this port */ |
| 590 | |
| 591 | #ifdef DAMMIT_ITS_BROKEN |
| 592 | /* DEBUG */ |
| 593 | printk("byte %d wmb %02x db %02x offset %02d io %04x, data_in %02x ", byte_no, (unsigned)write_mask_byte, (unsigned)data_byte, offset, ioaddr, (unsigned)byte); |
| 594 | #endif |
| 595 | |
| 596 | if (write_mask_byte) { |
| 597 | /* this byte has some write_bits -- so set the output lines */ |
| 598 | byte &= ~write_mask_byte; /* clear bits for write mask */ |
| 599 | byte |= ~data_byte & write_mask_byte; /* set to inverted data_byte */ |
| 600 | /* Write out the new digital output state */ |
| 601 | outb(byte, ioaddr); |
| 602 | } |
| 603 | #ifdef DAMMIT_ITS_BROKEN |
| 604 | /* DEBUG */ |
| 605 | printk("data_out_byte %02x\n", (unsigned)byte); |
| 606 | #endif |
| 607 | /* save the digital input lines for this byte.. */ |
| 608 | s->state |= ((unsigned int)byte) << offset; |
| 609 | } |
| 610 | |
| 611 | /* now return the DIO lines to data[1] - note they came inverted! */ |
| 612 | data[1] = ~s->state; |
| 613 | |
| 614 | #ifdef DAMMIT_ITS_BROKEN |
| 615 | /* DEBUG */ |
| 616 | printk("s->state %08x data_out %08x\n", s->state, data[1]); |
| 617 | #endif |
| 618 | |
| 619 | return 2; |
| 620 | } |
| 621 | |
| 622 | /* The input or output configuration of each digital line is |
| 623 | * configured by a special insn_config instruction. chanspec |
| 624 | * contains the channel to be changed, and data[0] contains the |
| 625 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 626 | static int pcmmio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, |
| 627 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 628 | { |
| 629 | int chan = CR_CHAN(insn->chanspec), byte_no = chan / 8, bit_no = |
| 630 | chan % 8; |
| 631 | unsigned long ioaddr; |
| 632 | unsigned char byte; |
| 633 | |
| 634 | /* Compute ioaddr for this channel */ |
| 635 | ioaddr = subpriv->iobases[byte_no]; |
| 636 | |
| 637 | /* NOTE: |
| 638 | writing a 0 an IO channel's bit sets the channel to INPUT |
| 639 | and pulls the line high as well |
| 640 | |
| 641 | writing a 1 to an IO channel's bit pulls the line low |
| 642 | |
| 643 | All channels are implicitly always in OUTPUT mode -- but when |
| 644 | they are high they can be considered to be in INPUT mode.. |
| 645 | |
| 646 | Thus, we only force channels low if the config request was INPUT, |
| 647 | otherwise we do nothing to the hardware. */ |
| 648 | |
| 649 | switch (data[0]) { |
| 650 | case INSN_CONFIG_DIO_OUTPUT: |
| 651 | /* save to io_bits -- don't actually do anything since |
| 652 | all input channels are also output channels... */ |
| 653 | s->io_bits |= 1 << chan; |
| 654 | break; |
| 655 | case INSN_CONFIG_DIO_INPUT: |
| 656 | /* write a 0 to the actual register representing the channel |
| 657 | to set it to 'input'. 0 means "float high". */ |
| 658 | byte = inb(ioaddr); |
| 659 | byte &= ~(1 << bit_no); |
| 660 | /**< set input channel to '0' */ |
| 661 | |
| 662 | /* write out byte -- this is the only time we actually affect the |
| 663 | hardware as all channels are implicitly output -- but input |
| 664 | channels are set to float-high */ |
| 665 | outb(byte, ioaddr); |
| 666 | |
| 667 | /* save to io_bits */ |
| 668 | s->io_bits &= ~(1 << chan); |
| 669 | break; |
| 670 | |
| 671 | case INSN_CONFIG_DIO_QUERY: |
| 672 | /* retreive from shadow register */ |
| 673 | data[1] = |
| 674 | (s-> |
| 675 | io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; |
| 676 | return insn->n; |
| 677 | break; |
| 678 | |
| 679 | default: |
| 680 | return -EINVAL; |
| 681 | break; |
| 682 | } |
| 683 | |
| 684 | return insn->n; |
| 685 | } |
| 686 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 687 | static void init_asics(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 688 | { /* sets up an |
| 689 | ASIC chip to defaults */ |
| 690 | int asic; |
| 691 | |
| 692 | for (asic = 0; asic < thisboard->dio_num_asics; ++asic) { |
| 693 | int port, page; |
| 694 | unsigned long baseaddr = devpriv->asics[asic].iobase; |
| 695 | |
| 696 | switch_page(dev, asic, 0); /* switch back to page 0 */ |
| 697 | |
| 698 | /* first, clear all the DIO port bits */ |
| 699 | for (port = 0; port < PORTS_PER_ASIC; ++port) |
| 700 | outb(0, baseaddr + REG_PORT0 + port); |
| 701 | |
| 702 | /* Next, clear all the paged registers for each page */ |
| 703 | for (page = 1; page < NUM_PAGES; ++page) { |
| 704 | int reg; |
| 705 | /* now clear all the paged registers */ |
| 706 | switch_page(dev, asic, page); |
| 707 | for (reg = FIRST_PAGED_REG; |
| 708 | reg < FIRST_PAGED_REG + NUM_PAGED_REGS; ++reg) |
| 709 | outb(0, baseaddr + reg); |
| 710 | } |
| 711 | |
| 712 | /* DEBUG set rising edge interrupts on port0 of both asics */ |
| 713 | /*switch_page(dev, asic, PAGE_POL); |
| 714 | outb(0xff, baseaddr + REG_POL0); |
| 715 | switch_page(dev, asic, PAGE_ENAB); |
| 716 | outb(0xff, baseaddr + REG_ENAB0); */ |
| 717 | /* END DEBUG */ |
| 718 | |
| 719 | switch_page(dev, asic, 0); /* switch back to default page 0 */ |
| 720 | |
| 721 | } |
| 722 | } |
| 723 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 724 | static void switch_page(struct comedi_device *dev, int asic, int page) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 725 | { |
| 726 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 727 | return; /* paranoia */ |
| 728 | if (page < 0 || page >= NUM_PAGES) |
| 729 | return; /* more paranoia */ |
| 730 | |
| 731 | devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK; |
| 732 | devpriv->asics[asic].pagelock |= page << REG_PAGE_BITOFFSET; |
| 733 | |
| 734 | /* now write out the shadow register */ |
| 735 | outb(devpriv->asics[asic].pagelock, |
| 736 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
| 737 | } |
| 738 | |
| 739 | #ifdef notused |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 740 | static void lock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 741 | { |
| 742 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 743 | return; /* paranoia */ |
| 744 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 745 | return; /* more paranoia */ |
| 746 | |
| 747 | devpriv->asics[asic].pagelock |= 0x1 << port; |
| 748 | /* now write out the shadow register */ |
| 749 | outb(devpriv->asics[asic].pagelock, |
| 750 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
| 751 | return; |
| 752 | } |
| 753 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 754 | static void unlock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 755 | { |
| 756 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 757 | return; /* paranoia */ |
| 758 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 759 | return; /* more paranoia */ |
| 760 | devpriv->asics[asic].pagelock &= ~(0x1 << port) | REG_LOCK_MASK; |
| 761 | /* now write out the shadow register */ |
| 762 | outb(devpriv->asics[asic].pagelock, |
| 763 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
| 764 | } |
| 765 | #endif /* notused */ |
| 766 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 767 | static irqreturn_t interrupt_pcmmio(int irq, void *d) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 768 | { |
| 769 | int asic, got1 = 0; |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 770 | struct comedi_device *dev = (struct comedi_device *) d; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 771 | |
| 772 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 773 | if (irq == devpriv->asics[asic].irq) { |
| 774 | unsigned long flags; |
| 775 | unsigned triggered = 0; |
| 776 | unsigned long iobase = devpriv->asics[asic].iobase; |
| 777 | /* it is an interrupt for ASIC #asic */ |
| 778 | unsigned char int_pend; |
| 779 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 780 | spin_lock_irqsave(&devpriv->asics[asic].spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 781 | |
| 782 | int_pend = inb(iobase + REG_INT_PENDING) & 0x07; |
| 783 | |
| 784 | if (int_pend) { |
| 785 | int port; |
| 786 | for (port = 0; port < INTR_PORTS_PER_ASIC; |
| 787 | ++port) { |
| 788 | if (int_pend & (0x1 << port)) { |
| 789 | unsigned char |
| 790 | io_lines_with_edges = 0; |
| 791 | switch_page(dev, asic, |
| 792 | PAGE_INT_ID); |
| 793 | io_lines_with_edges = |
| 794 | inb(iobase + |
| 795 | REG_INT_ID0 + port); |
| 796 | |
| 797 | if (io_lines_with_edges) |
| 798 | /* clear pending interrupt */ |
| 799 | outb(0, iobase + |
| 800 | REG_INT_ID0 + |
| 801 | port); |
| 802 | |
| 803 | triggered |= |
| 804 | io_lines_with_edges << |
| 805 | port * 8; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | ++got1; |
| 810 | } |
| 811 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 812 | spin_unlock_irqrestore(&devpriv->asics[asic]. spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 813 | |
| 814 | if (triggered) { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 815 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 816 | /* TODO here: dispatch io lines to subdevs with commands.. */ |
| 817 | printk("PCMMIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", irq, asic, triggered); |
| 818 | for (s = dev->subdevices + 2; |
| 819 | s < dev->subdevices + dev->n_subdevices; |
| 820 | ++s) { |
| 821 | if (subpriv->dio.intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */ |
| 822 | unsigned long flags; |
| 823 | unsigned oldevents; |
| 824 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 825 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 826 | |
| 827 | oldevents = s->async->events; |
| 828 | |
| 829 | if (subpriv->dio.intr.active) { |
| 830 | unsigned mytrig = |
| 831 | ((triggered >> |
| 832 | subpriv-> |
| 833 | dio. |
| 834 | intr. |
| 835 | asic_chan) |
| 836 | & ((0x1 << subpriv->dio.intr.num_asic_chans) - 1)) << subpriv->dio.intr.first_chan; |
| 837 | if (mytrig & subpriv-> |
| 838 | dio.intr. |
| 839 | enabled_mask) { |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 840 | unsigned int val = |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 841 | 0; |
| 842 | unsigned int n, |
| 843 | ch, len; |
| 844 | |
| 845 | len = s->async-> |
| 846 | cmd. |
| 847 | chanlist_len; |
| 848 | for (n = 0; |
| 849 | n < len; |
| 850 | n++) { |
| 851 | ch = CR_CHAN(s->async->cmd.chanlist[n]); |
| 852 | if (mytrig & (1U << ch)) { |
| 853 | val |= (1U << n); |
| 854 | } |
| 855 | } |
| 856 | /* Write the scan to the buffer. */ |
Bill Pemberton | 9b9bcba | 2009-04-23 15:54:53 -0400 | [diff] [blame] | 857 | if (comedi_buf_put(s->async, ((short *) &val)[0]) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 858 | && |
| 859 | comedi_buf_put |
Bill Pemberton | 9b9bcba | 2009-04-23 15:54:53 -0400 | [diff] [blame] | 860 | (s->async, ((short *) &val)[1])) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 861 | s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS); |
| 862 | } else { |
| 863 | /* Overflow! Stop acquisition!! */ |
| 864 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 865 | pcmmio_stop_intr |
| 866 | (dev, |
| 867 | s); |
| 868 | } |
| 869 | |
| 870 | /* Check for end of acquisition. */ |
| 871 | if (!subpriv-> |
| 872 | dio. |
| 873 | intr. |
| 874 | continuous) |
| 875 | { |
| 876 | /* stop_src == TRIG_COUNT */ |
| 877 | if (subpriv->dio.intr.stop_count > 0) { |
| 878 | subpriv-> |
| 879 | dio. |
| 880 | intr. |
| 881 | stop_count--; |
| 882 | if (subpriv->dio.intr.stop_count == 0) { |
| 883 | s->async->events |= COMEDI_CB_EOA; |
| 884 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 885 | pcmmio_stop_intr |
| 886 | (dev, |
| 887 | s); |
| 888 | } |
| 889 | } |
| 890 | } |
| 891 | } |
| 892 | } |
| 893 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 894 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 895 | |
| 896 | if (oldevents != |
| 897 | s->async->events) { |
| 898 | comedi_event(dev, s); |
| 899 | } |
| 900 | |
| 901 | } |
| 902 | |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | } |
| 907 | } |
| 908 | if (!got1) |
| 909 | return IRQ_NONE; /* interrupt from other source */ |
| 910 | return IRQ_HANDLED; |
| 911 | } |
| 912 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 913 | static void pcmmio_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 914 | { |
| 915 | int nports, firstport, asic, port; |
| 916 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 917 | asic = subpriv->dio.intr.asic; |
| 918 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 919 | return; /* not an interrupt subdev */ |
| 920 | |
| 921 | subpriv->dio.intr.enabled_mask = 0; |
| 922 | subpriv->dio.intr.active = 0; |
| 923 | s->async->inttrig = 0; |
| 924 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 925 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 926 | switch_page(dev, asic, PAGE_ENAB); |
| 927 | for (port = firstport; port < firstport + nports; ++port) { |
| 928 | /* disable all intrs for this subdev.. */ |
| 929 | outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port); |
| 930 | } |
| 931 | } |
| 932 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 933 | static int pcmmio_start_intr(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 934 | { |
| 935 | if (!subpriv->dio.intr.continuous && subpriv->dio.intr.stop_count == 0) { |
| 936 | /* An empty acquisition! */ |
| 937 | s->async->events |= COMEDI_CB_EOA; |
| 938 | subpriv->dio.intr.active = 0; |
| 939 | return 1; |
| 940 | } else { |
| 941 | unsigned bits = 0, pol_bits = 0, n; |
| 942 | int nports, firstport, asic, port; |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 943 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 944 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 945 | asic = subpriv->dio.intr.asic; |
| 946 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 947 | return 1; /* not an interrupt |
| 948 | subdev */ |
| 949 | subpriv->dio.intr.enabled_mask = 0; |
| 950 | subpriv->dio.intr.active = 1; |
| 951 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 952 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 953 | if (cmd->chanlist) { |
| 954 | for (n = 0; n < cmd->chanlist_len; n++) { |
| 955 | bits |= (1U << CR_CHAN(cmd->chanlist[n])); |
| 956 | pol_bits |= (CR_AREF(cmd->chanlist[n]) |
| 957 | || CR_RANGE(cmd->chanlist[n]) ? 1U : 0U) |
| 958 | << CR_CHAN(cmd->chanlist[n]); |
| 959 | } |
| 960 | } |
| 961 | bits &= ((0x1 << subpriv->dio.intr.num_asic_chans) - |
| 962 | 1) << subpriv->dio.intr.first_chan; |
| 963 | subpriv->dio.intr.enabled_mask = bits; |
| 964 | |
| 965 | { /* the below code configures the board to use a specific IRQ from 0-15. */ |
| 966 | unsigned char b; |
| 967 | /* set resource enable register to enable IRQ operation */ |
| 968 | outb(1 << 4, dev->iobase + 3); |
| 969 | /* set bits 0-3 of b to the irq number from 0-15 */ |
| 970 | b = dev->irq & ((1 << 4) - 1); |
| 971 | outb(b, dev->iobase + 2); |
| 972 | /* done, we told the board what irq to use */ |
| 973 | } |
| 974 | |
| 975 | switch_page(dev, asic, PAGE_ENAB); |
| 976 | for (port = firstport; port < firstport + nports; ++port) { |
| 977 | unsigned enab = |
| 978 | bits >> (subpriv->dio.intr.first_chan + (port - |
| 979 | firstport) * 8) & 0xff, pol = |
| 980 | pol_bits >> (subpriv->dio.intr.first_chan + |
| 981 | (port - firstport) * 8) & 0xff; |
| 982 | /* set enab intrs for this subdev.. */ |
| 983 | outb(enab, |
| 984 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
| 985 | switch_page(dev, asic, PAGE_POL); |
| 986 | outb(pol, |
| 987 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
| 988 | } |
| 989 | } |
| 990 | return 0; |
| 991 | } |
| 992 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 993 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 994 | { |
| 995 | unsigned long flags; |
| 996 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 997 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 998 | if (subpriv->dio.intr.active) |
| 999 | pcmmio_stop_intr(dev, s); |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1000 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1001 | |
| 1002 | return 0; |
| 1003 | } |
| 1004 | |
| 1005 | /* |
| 1006 | * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice. |
| 1007 | */ |
| 1008 | static int |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1009 | pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1010 | unsigned int trignum) |
| 1011 | { |
| 1012 | unsigned long flags; |
| 1013 | int event = 0; |
| 1014 | |
| 1015 | if (trignum != 0) |
| 1016 | return -EINVAL; |
| 1017 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1018 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1019 | s->async->inttrig = 0; |
| 1020 | if (subpriv->dio.intr.active) { |
| 1021 | event = pcmmio_start_intr(dev, s); |
| 1022 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1023 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1024 | |
| 1025 | if (event) { |
| 1026 | comedi_event(dev, s); |
| 1027 | } |
| 1028 | |
| 1029 | return 1; |
| 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * 'do_cmd' function for an 'INTERRUPT' subdevice. |
| 1034 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1035 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1036 | { |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 1037 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1038 | unsigned long flags; |
| 1039 | int event = 0; |
| 1040 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1041 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1042 | subpriv->dio.intr.active = 1; |
| 1043 | |
| 1044 | /* Set up end of acquisition. */ |
| 1045 | switch (cmd->stop_src) { |
| 1046 | case TRIG_COUNT: |
| 1047 | subpriv->dio.intr.continuous = 0; |
| 1048 | subpriv->dio.intr.stop_count = cmd->stop_arg; |
| 1049 | break; |
| 1050 | default: |
| 1051 | /* TRIG_NONE */ |
| 1052 | subpriv->dio.intr.continuous = 1; |
| 1053 | subpriv->dio.intr.stop_count = 0; |
| 1054 | break; |
| 1055 | } |
| 1056 | |
| 1057 | /* Set up start of acquisition. */ |
| 1058 | switch (cmd->start_src) { |
| 1059 | case TRIG_INT: |
| 1060 | s->async->inttrig = pcmmio_inttrig_start_intr; |
| 1061 | break; |
| 1062 | default: |
| 1063 | /* TRIG_NOW */ |
| 1064 | event = pcmmio_start_intr(dev, s); |
| 1065 | break; |
| 1066 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1067 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1068 | |
| 1069 | if (event) { |
| 1070 | comedi_event(dev, s); |
| 1071 | } |
| 1072 | |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
| 1076 | /* |
| 1077 | * 'do_cmdtest' function for an 'INTERRUPT' subdevice. |
| 1078 | */ |
| 1079 | static int |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1080 | pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1081 | { |
| 1082 | int err = 0; |
| 1083 | unsigned int tmp; |
| 1084 | |
| 1085 | /* step 1: make sure trigger sources are trivially valid */ |
| 1086 | |
| 1087 | tmp = cmd->start_src; |
| 1088 | cmd->start_src &= (TRIG_NOW | TRIG_INT); |
| 1089 | if (!cmd->start_src || tmp != cmd->start_src) |
| 1090 | err++; |
| 1091 | |
| 1092 | tmp = cmd->scan_begin_src; |
| 1093 | cmd->scan_begin_src &= TRIG_EXT; |
| 1094 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) |
| 1095 | err++; |
| 1096 | |
| 1097 | tmp = cmd->convert_src; |
| 1098 | cmd->convert_src &= TRIG_NOW; |
| 1099 | if (!cmd->convert_src || tmp != cmd->convert_src) |
| 1100 | err++; |
| 1101 | |
| 1102 | tmp = cmd->scan_end_src; |
| 1103 | cmd->scan_end_src &= TRIG_COUNT; |
| 1104 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) |
| 1105 | err++; |
| 1106 | |
| 1107 | tmp = cmd->stop_src; |
| 1108 | cmd->stop_src &= (TRIG_COUNT | TRIG_NONE); |
| 1109 | if (!cmd->stop_src || tmp != cmd->stop_src) |
| 1110 | err++; |
| 1111 | |
| 1112 | if (err) |
| 1113 | return 1; |
| 1114 | |
| 1115 | /* step 2: make sure trigger sources are unique and mutually compatible */ |
| 1116 | |
| 1117 | /* these tests are true if more than one _src bit is set */ |
| 1118 | if ((cmd->start_src & (cmd->start_src - 1)) != 0) |
| 1119 | err++; |
| 1120 | if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0) |
| 1121 | err++; |
| 1122 | if ((cmd->convert_src & (cmd->convert_src - 1)) != 0) |
| 1123 | err++; |
| 1124 | if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0) |
| 1125 | err++; |
| 1126 | if ((cmd->stop_src & (cmd->stop_src - 1)) != 0) |
| 1127 | err++; |
| 1128 | |
| 1129 | if (err) |
| 1130 | return 2; |
| 1131 | |
| 1132 | /* step 3: make sure arguments are trivially compatible */ |
| 1133 | |
| 1134 | /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */ |
| 1135 | if (cmd->start_arg != 0) { |
| 1136 | cmd->start_arg = 0; |
| 1137 | err++; |
| 1138 | } |
| 1139 | |
| 1140 | /* cmd->scan_begin_src == TRIG_EXT */ |
| 1141 | if (cmd->scan_begin_arg != 0) { |
| 1142 | cmd->scan_begin_arg = 0; |
| 1143 | err++; |
| 1144 | } |
| 1145 | |
| 1146 | /* cmd->convert_src == TRIG_NOW */ |
| 1147 | if (cmd->convert_arg != 0) { |
| 1148 | cmd->convert_arg = 0; |
| 1149 | err++; |
| 1150 | } |
| 1151 | |
| 1152 | /* cmd->scan_end_src == TRIG_COUNT */ |
| 1153 | if (cmd->scan_end_arg != cmd->chanlist_len) { |
| 1154 | cmd->scan_end_arg = cmd->chanlist_len; |
| 1155 | err++; |
| 1156 | } |
| 1157 | |
| 1158 | switch (cmd->stop_src) { |
| 1159 | case TRIG_COUNT: |
| 1160 | /* any count allowed */ |
| 1161 | break; |
| 1162 | case TRIG_NONE: |
| 1163 | if (cmd->stop_arg != 0) { |
| 1164 | cmd->stop_arg = 0; |
| 1165 | err++; |
| 1166 | } |
| 1167 | break; |
| 1168 | default: |
| 1169 | break; |
| 1170 | } |
| 1171 | |
| 1172 | if (err) |
| 1173 | return 3; |
| 1174 | |
| 1175 | /* step 4: fix up any arguments */ |
| 1176 | |
| 1177 | /* if (err) return 4; */ |
| 1178 | |
| 1179 | return 0; |
| 1180 | } |
| 1181 | |
| 1182 | static int adc_wait_ready(unsigned long iobase) |
| 1183 | { |
| 1184 | unsigned long retry = 100000; |
| 1185 | while (retry--) |
| 1186 | if (inb(iobase + 3) & 0x80) |
| 1187 | return 0; |
| 1188 | return 1; |
| 1189 | } |
| 1190 | |
| 1191 | /* All this is for AI and AO */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1192 | static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
| 1193 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1194 | { |
| 1195 | int n; |
| 1196 | unsigned long iobase = subpriv->iobase; |
| 1197 | |
| 1198 | /* |
| 1199 | 1. write the CMD byte (to BASE+2) |
| 1200 | 2. read junk lo byte (BASE+0) |
| 1201 | 3. read junk hi byte (BASE+1) |
| 1202 | 4. (mux settled so) write CMD byte again (BASE+2) |
| 1203 | 5. read valid lo byte(BASE+0) |
| 1204 | 6. read valid hi byte(BASE+1) |
| 1205 | |
| 1206 | Additionally note that the BASE += 4 if the channel >= 8 |
| 1207 | */ |
| 1208 | |
| 1209 | /* convert n samples */ |
| 1210 | for (n = 0; n < insn->n; n++) { |
| 1211 | unsigned chan = CR_CHAN(insn->chanspec), range = |
| 1212 | CR_RANGE(insn->chanspec), aref = |
| 1213 | CR_AREF(insn->chanspec); |
| 1214 | unsigned char command_byte = 0; |
| 1215 | unsigned iooffset = 0; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 1216 | short sample, adc_adjust = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1217 | |
| 1218 | if (chan > 7) |
| 1219 | chan -= 8, iooffset = 4; /* use the second dword for channels > 7 */ |
| 1220 | |
| 1221 | if (aref != AREF_DIFF) { |
| 1222 | aref = AREF_GROUND; |
| 1223 | command_byte |= 1 << 7; /* set bit 7 to indicate single-ended */ |
| 1224 | } |
| 1225 | if (range < 2) |
| 1226 | adc_adjust = 0x8000; /* bipolar ranges (-5,5 .. -10,10 need to be adjusted -- that is.. they need to wrap around by adding 0x8000 */ |
| 1227 | |
| 1228 | if (chan % 2) { |
| 1229 | command_byte |= 1 << 6; /* odd-numbered channels have bit 6 set */ |
| 1230 | } |
| 1231 | |
| 1232 | /* select the channel, bits 4-5 == chan/2 */ |
| 1233 | command_byte |= ((chan / 2) & 0x3) << 4; |
| 1234 | |
| 1235 | /* set the range, bits 2-3 */ |
| 1236 | command_byte |= (range & 0x3) << 2; |
| 1237 | |
| 1238 | /* need to do this twice to make sure mux settled */ |
| 1239 | outb(command_byte, iobase + iooffset + 2); /* chan/range/aref select */ |
| 1240 | |
| 1241 | adc_wait_ready(iobase + iooffset); /* wait for the adc to say it finised the conversion */ |
| 1242 | |
| 1243 | outb(command_byte, iobase + iooffset + 2); /* select the chan/range/aref AGAIN */ |
| 1244 | |
| 1245 | adc_wait_ready(iobase + iooffset); |
| 1246 | |
| 1247 | sample = inb(iobase + iooffset + 0); /* read data lo byte */ |
| 1248 | sample |= inb(iobase + iooffset + 1) << 8; /* read data hi byte */ |
| 1249 | sample += adc_adjust; /* adjustment .. munge data */ |
| 1250 | data[n] = sample; |
| 1251 | } |
| 1252 | /* return the number of samples read/written */ |
| 1253 | return n; |
| 1254 | } |
| 1255 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1256 | static int ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
| 1257 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1258 | { |
| 1259 | int n; |
| 1260 | for (n = 0; n < insn->n; n++) { |
| 1261 | unsigned chan = CR_CHAN(insn->chanspec); |
| 1262 | if (chan < s->n_chan) |
| 1263 | data[n] = subpriv->ao.shadow_samples[chan]; |
| 1264 | } |
| 1265 | return n; |
| 1266 | } |
| 1267 | |
| 1268 | static int wait_dac_ready(unsigned long iobase) |
| 1269 | { |
| 1270 | unsigned long retry = 100000L; |
| 1271 | |
| 1272 | /* This may seem like an absurd way to handle waiting and violates the |
| 1273 | "no busy waiting" policy. The fact is that the hardware is |
| 1274 | normally so fast that we usually only need one time through the loop |
| 1275 | anyway. The longer timeout is for rare occasions and for detecting |
| 1276 | non-existant hardware. */ |
| 1277 | |
| 1278 | while (retry--) { |
| 1279 | if (inb(iobase + 3) & 0x80) |
| 1280 | return 0; |
| 1281 | |
| 1282 | } |
| 1283 | return 1; |
| 1284 | } |
| 1285 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1286 | static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, |
| 1287 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1288 | { |
| 1289 | int n; |
| 1290 | unsigned iobase = subpriv->iobase, iooffset = 0; |
| 1291 | |
| 1292 | for (n = 0; n < insn->n; n++) { |
| 1293 | unsigned chan = CR_CHAN(insn->chanspec), range = |
| 1294 | CR_RANGE(insn->chanspec); |
| 1295 | if (chan < s->n_chan) { |
| 1296 | unsigned char command_byte = 0, range_byte = |
| 1297 | range & ((1 << 4) - 1); |
| 1298 | if (chan >= 4) |
| 1299 | chan -= 4, iooffset += 4; |
| 1300 | /* set the range.. */ |
| 1301 | outb(range_byte, iobase + iooffset + 0); |
| 1302 | outb(0, iobase + iooffset + 1); |
| 1303 | |
| 1304 | /* tell it to begin */ |
| 1305 | command_byte = (chan << 1) | 0x60; |
| 1306 | outb(command_byte, iobase + iooffset + 2); |
| 1307 | |
| 1308 | wait_dac_ready(iobase + iooffset); |
| 1309 | |
| 1310 | outb(data[n] & 0xff, iobase + iooffset + 0); /* low order byte */ |
| 1311 | outb((data[n] >> 8) & 0xff, iobase + iooffset + 1); /* high order byte */ |
| 1312 | command_byte = 0x70 | (chan << 1); /* set bit 4 of command byte to indicate data is loaded and trigger conversion */ |
| 1313 | /* trigger converion */ |
| 1314 | outb(command_byte, iobase + iooffset + 2); |
| 1315 | |
| 1316 | wait_dac_ready(iobase + iooffset); |
| 1317 | |
| 1318 | subpriv->ao.shadow_samples[chan] = data[n]; /* save to shadow register for ao_rinsn */ |
| 1319 | } |
| 1320 | } |
| 1321 | return n; |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * A convenient macro that defines init_module() and cleanup_module(), |
| 1326 | * as necessary. |
| 1327 | */ |
| 1328 | COMEDI_INITCLEANUP(driver); |