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" |
Bill Pemberton | 0b8f754 | 2009-05-14 15:24:29 -0400 | [diff] [blame] | 78 | #include "pcm_common.h" |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 79 | #include <linux/pci.h> /* for PCI devices */ |
| 80 | |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 81 | /* This stuff is all from pcmuio.c -- it refers to the DIO subdevices only */ |
| 82 | #define CHANS_PER_PORT 8 |
| 83 | #define PORTS_PER_ASIC 6 |
| 84 | #define INTR_PORTS_PER_ASIC 3 |
| 85 | #define MAX_CHANS_PER_SUBDEV 24 /* number of channels per comedi subdevice */ |
| 86 | #define PORTS_PER_SUBDEV (MAX_CHANS_PER_SUBDEV/CHANS_PER_PORT) |
| 87 | #define CHANS_PER_ASIC (CHANS_PER_PORT*PORTS_PER_ASIC) |
| 88 | #define INTR_CHANS_PER_ASIC 24 |
| 89 | #define INTR_PORTS_PER_SUBDEV (INTR_CHANS_PER_ASIC/CHANS_PER_PORT) |
| 90 | #define MAX_DIO_CHANS (PORTS_PER_ASIC*1*CHANS_PER_PORT) |
| 91 | #define MAX_ASICS (MAX_DIO_CHANS/CHANS_PER_ASIC) |
| 92 | #define SDEV_NO ((int)(s - dev->subdevices)) |
| 93 | #define CALC_N_DIO_SUBDEVS(nchans) ((nchans)/MAX_CHANS_PER_SUBDEV + (!!((nchans)%MAX_CHANS_PER_SUBDEV)) /*+ (nchans > INTR_CHANS_PER_ASIC ? 2 : 1)*/) |
| 94 | /* IO Memory sizes */ |
| 95 | #define ASIC_IOSIZE (0x0B) |
| 96 | #define PCMMIO48_IOSIZE ASIC_IOSIZE |
| 97 | |
| 98 | /* Some offsets - these are all in the 16byte IO memory offset from |
| 99 | the base address. Note that there is a paging scheme to swap out |
| 100 | offsets 0x8-0xA using the PAGELOCK register. See the table below. |
| 101 | |
| 102 | Register(s) Pages R/W? Description |
| 103 | -------------------------------------------------------------- |
| 104 | REG_PORTx All R/W Read/Write/Configure IO |
| 105 | REG_INT_PENDING All ReadOnly Quickly see which INT_IDx has int. |
| 106 | REG_PAGELOCK All WriteOnly Select a page |
| 107 | REG_POLx Pg. 1 only WriteOnly Select edge-detection polarity |
| 108 | REG_ENABx Pg. 2 only WriteOnly Enable/Disable edge-detect. int. |
| 109 | REG_INT_IDx Pg. 3 only R/W See which ports/bits have ints. |
| 110 | */ |
| 111 | #define REG_PORT0 0x0 |
| 112 | #define REG_PORT1 0x1 |
| 113 | #define REG_PORT2 0x2 |
| 114 | #define REG_PORT3 0x3 |
| 115 | #define REG_PORT4 0x4 |
| 116 | #define REG_PORT5 0x5 |
| 117 | #define REG_INT_PENDING 0x6 |
| 118 | #define REG_PAGELOCK 0x7 /* page selector register, upper 2 bits select a page |
| 119 | and bits 0-5 are used to 'lock down' a particular |
| 120 | port above to make it readonly. */ |
| 121 | #define REG_POL0 0x8 |
| 122 | #define REG_POL1 0x9 |
| 123 | #define REG_POL2 0xA |
| 124 | #define REG_ENAB0 0x8 |
| 125 | #define REG_ENAB1 0x9 |
| 126 | #define REG_ENAB2 0xA |
| 127 | #define REG_INT_ID0 0x8 |
| 128 | #define REG_INT_ID1 0x9 |
| 129 | #define REG_INT_ID2 0xA |
| 130 | |
| 131 | #define NUM_PAGED_REGS 3 |
| 132 | #define NUM_PAGES 4 |
| 133 | #define FIRST_PAGED_REG 0x8 |
| 134 | #define REG_PAGE_BITOFFSET 6 |
| 135 | #define REG_LOCK_BITOFFSET 0 |
| 136 | #define REG_PAGE_MASK (~((0x1<<REG_PAGE_BITOFFSET)-1)) |
| 137 | #define REG_LOCK_MASK ~(REG_PAGE_MASK) |
| 138 | #define PAGE_POL 1 |
| 139 | #define PAGE_ENAB 2 |
| 140 | #define PAGE_INT_ID 3 |
| 141 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 142 | typedef int (*comedi_insn_fn_t) (struct comedi_device *, |
| 143 | struct comedi_subdevice *, |
| 144 | struct comedi_insn *, unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 145 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 146 | static int ai_rinsn(struct comedi_device *, struct comedi_subdevice *, |
| 147 | struct comedi_insn *, unsigned int *); |
| 148 | static int ao_rinsn(struct comedi_device *, struct comedi_subdevice *, |
| 149 | struct comedi_insn *, unsigned int *); |
| 150 | static int ao_winsn(struct comedi_device *, struct comedi_subdevice *, |
| 151 | struct comedi_insn *, unsigned int *); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 152 | |
| 153 | /* |
| 154 | * Board descriptions for two imaginary boards. Describing the |
| 155 | * boards in this way is optional, and completely driver-dependent. |
| 156 | * Some drivers use arrays such as this, other do not. |
| 157 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 158 | struct pcmmio_board { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 159 | const char *name; |
| 160 | const int dio_num_asics; |
| 161 | const int dio_num_ports; |
| 162 | const int total_iosize; |
| 163 | const int ai_bits; |
| 164 | const int ao_bits; |
| 165 | const int n_ai_chans; |
| 166 | const int n_ao_chans; |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 167 | const struct comedi_lrange *ai_range_table, *ao_range_table; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 168 | comedi_insn_fn_t ai_rinsn, ao_rinsn, ao_winsn; |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 169 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 170 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 171 | static const struct comedi_lrange ranges_ai = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 172 | { 4, {RANGE(-5., 5.), RANGE(-10., 10.), RANGE(0., 5.), RANGE(0., |
| 173 | 10.)} |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 174 | }; |
| 175 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 176 | static const struct comedi_lrange ranges_ao = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 177 | { 6, {RANGE(0., 5.), RANGE(0., 10.), RANGE(-5., 5.), RANGE(-10., 10.), |
| 178 | RANGE(-2.5, 2.5), RANGE(-2.5, 7.5)} |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 179 | }; |
| 180 | |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 181 | static const struct pcmmio_board pcmmio_boards[] = { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 182 | { |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 183 | .name = "pcmmio", |
| 184 | .dio_num_asics = 1, |
| 185 | .dio_num_ports = 6, |
| 186 | .total_iosize = 32, |
| 187 | .ai_bits = 16, |
| 188 | .ao_bits = 16, |
| 189 | .n_ai_chans = 16, |
| 190 | .n_ao_chans = 8, |
| 191 | .ai_range_table = &ranges_ai, |
| 192 | .ao_range_table = &ranges_ao, |
| 193 | .ai_rinsn = ai_rinsn, |
| 194 | .ao_rinsn = ao_rinsn, |
| 195 | .ao_winsn = ao_winsn}, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 196 | }; |
| 197 | |
| 198 | /* |
| 199 | * Useful for shorthand access to the particular board structure |
| 200 | */ |
Bill Pemberton | 657f81e | 2009-03-16 22:19:04 -0400 | [diff] [blame] | 201 | #define thisboard ((const struct pcmmio_board *)dev->board_ptr) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 202 | |
| 203 | /* this structure is for data unique to this subdevice. */ |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 204 | struct pcmmio_subdev_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 205 | |
| 206 | union { |
| 207 | /* for DIO: mapping of halfwords (bytes) in port/chanarray to iobase */ |
| 208 | unsigned long iobases[PORTS_PER_SUBDEV]; |
| 209 | |
| 210 | /* for AI/AO */ |
| 211 | unsigned long iobase; |
| 212 | }; |
| 213 | union { |
| 214 | struct { |
| 215 | |
| 216 | /* The below is only used for intr subdevices */ |
| 217 | struct { |
| 218 | int asic; /* if non-negative, this subdev has an interrupt asic */ |
| 219 | int first_chan; /* if nonnegative, the first channel id for |
| 220 | interrupts. */ |
| 221 | int num_asic_chans; /* the number of asic channels in this subdev |
| 222 | that have interrutps */ |
| 223 | int asic_chan; /* if nonnegative, the first channel id with |
| 224 | respect to the asic that has interrupts */ |
| 225 | int enabled_mask; /* subdev-relative channel mask for channels |
| 226 | we are interested in */ |
| 227 | int active; |
| 228 | int stop_count; |
| 229 | int continuous; |
| 230 | spinlock_t spinlock; |
| 231 | } intr; |
| 232 | } dio; |
| 233 | struct { |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 234 | unsigned int shadow_samples[8]; /* the last unsigned int data written */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 235 | } ao; |
| 236 | }; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 237 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 238 | |
| 239 | /* this structure is for data unique to this hardware driver. If |
| 240 | several hardware drivers keep similar information in this structure, |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 241 | 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] | 242 | struct pcmmio_private { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 243 | /* stuff for DIO */ |
| 244 | struct { |
| 245 | unsigned char pagelock; /* current page and lock */ |
| 246 | unsigned char pol[NUM_PAGED_REGS]; /* shadow of POLx registers */ |
| 247 | unsigned char enab[NUM_PAGED_REGS]; /* shadow of ENABx registers */ |
| 248 | int num; |
| 249 | unsigned long iobase; |
| 250 | unsigned int irq; |
| 251 | spinlock_t spinlock; |
| 252 | } asics[MAX_ASICS]; |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 253 | struct pcmmio_subdev_private *sprivs; |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 254 | }; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 255 | |
| 256 | /* |
| 257 | * most drivers define the following macro to make it easy to |
| 258 | * access the private structure. |
| 259 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 260 | #define devpriv ((struct pcmmio_private *)dev->private) |
Bill Pemberton | 4467df9 | 2009-03-16 22:19:37 -0400 | [diff] [blame] | 261 | #define subpriv ((struct pcmmio_subdev_private *)s->private) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 262 | /* |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 263 | * The struct comedi_driver structure tells the Comedi core module |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 264 | * which functions to call to configure/deconfigure (attach/detach) |
| 265 | * the board, and also about the kernel module that contains |
| 266 | * the device code. |
| 267 | */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 268 | static int pcmmio_attach(struct comedi_device *dev, |
| 269 | struct comedi_devconfig *it); |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 270 | static int pcmmio_detach(struct comedi_device *dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 271 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 272 | static struct comedi_driver driver = { |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 273 | .driver_name = "pcmmio", |
| 274 | .module = THIS_MODULE, |
| 275 | .attach = pcmmio_attach, |
| 276 | .detach = pcmmio_detach, |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 277 | /* It is not necessary to implement the following members if you are |
| 278 | * writing a driver for a ISA PnP or PCI card */ |
| 279 | /* Most drivers will support multiple types of boards by |
| 280 | * having an array of board structures. These were defined |
| 281 | * in pcmmio_boards[] above. Note that the element 'name' |
| 282 | * was first in the structure -- Comedi uses this fact to |
| 283 | * extract the name of the board without knowing any details |
| 284 | * about the structure except for its length. |
| 285 | * When a device is attached (by comedi_config), the name |
| 286 | * of the device is given to Comedi, and Comedi tries to |
| 287 | * match it by going through the list of board names. If |
| 288 | * there is a match, the address of the pointer is put |
| 289 | * into dev->board_ptr and driver->attach() is called. |
| 290 | * |
| 291 | * Note that these are not necessary if you can determine |
| 292 | * the type of board in software. ISA PnP, PCI, and PCMCIA |
| 293 | * devices are such boards. |
| 294 | */ |
Bill Pemberton | 68c3dbf | 2009-04-22 21:11:49 -0400 | [diff] [blame] | 295 | .board_name = &pcmmio_boards[0].name, |
| 296 | .offset = sizeof(struct pcmmio_board), |
Bill Pemberton | 8629efa | 2009-04-23 15:54:56 -0400 | [diff] [blame] | 297 | .num_names = ARRAY_SIZE(pcmmio_boards), |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 298 | }; |
| 299 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 300 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, |
| 301 | struct comedi_subdevice *s, |
| 302 | struct comedi_insn *insn, unsigned int *data); |
| 303 | static int pcmmio_dio_insn_config(struct comedi_device *dev, |
| 304 | struct comedi_subdevice *s, |
| 305 | struct comedi_insn *insn, unsigned int *data); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 306 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 307 | static irqreturn_t interrupt_pcmmio(int irq, void *d); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 308 | static void pcmmio_stop_intr(struct comedi_device *, struct comedi_subdevice *); |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 309 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s); |
| 310 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s); |
| 311 | static int pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 312 | struct comedi_cmd *cmd); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 313 | |
| 314 | /* some helper functions to deal with specifics of this device's registers */ |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 315 | static void init_asics(struct comedi_device *dev); /* sets up/clears ASIC chips to defaults */ |
| 316 | static void switch_page(struct comedi_device *dev, int asic, int page); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 317 | #ifdef notused |
Bill Pemberton | 814900c | 2009-04-23 15:54:54 -0400 | [diff] [blame] | 318 | static void lock_port(struct comedi_device *dev, int asic, int port); |
| 319 | static void unlock_port(struct comedi_device *dev, int asic, int port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 320 | #endif |
| 321 | |
| 322 | /* |
| 323 | * Attach is called by the Comedi core to configure the driver |
| 324 | * for a particular board. If you specified a board_name array |
| 325 | * in the driver structure, dev->board_ptr contains that |
| 326 | * address. |
| 327 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 328 | static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 329 | { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 330 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 331 | int sdev_no, chans_left, n_dio_subdevs, n_subdevs, port, asic, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 332 | thisasic_chanct = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 333 | unsigned long iobase; |
| 334 | unsigned int irq[MAX_ASICS]; |
| 335 | |
| 336 | iobase = it->options[0]; |
| 337 | irq[0] = it->options[1]; |
| 338 | |
| 339 | printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 340 | iobase); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 341 | |
| 342 | dev->iobase = iobase; |
| 343 | |
| 344 | if (!iobase || !request_region(iobase, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 345 | thisboard->total_iosize, |
| 346 | driver.driver_name)) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 347 | printk("I/O port conflict\n"); |
| 348 | return -EIO; |
| 349 | } |
| 350 | |
| 351 | /* |
| 352 | * Initialize dev->board_name. Note that we can use the "thisboard" |
| 353 | * macro now, since we just initialized it in the last line. |
| 354 | */ |
| 355 | dev->board_name = thisboard->name; |
| 356 | |
| 357 | /* |
| 358 | * Allocate the private structure area. alloc_private() is a |
| 359 | * convenient macro defined in comedidev.h. |
| 360 | */ |
Bill Pemberton | e56ab71 | 2009-03-16 22:20:30 -0400 | [diff] [blame] | 361 | if (alloc_private(dev, sizeof(struct pcmmio_private)) < 0) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 362 | printk("cannot allocate private data structure\n"); |
| 363 | return -ENOMEM; |
| 364 | } |
| 365 | |
| 366 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 367 | devpriv->asics[asic].num = asic; |
| 368 | devpriv->asics[asic].iobase = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 369 | dev->iobase + 16 + asic * ASIC_IOSIZE; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 370 | devpriv->asics[asic].irq = 0; /* this gets actually set at the end of |
| 371 | this function when we |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 372 | request_irqs */ |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 373 | spin_lock_init(&devpriv->asics[asic].spinlock); |
| 374 | } |
| 375 | |
| 376 | chans_left = CHANS_PER_ASIC * thisboard->dio_num_asics; |
| 377 | n_dio_subdevs = CALC_N_DIO_SUBDEVS(chans_left); |
| 378 | n_subdevs = n_dio_subdevs + 2; |
| 379 | devpriv->sprivs = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 380 | kcalloc(n_subdevs, sizeof(struct pcmmio_subdev_private), |
| 381 | GFP_KERNEL); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 382 | if (!devpriv->sprivs) { |
| 383 | printk("cannot allocate subdevice private data structures\n"); |
| 384 | return -ENOMEM; |
| 385 | } |
| 386 | /* |
| 387 | * Allocate the subdevice structures. alloc_subdevice() is a |
| 388 | * convenient macro defined in comedidev.h. |
| 389 | * |
| 390 | * Allocate 1 AI + 1 AO + 2 DIO subdevs (24 lines per DIO) |
| 391 | */ |
| 392 | if (alloc_subdevices(dev, n_subdevs) < 0) { |
| 393 | printk("cannot allocate subdevice data structures\n"); |
| 394 | return -ENOMEM; |
| 395 | } |
| 396 | |
| 397 | /* First, AI */ |
| 398 | sdev_no = 0; |
| 399 | s = dev->subdevices + sdev_no; |
| 400 | s->private = devpriv->sprivs + sdev_no; |
| 401 | s->maxdata = (1 << thisboard->ai_bits) - 1; |
| 402 | s->range_table = thisboard->ai_range_table; |
| 403 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; |
| 404 | s->type = COMEDI_SUBD_AI; |
| 405 | s->n_chan = thisboard->n_ai_chans; |
| 406 | s->len_chanlist = s->n_chan; |
| 407 | s->insn_read = thisboard->ai_rinsn; |
| 408 | subpriv->iobase = dev->iobase + 0; |
| 409 | /* initialize the resource enable register by clearing it */ |
| 410 | outb(0, subpriv->iobase + 3); |
| 411 | outb(0, subpriv->iobase + 4 + 3); |
| 412 | |
| 413 | /* Next, AO */ |
| 414 | ++sdev_no; |
| 415 | s = dev->subdevices + sdev_no; |
| 416 | s->private = devpriv->sprivs + sdev_no; |
| 417 | s->maxdata = (1 << thisboard->ao_bits) - 1; |
| 418 | s->range_table = thisboard->ao_range_table; |
| 419 | s->subdev_flags = SDF_READABLE; |
| 420 | s->type = COMEDI_SUBD_AO; |
| 421 | s->n_chan = thisboard->n_ao_chans; |
| 422 | s->len_chanlist = s->n_chan; |
| 423 | s->insn_read = thisboard->ao_rinsn; |
| 424 | s->insn_write = thisboard->ao_winsn; |
| 425 | subpriv->iobase = dev->iobase + 8; |
| 426 | /* initialize the resource enable register by clearing it */ |
| 427 | outb(0, subpriv->iobase + 3); |
| 428 | outb(0, subpriv->iobase + 4 + 3); |
| 429 | |
| 430 | ++sdev_no; |
| 431 | port = 0; |
| 432 | asic = 0; |
| 433 | for (; sdev_no < (int)dev->n_subdevices; ++sdev_no) { |
| 434 | int byte_no; |
| 435 | |
| 436 | s = dev->subdevices + sdev_no; |
| 437 | s->private = devpriv->sprivs + sdev_no; |
| 438 | s->maxdata = 1; |
| 439 | s->range_table = &range_digital; |
| 440 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
| 441 | s->type = COMEDI_SUBD_DIO; |
| 442 | s->insn_bits = pcmmio_dio_insn_bits; |
| 443 | s->insn_config = pcmmio_dio_insn_config; |
Bill Pemberton | 214e7b5 | 2009-05-14 15:24:28 -0400 | [diff] [blame] | 444 | s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 445 | subpriv->dio.intr.asic = -1; |
| 446 | subpriv->dio.intr.first_chan = -1; |
| 447 | subpriv->dio.intr.asic_chan = -1; |
| 448 | subpriv->dio.intr.num_asic_chans = -1; |
| 449 | subpriv->dio.intr.active = 0; |
| 450 | s->len_chanlist = 1; |
| 451 | |
| 452 | /* save the ioport address for each 'port' of 8 channels in the |
| 453 | subdevice */ |
| 454 | for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) { |
| 455 | if (port >= PORTS_PER_ASIC) { |
| 456 | port = 0; |
| 457 | ++asic; |
| 458 | thisasic_chanct = 0; |
| 459 | } |
| 460 | subpriv->iobases[byte_no] = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 461 | devpriv->asics[asic].iobase + port; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 462 | |
| 463 | if (thisasic_chanct < |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 464 | CHANS_PER_PORT * INTR_PORTS_PER_ASIC |
| 465 | && subpriv->dio.intr.asic < 0) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 466 | /* this is an interrupt subdevice, so setup the struct */ |
| 467 | subpriv->dio.intr.asic = asic; |
| 468 | subpriv->dio.intr.active = 0; |
| 469 | subpriv->dio.intr.stop_count = 0; |
| 470 | subpriv->dio.intr.first_chan = byte_no * 8; |
| 471 | subpriv->dio.intr.asic_chan = thisasic_chanct; |
| 472 | subpriv->dio.intr.num_asic_chans = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 473 | s->n_chan - subpriv->dio.intr.first_chan; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 474 | s->cancel = pcmmio_cancel; |
| 475 | s->do_cmd = pcmmio_cmd; |
| 476 | s->do_cmdtest = pcmmio_cmdtest; |
| 477 | s->len_chanlist = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 478 | subpriv->dio.intr.num_asic_chans; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 479 | } |
| 480 | thisasic_chanct += CHANS_PER_PORT; |
| 481 | } |
| 482 | spin_lock_init(&subpriv->dio.intr.spinlock); |
| 483 | |
| 484 | chans_left -= s->n_chan; |
| 485 | |
| 486 | if (!chans_left) { |
| 487 | asic = 0; /* reset the asic to our first asic, to do intr subdevs */ |
| 488 | port = 0; |
| 489 | } |
| 490 | |
| 491 | } |
| 492 | |
| 493 | init_asics(dev); /* clear out all the registers, basically */ |
| 494 | |
| 495 | for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) { |
| 496 | if (irq[asic] |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 497 | && request_irq(irq[asic], interrupt_pcmmio, |
| 498 | IRQF_SHARED, thisboard->name, dev)) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 499 | int i; |
| 500 | /* unroll the allocated irqs.. */ |
| 501 | for (i = asic - 1; i >= 0; --i) { |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 502 | free_irq(irq[i], dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 503 | devpriv->asics[i].irq = irq[i] = 0; |
| 504 | } |
| 505 | irq[asic] = 0; |
| 506 | } |
| 507 | devpriv->asics[asic].irq = irq[asic]; |
| 508 | } |
| 509 | |
| 510 | dev->irq = irq[0]; /* grr.. wish comedi dev struct supported multiple |
| 511 | irqs.. */ |
| 512 | |
| 513 | if (irq[0]) { |
| 514 | printk("irq: %u ", irq[0]); |
| 515 | if (irq[1] && thisboard->dio_num_asics == 2) |
| 516 | printk("second ASIC irq: %u ", irq[1]); |
| 517 | } else { |
| 518 | printk("(IRQ mode disabled) "); |
| 519 | } |
| 520 | |
| 521 | printk("attached\n"); |
| 522 | |
| 523 | return 1; |
| 524 | } |
| 525 | |
| 526 | /* |
| 527 | * _detach is called to deconfigure a device. It should deallocate |
| 528 | * resources. |
| 529 | * This function is also called when _attach() fails, so it should be |
| 530 | * careful not to release resources that were not necessarily |
| 531 | * allocated by _attach(). dev->private and dev->subdevices are |
| 532 | * deallocated automatically by the core. |
| 533 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 534 | static int pcmmio_detach(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 535 | { |
| 536 | int i; |
| 537 | |
| 538 | printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name); |
| 539 | if (dev->iobase) |
| 540 | release_region(dev->iobase, thisboard->total_iosize); |
| 541 | |
| 542 | for (i = 0; i < MAX_ASICS; ++i) { |
| 543 | if (devpriv && devpriv->asics[i].irq) |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 544 | free_irq(devpriv->asics[i].irq, dev); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | if (devpriv && devpriv->sprivs) |
| 548 | kfree(devpriv->sprivs); |
| 549 | |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | /* DIO devices are slightly special. Although it is possible to |
| 554 | * implement the insn_read/insn_write interface, it is much more |
| 555 | * useful to applications if you implement the insn_bits interface. |
| 556 | * This allows packed reading/writing of the DIO channels. The |
| 557 | * comedi core can convert between insn_bits and insn_read/write */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 558 | static int pcmmio_dio_insn_bits(struct comedi_device *dev, |
| 559 | struct comedi_subdevice *s, |
| 560 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 561 | { |
| 562 | int byte_no; |
| 563 | if (insn->n != 2) |
| 564 | return -EINVAL; |
| 565 | |
| 566 | /* NOTE: |
| 567 | reading a 0 means this channel was high |
| 568 | writine a 0 sets the channel high |
| 569 | reading a 1 means this channel was low |
| 570 | writing a 1 means set this channel low |
| 571 | |
| 572 | Therefore everything is always inverted. */ |
| 573 | |
| 574 | /* The insn data is a mask in data[0] and the new data |
| 575 | * in data[1], each channel cooresponding to a bit. */ |
| 576 | |
| 577 | #ifdef DAMMIT_ITS_BROKEN |
| 578 | /* DEBUG */ |
| 579 | printk("write mask: %08x data: %08x\n", data[0], data[1]); |
| 580 | #endif |
| 581 | |
| 582 | s->state = 0; |
| 583 | |
| 584 | for (byte_no = 0; byte_no < s->n_chan / CHANS_PER_PORT; ++byte_no) { |
| 585 | /* address of 8-bit port */ |
| 586 | unsigned long ioaddr = subpriv->iobases[byte_no], |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 587 | /* bit offset of port in 32-bit doubleword */ |
| 588 | offset = byte_no * 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 589 | /* this 8-bit port's data */ |
| 590 | unsigned char byte = 0, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 591 | /* The write mask for this port (if any) */ |
| 592 | write_mask_byte = (data[0] >> offset) & 0xff, |
| 593 | /* The data byte for this port */ |
| 594 | data_byte = (data[1] >> offset) & 0xff; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 595 | |
| 596 | byte = inb(ioaddr); /* read all 8-bits for this port */ |
| 597 | |
| 598 | #ifdef DAMMIT_ITS_BROKEN |
| 599 | /* DEBUG */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 600 | printk |
| 601 | ("byte %d wmb %02x db %02x offset %02d io %04x, data_in %02x ", |
| 602 | byte_no, (unsigned)write_mask_byte, (unsigned)data_byte, |
| 603 | offset, ioaddr, (unsigned)byte); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 604 | #endif |
| 605 | |
| 606 | if (write_mask_byte) { |
| 607 | /* this byte has some write_bits -- so set the output lines */ |
| 608 | byte &= ~write_mask_byte; /* clear bits for write mask */ |
| 609 | byte |= ~data_byte & write_mask_byte; /* set to inverted data_byte */ |
| 610 | /* Write out the new digital output state */ |
| 611 | outb(byte, ioaddr); |
| 612 | } |
| 613 | #ifdef DAMMIT_ITS_BROKEN |
| 614 | /* DEBUG */ |
| 615 | printk("data_out_byte %02x\n", (unsigned)byte); |
| 616 | #endif |
| 617 | /* save the digital input lines for this byte.. */ |
| 618 | s->state |= ((unsigned int)byte) << offset; |
| 619 | } |
| 620 | |
| 621 | /* now return the DIO lines to data[1] - note they came inverted! */ |
| 622 | data[1] = ~s->state; |
| 623 | |
| 624 | #ifdef DAMMIT_ITS_BROKEN |
| 625 | /* DEBUG */ |
| 626 | printk("s->state %08x data_out %08x\n", s->state, data[1]); |
| 627 | #endif |
| 628 | |
| 629 | return 2; |
| 630 | } |
| 631 | |
| 632 | /* The input or output configuration of each digital line is |
| 633 | * configured by a special insn_config instruction. chanspec |
| 634 | * contains the channel to be changed, and data[0] contains the |
| 635 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 636 | static int pcmmio_dio_insn_config(struct comedi_device *dev, |
| 637 | struct comedi_subdevice *s, |
| 638 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 639 | { |
| 640 | int chan = CR_CHAN(insn->chanspec), byte_no = chan / 8, bit_no = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 641 | chan % 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 642 | unsigned long ioaddr; |
| 643 | unsigned char byte; |
| 644 | |
| 645 | /* Compute ioaddr for this channel */ |
| 646 | ioaddr = subpriv->iobases[byte_no]; |
| 647 | |
| 648 | /* NOTE: |
| 649 | writing a 0 an IO channel's bit sets the channel to INPUT |
| 650 | and pulls the line high as well |
| 651 | |
| 652 | writing a 1 to an IO channel's bit pulls the line low |
| 653 | |
| 654 | All channels are implicitly always in OUTPUT mode -- but when |
| 655 | they are high they can be considered to be in INPUT mode.. |
| 656 | |
| 657 | Thus, we only force channels low if the config request was INPUT, |
| 658 | otherwise we do nothing to the hardware. */ |
| 659 | |
| 660 | switch (data[0]) { |
| 661 | case INSN_CONFIG_DIO_OUTPUT: |
| 662 | /* save to io_bits -- don't actually do anything since |
| 663 | all input channels are also output channels... */ |
| 664 | s->io_bits |= 1 << chan; |
| 665 | break; |
| 666 | case INSN_CONFIG_DIO_INPUT: |
| 667 | /* write a 0 to the actual register representing the channel |
| 668 | to set it to 'input'. 0 means "float high". */ |
| 669 | byte = inb(ioaddr); |
| 670 | byte &= ~(1 << bit_no); |
| 671 | /**< set input channel to '0' */ |
| 672 | |
| 673 | /* write out byte -- this is the only time we actually affect the |
| 674 | hardware as all channels are implicitly output -- but input |
| 675 | channels are set to float-high */ |
| 676 | outb(byte, ioaddr); |
| 677 | |
| 678 | /* save to io_bits */ |
| 679 | s->io_bits &= ~(1 << chan); |
| 680 | break; |
| 681 | |
| 682 | case INSN_CONFIG_DIO_QUERY: |
| 683 | /* retreive from shadow register */ |
| 684 | data[1] = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 685 | (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 686 | return insn->n; |
| 687 | break; |
| 688 | |
| 689 | default: |
| 690 | return -EINVAL; |
| 691 | break; |
| 692 | } |
| 693 | |
| 694 | return insn->n; |
| 695 | } |
| 696 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 697 | static void init_asics(struct comedi_device *dev) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 698 | { /* sets up an |
| 699 | ASIC chip to defaults */ |
| 700 | int asic; |
| 701 | |
| 702 | for (asic = 0; asic < thisboard->dio_num_asics; ++asic) { |
| 703 | int port, page; |
| 704 | unsigned long baseaddr = devpriv->asics[asic].iobase; |
| 705 | |
| 706 | switch_page(dev, asic, 0); /* switch back to page 0 */ |
| 707 | |
| 708 | /* first, clear all the DIO port bits */ |
| 709 | for (port = 0; port < PORTS_PER_ASIC; ++port) |
| 710 | outb(0, baseaddr + REG_PORT0 + port); |
| 711 | |
| 712 | /* Next, clear all the paged registers for each page */ |
| 713 | for (page = 1; page < NUM_PAGES; ++page) { |
| 714 | int reg; |
| 715 | /* now clear all the paged registers */ |
| 716 | switch_page(dev, asic, page); |
| 717 | for (reg = FIRST_PAGED_REG; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 718 | reg < FIRST_PAGED_REG + NUM_PAGED_REGS; ++reg) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 719 | outb(0, baseaddr + reg); |
| 720 | } |
| 721 | |
| 722 | /* DEBUG set rising edge interrupts on port0 of both asics */ |
| 723 | /*switch_page(dev, asic, PAGE_POL); |
| 724 | outb(0xff, baseaddr + REG_POL0); |
| 725 | switch_page(dev, asic, PAGE_ENAB); |
| 726 | outb(0xff, baseaddr + REG_ENAB0); */ |
| 727 | /* END DEBUG */ |
| 728 | |
| 729 | switch_page(dev, asic, 0); /* switch back to default page 0 */ |
| 730 | |
| 731 | } |
| 732 | } |
| 733 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 734 | static void switch_page(struct comedi_device *dev, int asic, int page) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 735 | { |
| 736 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 737 | return; /* paranoia */ |
| 738 | if (page < 0 || page >= NUM_PAGES) |
| 739 | return; /* more paranoia */ |
| 740 | |
| 741 | devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK; |
| 742 | devpriv->asics[asic].pagelock |= page << REG_PAGE_BITOFFSET; |
| 743 | |
| 744 | /* now write out the shadow register */ |
| 745 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 746 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | #ifdef notused |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 750 | static void lock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 751 | { |
| 752 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 753 | return; /* paranoia */ |
| 754 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 755 | return; /* more paranoia */ |
| 756 | |
| 757 | devpriv->asics[asic].pagelock |= 0x1 << port; |
| 758 | /* now write out the shadow register */ |
| 759 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 760 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 761 | return; |
| 762 | } |
| 763 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 764 | static void unlock_port(struct comedi_device *dev, int asic, int port) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 765 | { |
| 766 | if (asic < 0 || asic >= thisboard->dio_num_asics) |
| 767 | return; /* paranoia */ |
| 768 | if (port < 0 || port >= PORTS_PER_ASIC) |
| 769 | return; /* more paranoia */ |
| 770 | devpriv->asics[asic].pagelock &= ~(0x1 << port) | REG_LOCK_MASK; |
| 771 | /* now write out the shadow register */ |
| 772 | outb(devpriv->asics[asic].pagelock, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 773 | devpriv->asics[asic].iobase + REG_PAGELOCK); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 774 | } |
| 775 | #endif /* notused */ |
| 776 | |
Jiri Slaby | 70265d2 | 2009-03-26 09:34:06 +0100 | [diff] [blame] | 777 | static irqreturn_t interrupt_pcmmio(int irq, void *d) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 778 | { |
| 779 | int asic, got1 = 0; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 780 | struct comedi_device *dev = (struct comedi_device *)d; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 781 | |
| 782 | for (asic = 0; asic < MAX_ASICS; ++asic) { |
| 783 | if (irq == devpriv->asics[asic].irq) { |
| 784 | unsigned long flags; |
| 785 | unsigned triggered = 0; |
| 786 | unsigned long iobase = devpriv->asics[asic].iobase; |
| 787 | /* it is an interrupt for ASIC #asic */ |
| 788 | unsigned char int_pend; |
| 789 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 790 | spin_lock_irqsave(&devpriv->asics[asic].spinlock, |
| 791 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 792 | |
| 793 | int_pend = inb(iobase + REG_INT_PENDING) & 0x07; |
| 794 | |
| 795 | if (int_pend) { |
| 796 | int port; |
| 797 | for (port = 0; port < INTR_PORTS_PER_ASIC; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 798 | ++port) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 799 | if (int_pend & (0x1 << port)) { |
| 800 | unsigned char |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 801 | io_lines_with_edges = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 802 | switch_page(dev, asic, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 803 | PAGE_INT_ID); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 804 | io_lines_with_edges = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 805 | inb(iobase + |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 806 | REG_INT_ID0 + port); |
| 807 | |
| 808 | if (io_lines_with_edges) |
| 809 | /* clear pending interrupt */ |
| 810 | outb(0, iobase + |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 811 | REG_INT_ID0 + |
| 812 | port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 813 | |
| 814 | triggered |= |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 815 | io_lines_with_edges << |
| 816 | port * 8; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 817 | } |
| 818 | } |
| 819 | |
| 820 | ++got1; |
| 821 | } |
| 822 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 823 | spin_unlock_irqrestore(&devpriv->asics[asic].spinlock, |
| 824 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 825 | |
| 826 | if (triggered) { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 827 | struct comedi_subdevice *s; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 828 | /* TODO here: dispatch io lines to subdevs with commands.. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 829 | printk |
| 830 | ("PCMMIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", |
| 831 | irq, asic, triggered); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 832 | for (s = dev->subdevices + 2; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 833 | s < dev->subdevices + dev->n_subdevices; |
| 834 | ++s) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 835 | if (subpriv->dio.intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */ |
| 836 | unsigned long flags; |
| 837 | unsigned oldevents; |
| 838 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 839 | spin_lock_irqsave(&subpriv->dio. |
| 840 | intr.spinlock, |
| 841 | flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 842 | |
| 843 | oldevents = s->async->events; |
| 844 | |
| 845 | if (subpriv->dio.intr.active) { |
| 846 | unsigned mytrig = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 847 | ((triggered >> |
| 848 | subpriv->dio.intr.asic_chan) |
| 849 | & |
| 850 | ((0x1 << subpriv-> |
| 851 | dio.intr. |
| 852 | num_asic_chans) - |
| 853 | 1)) << subpriv-> |
| 854 | dio.intr.first_chan; |
| 855 | if (mytrig & |
| 856 | subpriv->dio. |
| 857 | intr.enabled_mask) { |
| 858 | unsigned int val |
| 859 | = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 860 | unsigned int n, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 861 | ch, len; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 862 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 863 | len = |
| 864 | s-> |
| 865 | async->cmd.chanlist_len; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 866 | for (n = 0; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 867 | n < len; |
| 868 | n++) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 869 | ch = CR_CHAN(s->async->cmd.chanlist[n]); |
| 870 | if (mytrig & (1U << ch)) { |
| 871 | val |= (1U << n); |
| 872 | } |
| 873 | } |
| 874 | /* Write the scan to the buffer. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 875 | if (comedi_buf_put(s->async, ((short *)&val)[0]) |
| 876 | && |
| 877 | comedi_buf_put |
| 878 | (s->async, |
| 879 | ((short *) |
| 880 | &val)[1])) |
| 881 | { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 882 | s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS); |
| 883 | } else { |
| 884 | /* Overflow! Stop acquisition!! */ |
| 885 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 886 | pcmmio_stop_intr |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 887 | (dev, |
| 888 | s); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 889 | } |
| 890 | |
| 891 | /* Check for end of acquisition. */ |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 892 | if (!subpriv->dio.intr.continuous) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 893 | /* stop_src == TRIG_COUNT */ |
| 894 | if (subpriv->dio.intr.stop_count > 0) { |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 895 | subpriv->dio.intr.stop_count--; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 896 | if (subpriv->dio.intr.stop_count == 0) { |
| 897 | s->async->events |= COMEDI_CB_EOA; |
| 898 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ |
| 899 | pcmmio_stop_intr |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 900 | (dev, |
| 901 | s); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 902 | } |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | } |
| 907 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 908 | spin_unlock_irqrestore |
| 909 | (&subpriv->dio.intr. |
| 910 | spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 911 | |
| 912 | if (oldevents != |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 913 | s->async->events) { |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 914 | comedi_event(dev, s); |
| 915 | } |
| 916 | |
| 917 | } |
| 918 | |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | } |
| 923 | } |
| 924 | if (!got1) |
| 925 | return IRQ_NONE; /* interrupt from other source */ |
| 926 | return IRQ_HANDLED; |
| 927 | } |
| 928 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 929 | static void pcmmio_stop_intr(struct comedi_device *dev, |
| 930 | struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 931 | { |
| 932 | int nports, firstport, asic, port; |
| 933 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 934 | asic = subpriv->dio.intr.asic; |
| 935 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 936 | return; /* not an interrupt subdev */ |
| 937 | |
| 938 | subpriv->dio.intr.enabled_mask = 0; |
| 939 | subpriv->dio.intr.active = 0; |
| 940 | s->async->inttrig = 0; |
| 941 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 942 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 943 | switch_page(dev, asic, PAGE_ENAB); |
| 944 | for (port = firstport; port < firstport + nports; ++port) { |
| 945 | /* disable all intrs for this subdev.. */ |
| 946 | outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port); |
| 947 | } |
| 948 | } |
| 949 | |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 950 | static int pcmmio_start_intr(struct comedi_device *dev, |
| 951 | struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 952 | { |
| 953 | if (!subpriv->dio.intr.continuous && subpriv->dio.intr.stop_count == 0) { |
| 954 | /* An empty acquisition! */ |
| 955 | s->async->events |= COMEDI_CB_EOA; |
| 956 | subpriv->dio.intr.active = 0; |
| 957 | return 1; |
| 958 | } else { |
| 959 | unsigned bits = 0, pol_bits = 0, n; |
| 960 | int nports, firstport, asic, port; |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 961 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 962 | |
Bill Pemberton | c374413 | 2009-04-22 21:11:47 -0400 | [diff] [blame] | 963 | asic = subpriv->dio.intr.asic; |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 964 | if (asic < 0) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 965 | return 1; /* not an interrupt |
| 966 | subdev */ |
| 967 | subpriv->dio.intr.enabled_mask = 0; |
| 968 | subpriv->dio.intr.active = 1; |
| 969 | nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT; |
| 970 | firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT; |
| 971 | if (cmd->chanlist) { |
| 972 | for (n = 0; n < cmd->chanlist_len; n++) { |
| 973 | bits |= (1U << CR_CHAN(cmd->chanlist[n])); |
| 974 | pol_bits |= (CR_AREF(cmd->chanlist[n]) |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 975 | || CR_RANGE(cmd-> |
| 976 | chanlist[n]) ? 1U : 0U) |
| 977 | << CR_CHAN(cmd->chanlist[n]); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 978 | } |
| 979 | } |
| 980 | bits &= ((0x1 << subpriv->dio.intr.num_asic_chans) - |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 981 | 1) << subpriv->dio.intr.first_chan; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 982 | subpriv->dio.intr.enabled_mask = bits; |
| 983 | |
| 984 | { /* the below code configures the board to use a specific IRQ from 0-15. */ |
| 985 | unsigned char b; |
| 986 | /* set resource enable register to enable IRQ operation */ |
| 987 | outb(1 << 4, dev->iobase + 3); |
| 988 | /* set bits 0-3 of b to the irq number from 0-15 */ |
| 989 | b = dev->irq & ((1 << 4) - 1); |
| 990 | outb(b, dev->iobase + 2); |
| 991 | /* done, we told the board what irq to use */ |
| 992 | } |
| 993 | |
| 994 | switch_page(dev, asic, PAGE_ENAB); |
| 995 | for (port = firstport; port < firstport + nports; ++port) { |
| 996 | unsigned enab = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 997 | bits >> (subpriv->dio.intr.first_chan + (port - |
| 998 | firstport) |
| 999 | * 8) & 0xff, pol = |
| 1000 | pol_bits >> (subpriv->dio.intr.first_chan + |
| 1001 | (port - firstport) * 8) & 0xff; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1002 | /* set enab intrs for this subdev.. */ |
| 1003 | outb(enab, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1004 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1005 | switch_page(dev, asic, PAGE_POL); |
| 1006 | outb(pol, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1007 | devpriv->asics[asic].iobase + REG_ENAB0 + port); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1008 | } |
| 1009 | } |
| 1010 | return 0; |
| 1011 | } |
| 1012 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1013 | static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1014 | { |
| 1015 | unsigned long flags; |
| 1016 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1017 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1018 | if (subpriv->dio.intr.active) |
| 1019 | pcmmio_stop_intr(dev, s); |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1020 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1021 | |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice. |
| 1027 | */ |
| 1028 | static int |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1029 | pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1030 | unsigned int trignum) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1031 | { |
| 1032 | unsigned long flags; |
| 1033 | int event = 0; |
| 1034 | |
| 1035 | if (trignum != 0) |
| 1036 | return -EINVAL; |
| 1037 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1038 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1039 | s->async->inttrig = 0; |
| 1040 | if (subpriv->dio.intr.active) { |
| 1041 | event = pcmmio_start_intr(dev, s); |
| 1042 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1043 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1044 | |
| 1045 | if (event) { |
| 1046 | comedi_event(dev, s); |
| 1047 | } |
| 1048 | |
| 1049 | return 1; |
| 1050 | } |
| 1051 | |
| 1052 | /* |
| 1053 | * 'do_cmd' function for an 'INTERRUPT' subdevice. |
| 1054 | */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1055 | static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1056 | { |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 1057 | struct comedi_cmd *cmd = &s->async->cmd; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1058 | unsigned long flags; |
| 1059 | int event = 0; |
| 1060 | |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1061 | spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1062 | subpriv->dio.intr.active = 1; |
| 1063 | |
| 1064 | /* Set up end of acquisition. */ |
| 1065 | switch (cmd->stop_src) { |
| 1066 | case TRIG_COUNT: |
| 1067 | subpriv->dio.intr.continuous = 0; |
| 1068 | subpriv->dio.intr.stop_count = cmd->stop_arg; |
| 1069 | break; |
| 1070 | default: |
| 1071 | /* TRIG_NONE */ |
| 1072 | subpriv->dio.intr.continuous = 1; |
| 1073 | subpriv->dio.intr.stop_count = 0; |
| 1074 | break; |
| 1075 | } |
| 1076 | |
| 1077 | /* Set up start of acquisition. */ |
| 1078 | switch (cmd->start_src) { |
| 1079 | case TRIG_INT: |
| 1080 | s->async->inttrig = pcmmio_inttrig_start_intr; |
| 1081 | break; |
| 1082 | default: |
| 1083 | /* TRIG_NOW */ |
| 1084 | event = pcmmio_start_intr(dev, s); |
| 1085 | break; |
| 1086 | } |
Greg Kroah-Hartman | 5f74ea1 | 2009-04-27 14:44:31 -0700 | [diff] [blame] | 1087 | spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1088 | |
| 1089 | if (event) { |
| 1090 | comedi_event(dev, s); |
| 1091 | } |
| 1092 | |
| 1093 | return 0; |
| 1094 | } |
| 1095 | |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1096 | static int |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1097 | pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
| 1098 | struct comedi_cmd *cmd) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1099 | { |
Bill Pemberton | 0b8f754 | 2009-05-14 15:24:29 -0400 | [diff] [blame] | 1100 | return comedi_pcm_cmdtest(dev, s, cmd); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1101 | } |
| 1102 | |
| 1103 | static int adc_wait_ready(unsigned long iobase) |
| 1104 | { |
| 1105 | unsigned long retry = 100000; |
| 1106 | while (retry--) |
| 1107 | if (inb(iobase + 3) & 0x80) |
| 1108 | return 0; |
| 1109 | return 1; |
| 1110 | } |
| 1111 | |
| 1112 | /* All this is for AI and AO */ |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1113 | static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1114 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1115 | { |
| 1116 | int n; |
| 1117 | unsigned long iobase = subpriv->iobase; |
| 1118 | |
| 1119 | /* |
| 1120 | 1. write the CMD byte (to BASE+2) |
| 1121 | 2. read junk lo byte (BASE+0) |
| 1122 | 3. read junk hi byte (BASE+1) |
| 1123 | 4. (mux settled so) write CMD byte again (BASE+2) |
| 1124 | 5. read valid lo byte(BASE+0) |
| 1125 | 6. read valid hi byte(BASE+1) |
| 1126 | |
| 1127 | Additionally note that the BASE += 4 if the channel >= 8 |
| 1128 | */ |
| 1129 | |
| 1130 | /* convert n samples */ |
| 1131 | for (n = 0; n < insn->n; n++) { |
| 1132 | unsigned chan = CR_CHAN(insn->chanspec), range = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1133 | CR_RANGE(insn->chanspec), aref = CR_AREF(insn->chanspec); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1134 | unsigned char command_byte = 0; |
| 1135 | unsigned iooffset = 0; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 1136 | short sample, adc_adjust = 0; |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1137 | |
| 1138 | if (chan > 7) |
| 1139 | chan -= 8, iooffset = 4; /* use the second dword for channels > 7 */ |
| 1140 | |
| 1141 | if (aref != AREF_DIFF) { |
| 1142 | aref = AREF_GROUND; |
| 1143 | command_byte |= 1 << 7; /* set bit 7 to indicate single-ended */ |
| 1144 | } |
| 1145 | if (range < 2) |
| 1146 | adc_adjust = 0x8000; /* bipolar ranges (-5,5 .. -10,10 need to be adjusted -- that is.. they need to wrap around by adding 0x8000 */ |
| 1147 | |
| 1148 | if (chan % 2) { |
| 1149 | command_byte |= 1 << 6; /* odd-numbered channels have bit 6 set */ |
| 1150 | } |
| 1151 | |
| 1152 | /* select the channel, bits 4-5 == chan/2 */ |
| 1153 | command_byte |= ((chan / 2) & 0x3) << 4; |
| 1154 | |
| 1155 | /* set the range, bits 2-3 */ |
| 1156 | command_byte |= (range & 0x3) << 2; |
| 1157 | |
| 1158 | /* need to do this twice to make sure mux settled */ |
| 1159 | outb(command_byte, iobase + iooffset + 2); /* chan/range/aref select */ |
| 1160 | |
| 1161 | adc_wait_ready(iobase + iooffset); /* wait for the adc to say it finised the conversion */ |
| 1162 | |
| 1163 | outb(command_byte, iobase + iooffset + 2); /* select the chan/range/aref AGAIN */ |
| 1164 | |
| 1165 | adc_wait_ready(iobase + iooffset); |
| 1166 | |
| 1167 | sample = inb(iobase + iooffset + 0); /* read data lo byte */ |
| 1168 | sample |= inb(iobase + iooffset + 1) << 8; /* read data hi byte */ |
| 1169 | sample += adc_adjust; /* adjustment .. munge data */ |
| 1170 | data[n] = sample; |
| 1171 | } |
| 1172 | /* return the number of samples read/written */ |
| 1173 | return n; |
| 1174 | } |
| 1175 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1176 | static int ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1177 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1178 | { |
| 1179 | int n; |
| 1180 | for (n = 0; n < insn->n; n++) { |
| 1181 | unsigned chan = CR_CHAN(insn->chanspec); |
| 1182 | if (chan < s->n_chan) |
| 1183 | data[n] = subpriv->ao.shadow_samples[chan]; |
| 1184 | } |
| 1185 | return n; |
| 1186 | } |
| 1187 | |
| 1188 | static int wait_dac_ready(unsigned long iobase) |
| 1189 | { |
| 1190 | unsigned long retry = 100000L; |
| 1191 | |
| 1192 | /* This may seem like an absurd way to handle waiting and violates the |
| 1193 | "no busy waiting" policy. The fact is that the hardware is |
| 1194 | normally so fast that we usually only need one time through the loop |
| 1195 | anyway. The longer timeout is for rare occasions and for detecting |
| 1196 | non-existant hardware. */ |
| 1197 | |
| 1198 | while (retry--) { |
| 1199 | if (inb(iobase + 3) & 0x80) |
| 1200 | return 0; |
| 1201 | |
| 1202 | } |
| 1203 | return 1; |
| 1204 | } |
| 1205 | |
Bill Pemberton | da91b26 | 2009-04-09 16:07:03 -0400 | [diff] [blame] | 1206 | static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1207 | struct comedi_insn *insn, unsigned int *data) |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1208 | { |
| 1209 | int n; |
| 1210 | unsigned iobase = subpriv->iobase, iooffset = 0; |
| 1211 | |
| 1212 | for (n = 0; n < insn->n; n++) { |
| 1213 | unsigned chan = CR_CHAN(insn->chanspec), range = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1214 | CR_RANGE(insn->chanspec); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1215 | if (chan < s->n_chan) { |
| 1216 | unsigned char command_byte = 0, range_byte = |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame^] | 1217 | range & ((1 << 4) - 1); |
Calin Culianu | 6baef15 | 2009-02-19 09:13:10 -0800 | [diff] [blame] | 1218 | if (chan >= 4) |
| 1219 | chan -= 4, iooffset += 4; |
| 1220 | /* set the range.. */ |
| 1221 | outb(range_byte, iobase + iooffset + 0); |
| 1222 | outb(0, iobase + iooffset + 1); |
| 1223 | |
| 1224 | /* tell it to begin */ |
| 1225 | command_byte = (chan << 1) | 0x60; |
| 1226 | outb(command_byte, iobase + iooffset + 2); |
| 1227 | |
| 1228 | wait_dac_ready(iobase + iooffset); |
| 1229 | |
| 1230 | outb(data[n] & 0xff, iobase + iooffset + 0); /* low order byte */ |
| 1231 | outb((data[n] >> 8) & 0xff, iobase + iooffset + 1); /* high order byte */ |
| 1232 | command_byte = 0x70 | (chan << 1); /* set bit 4 of command byte to indicate data is loaded and trigger conversion */ |
| 1233 | /* trigger converion */ |
| 1234 | outb(command_byte, iobase + iooffset + 2); |
| 1235 | |
| 1236 | wait_dac_ready(iobase + iooffset); |
| 1237 | |
| 1238 | subpriv->ao.shadow_samples[chan] = data[n]; /* save to shadow register for ao_rinsn */ |
| 1239 | } |
| 1240 | } |
| 1241 | return n; |
| 1242 | } |
| 1243 | |
| 1244 | /* |
| 1245 | * A convenient macro that defines init_module() and cleanup_module(), |
| 1246 | * as necessary. |
| 1247 | */ |
| 1248 | COMEDI_INITCLEANUP(driver); |