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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 86 | f9daq | 1 | //**************************************************************************** |
| 2 | // Copyright (C) 2000-2006 ARW Elektronik Germany |
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| 3 | // |
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| 4 | // |
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| 5 | // This program is free software; you can redistribute it and/or modify |
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| 6 | // it under the terms of the GNU General Public License as published by |
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| 7 | // the Free Software Foundation; either version 2 of the License, or |
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| 8 | // (at your option) any later version. |
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| 9 | // |
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| 10 | // This program is distributed in the hope that it will be useful, |
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| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | // GNU General Public License for more details. |
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| 14 | // |
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| 15 | // You should have received a copy of the GNU General Public License |
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| 16 | // along with this program; if not, write to the Free Software |
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| 17 | // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 18 | // |
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| 19 | // This product is not authorized for use as critical component in |
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| 20 | // life support systems without the express written approval of |
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| 21 | // ARW Elektronik Germany. |
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| 22 | // |
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| 23 | // Please announce changes and hints to ARW Elektronik |
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| 24 | // |
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| 25 | // Maintainer(s): Klaus Hitschler (klaus.hitschler@gmx.de) |
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| 26 | // |
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| 27 | //**************************************************************************** |
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| 28 | |||
| 29 | //**************************************************************************** |
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| 30 | // Revision 1.20 support for kernel version=3.13.0-37-generic 2014/10/19 Rok Pestotnik |
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| 31 | // fops.c -- the file operations module for the PCICC32 PCI to CAMAC Interface |
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| 32 | // |
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| 33 | // $Log: fops.c,v $ |
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| 34 | // Revision 1.19 2006/06/04 12:26:07 klaus |
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| 35 | // release_20060604; Version 6.9; pci_{en|dis}able_device() added; remap_page_range reorganized |
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| 36 | // |
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| 37 | // Revision 1.18 2006/03/28 21:49:49 klaus |
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| 38 | // release_20060328; Version 6.8; Support for AMD64 and Kernel 2.6.15 |
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| 39 | // |
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| 40 | // Revision 1.17 2005/03/11 13:23:26 klaus |
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| 41 | // simple corrections for to use with kernels 2.4.21 |
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| 42 | // |
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| 43 | // Revision 1.16 2004/08/12 19:59:19 klaus |
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| 44 | // conversion to kernel-version 2.6, released version 6.0 |
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| 45 | // |
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| 46 | // Revision 1.15 2004/01/16 18:40:34 klaus |
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| 47 | // converted remap_page_range call for kernels >= 2.4.20, contributed by Roberto Bertoni |
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| 48 | // |
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| 49 | // Revision 1.14 2003/12/04 20:34:49 klaus |
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| 50 | // minor change: restore the hardware set intCSR content at release of path, release of version 5.2 |
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| 51 | // |
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| 52 | // Revision 1.13 2003/06/19 08:23:38 klaus |
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| 53 | // re-compiled with RH-7.2 (kernel 2.4.10) |
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| 54 | // |
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| 55 | // Revision 1.12 2003/05/11 11:12:03 klaus |
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| 56 | // matched to kernel 2.4 PCI handling, debug messages improved |
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| 57 | // |
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| 58 | // Revision 1.11 2002/10/08 18:01:46 klaus |
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| 59 | // corrections mainly for use with kernel 2.2.19 |
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| 60 | // |
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| 61 | // Revision 1.10 2002/08/06 19:06:50 klaus |
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| 62 | // Small changes |
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| 63 | // |
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| 64 | // Revision 1.9 2002/04/17 19:41:06 klaus |
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| 65 | // added support for autoread |
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| 66 | // |
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| 67 | // Revision 1.8 2002/04/17 18:57:33 klaus |
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| 68 | // last changes to release 4.4 |
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| 69 | // |
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| 70 | // Revision 1.7 2002/04/14 18:25:38 klaus |
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| 71 | // added interrupt handling, driver 4.4. ...3.5.tar.gz |
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| 72 | // |
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| 73 | // Revision 1.6 2001/11/20 21:29:24 klaus |
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| 74 | // Small changes to correct versioning down to kernel 2.3 |
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| 75 | // |
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| 76 | // Revision 1.5 2001/11/20 20:25:23 klaus |
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| 77 | // inserted versioning for kernel 2.4 |
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| 78 | // |
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| 79 | // Revision 1.4 2001/11/20 20:12:50 klaus |
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| 80 | // included new header and CVS log |
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| 81 | // |
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| 82 | // first steps (on my mothers birthday) AR 23.02.2000 |
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| 83 | // MAKE_CC32_ADR serves only F from 0..15 AR 24.04.2000 |
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| 84 | // MODVERSIONS included AR 24.04.2000 |
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| 85 | // |
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| 86 | //**************************************************************************** |
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| 87 | |||
| 88 | /*--- INCLUDES -----------------------------------------------------------------------------------*/ |
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| 89 | #include "common.h" /* must be the first include */ |
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| 90 | |||
| 91 | #include <linux/kernel.h> /* printk() */ |
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| 92 | #include <linux/mm.h> |
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| 93 | #include <linux/module.h> /* MODULE_AUTHOR and MAJOR ... */ |
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| 94 | #include <linux/pci.h> |
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| 95 | #include <asm/errno.h> |
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| 96 | #include <asm/types.h> |
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| 97 | #include <asm/uaccess.h> |
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| 98 | #include <linux/sched.h> |
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| 99 | #include <linux/wait.h> |
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| 100 | #include <linux/poll.h> |
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| 101 | |||
| 102 | #include "fops.h" |
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| 103 | #include "list.h" |
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| 104 | #include "plx9050.h" |
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| 105 | #include "pcicc32.h" /* the common ioctl commands and structures between driver and application */ |
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| 106 | |||
| 107 | /*--- DEFINES ------------------------------------------------------------------------------------*/ |
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| 108 | MODULE_AUTHOR("klaus.hitschler@gmx.de"); |
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| 109 | MODULE_DESCRIPTION("Driver for ARW Elektronik PCI CAMAC interface."); |
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| 110 | MODULE_SUPPORTED_DEVICE("PCICC32"); |
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| 111 | |||
| 112 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,10) |
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| 113 | MODULE_LICENSE("GPL"); // since 2.4.? |
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| 114 | #endif |
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| 115 | |||
| 116 | #ifndef MINOR |
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| 117 | #define MINOR(x) minor(x) // since 2.5.? |
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| 118 | #endif |
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| 119 | |||
| 120 | #define MAKE_CC32_ADR(N, A, F) (u16)((N << 10) + (A << 6) + ((F & 0xf) << 2)) |
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| 121 | |||
| 122 | #define ENABLE_PCIADA_IRQS (u16)0x0049 /* enable PCIADA IRQs */ |
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| 123 | #define DISABLE_PCIADA_IRQS (u16)0x0009 /* disable PCIADA IRQs */ |
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| 124 | |||
| 125 | /*--- EXTERNALS ----------------------------------------------------------------------------------*/ |
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| 126 | extern int get_module_info(CC32_DESCRIPTOR *wd, u8 *cModuleNumber, u8 *cFPGAVersion); |
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| 127 | extern int test_connection(CC32_DESCRIPTOR *wd); |
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| 128 | extern List *pcicc32_work_device_header; |
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| 129 | |||
| 130 | /*--- TYPEDEFS -----------------------------------------------------------------------------------*/ |
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| 131 | typedef struct |
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| 132 | { |
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| 133 | CC32_DESCRIPTOR *desc; /* pointer to my PCIADA & CC32 */ |
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| 134 | } PRIVATE_DATA; |
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| 135 | |||
| 136 | /*--- FUNCTIONS ----------------------------------------------------------------------------------*/ |
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| 137 | static void switch_CC32_on(CC32_DESCRIPTOR *desc) |
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| 138 | { |
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| 139 | u16 cntrl; |
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| 140 | |||
| 141 | DPRINTK(KERN_DEBUG "pcicc32 : switch_CC32_on()\n"); |
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| 142 | |||
| 143 | cntrl = readw(desc->pLCR + PLX9050_CNTRL); /* read CONTROL register */ |
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| 144 | cntrl |= 0x0180; |
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| 145 | writew(cntrl, desc->pLCR + PLX9050_CNTRL); /* enable access */ |
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| 146 | } |
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| 147 | |||
| 148 | static void switch_CC32_off(CC32_DESCRIPTOR *desc) |
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| 149 | { |
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| 150 | u16 cntrl = readw(desc->pLCR + PLX9050_CNTRL); /* read CONTROL register */ |
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| 151 | |||
| 152 | DPRINTK(KERN_DEBUG "pcicc32 : switch_CC32_off()\n"); |
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| 153 | |||
| 154 | writew(DISABLE_PCIADA_IRQS, desc->pLCR + PLX9050_INTCSR); /* disable global interrupts */ |
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| 155 | cntrl &= ~0x0100; |
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| 156 | writew(cntrl, desc->pLCR + PLX9050_CNTRL); /* disable access */ |
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| 157 | } |
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| 158 | |||
| 159 | int pcicc32_ioctl(struct inode *pInode, struct file *pFile, unsigned int cmd, unsigned long arg) |
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| 160 | { |
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| 161 | u16 cntrl; |
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| 162 | PRIVATE_DATA *pd = (PRIVATE_DATA *)pFile->private_data; |
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| 163 | CC32_DESCRIPTOR *wd = pd->desc; |
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| 164 | |||
| 165 | DPRINTK(KERN_DEBUG "pcicc32 : pcicc32_ioctl(0x%08x, 0x%08lx)\n", cmd, arg); |
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| 166 | |||
| 167 | if (_IOC_TYPE(cmd) != PCICC32_MAGIC) |
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| 168 | return -EINVAL; |
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| 169 | |||
| 170 | switch(_IOC_NR(cmd)) |
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| 171 | { |
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| 172 | case 1: // PCICC32_IOSTATE |
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| 173 | { |
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| 174 | PCICC32_STATUS *ptr = (PCICC32_STATUS *)arg; /* makes it simple */ |
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| 175 | |||
| 176 | if (_IOC_SIZE(cmd) < sizeof(PCICC32_STATUS)) |
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| 177 | return -EINVAL; |
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| 178 | if (!access_ok(VERIFY_WRITE, ptr, sizeof(*ptr))) |
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| 179 | return -EFAULT; |
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| 180 | |||
| 181 | ptr->bConnected = ((wd->bConnected) && (readw(wd->pLCR + PLX9050_CNTRL) & 0x0800)) ? 1 : 0; |
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| 182 | ptr->bFail = (readw(wd->pLCR + PLX9050_INTCSR) & 0x0020) ? 1 : 0; |
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| 183 | ptr->bIrq = (readw(wd->pLCR + PLX9050_INTCSR) & 0x0004) ? 1 : 0; |
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| 184 | |||
| 185 | wd->wIrqStatus = 0; // clear the status since it is read |
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| 186 | } |
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| 187 | break; |
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| 188 | case 2: // PCICC32_IOCNTRL |
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| 189 | { |
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| 190 | if (_IOC_SIZE(cmd)) |
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| 191 | return -EINVAL; |
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| 192 | |||
| 193 | cntrl = readw(wd->pLCR + PLX9050_CNTRL); /* read CONTROL register */ |
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| 194 | writew(cntrl & ~0x0100, wd->pLCR + PLX9050_CNTRL); /* clear USRIO2 */ |
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| 195 | writew(cntrl , wd->pLCR + PLX9050_CNTRL); /* restore it */ |
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| 196 | } |
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| 197 | break; |
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| 198 | case 3: // PCICC32_CONTROL_INTERRUPTS |
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| 199 | { |
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| 200 | PCICC32_IRQ_CONTROL *ptr = (PCICC32_IRQ_CONTROL *)arg; /* makes it simple */ |
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| 201 | char bEnable = (readw(wd->pLCR + PLX9050_INTCSR) & 0x40) ? 1 : 0; |
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| 202 | |||
| 203 | if (_IOC_SIZE(cmd) < sizeof(PCICC32_IRQ_CONTROL)) |
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| 204 | return -EINVAL; |
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| 205 | if (!access_ok(VERIFY_WRITE, ptr, sizeof(*ptr))) |
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| 206 | return -EFAULT; |
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| 207 | |||
| 208 | DPRINTK(KERN_DEBUG "pcicc32 : Interrupt enable = %d\n", ptr->bEnable); |
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| 209 | |||
| 210 | if (ptr->bEnable) |
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| 211 | writew(ENABLE_PCIADA_IRQS ,wd->pLCR + PLX9050_INTCSR); // local and global enable |
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| 212 | else |
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| 213 | writew(DISABLE_PCIADA_IRQS ,wd->pLCR + PLX9050_INTCSR); // global disable |
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| 214 | |||
| 215 | // return last interrupt enable status |
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| 216 | ptr->bEnable = bEnable; |
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| 217 | } |
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| 218 | break; |
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| 219 | case 4: // PCICC32_IOSTATE_BLOCKING |
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| 220 | { |
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| 221 | PCICC32_STATUS *ptr = (PCICC32_STATUS *)arg; /* makes it simple */ |
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| 222 | int err; |
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| 223 | |||
| 224 | if (_IOC_SIZE(cmd) < sizeof(PCICC32_STATUS)) |
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| 225 | return -EINVAL; |
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| 226 | |||
| 227 | // support nonblocking read if requested |
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| 228 | if ((pFile->f_flags & O_NONBLOCK) && (!wd->wIrqStatus)) |
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| 229 | return -EAGAIN; |
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| 230 | |||
| 231 | // sleep until data are available |
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| 232 | if ((err = wait_event_interruptible(wd->event_queue, (wd->wIrqStatus)))) |
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| 233 | return err; |
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| 234 | |||
| 235 | if (!access_ok(VERIFY_WRITE, ptr, sizeof(*ptr))) |
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| 236 | return -EFAULT; |
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| 237 | |||
| 238 | ptr->bConnected = ((wd->bConnected) && (readw(wd->pLCR + PLX9050_CNTRL) & 0x0800)) ? 1 : 0; |
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| 239 | ptr->bFail = (readw(wd->pLCR + PLX9050_INTCSR) & 0x0020) ? 1 : 0; |
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| 240 | ptr->bIrq = (readw(wd->pLCR + PLX9050_INTCSR) & 0x0004) ? 1 : 0; |
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| 241 | |||
| 242 | wd->wIrqStatus = 0; // clear the status since it is read |
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| 243 | } |
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| 244 | break; |
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| 245 | case 5: // PCICC32_AUTOREAD_SWITCH |
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| 246 | { |
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| 247 | u16 ctrl, erg; |
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| 248 | |||
| 249 | PCICC32_AUTOREAD *ptr = (PCICC32_AUTOREAD *)arg; /* makes it simple */ |
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| 250 | |||
| 251 | if (_IOC_SIZE(cmd) < sizeof(PCICC32_AUTOREAD)) |
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| 252 | return -EINVAL; |
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| 253 | |||
| 254 | if (!access_ok(VERIFY_WRITE, ptr, sizeof(*ptr))) |
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| 255 | return -EFAULT; |
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| 256 | |||
| 257 | ctrl = readw(wd->pLCR + PLX9050_CNTRL); |
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| 258 | if (ptr->bOn) |
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| 259 | { |
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| 260 | erg = ctrl & ~0x0004; |
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| 261 | erg |= 0x0002; // switch output to 1, pin to 0 = on |
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| 262 | writew(erg, wd->pLCR + PLX9050_CNTRL); |
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| 263 | } |
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| 264 | else |
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| 265 | { |
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| 266 | erg = ctrl | 0x0006; // switch output = 1, pin to 1 = off |
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| 267 | writew(erg, wd->pLCR + PLX9050_CNTRL); |
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| 268 | } |
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| 269 | |||
| 270 | // respond the last state |
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| 271 | ptr->bOn = (ctrl & 0x0004) ? 0 : 1; |
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| 272 | } |
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| 273 | break; |
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| 274 | |||
| 275 | default: |
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| 276 | return -EINVAL; |
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| 277 | } |
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| 278 | |||
| 279 | return 0; |
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| 280 | } |
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| 281 | |||
| 282 | |||
| 283 | static long pcicc32_unlocked_ioctl(struct file *pFile, unsigned int cmd, unsigned long arg){ |
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| 284 | long retval=0; |
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| 285 | |||
| 286 | |||
| 287 | #if HAVE_UNLOCKED_IOCTL |
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| 288 | struct mutex fs_mutex; |
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| 289 | mutex_init(&fs_mutex); |
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| 290 | mutex_lock(&fs_mutex); |
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| 291 | #else |
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| 292 | lock_kernel(); |
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| 293 | #endif |
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| 294 | |||
| 295 | DPRINTK(KERN_DEBUG "%s : pcicc32_unlocked_ioctl(0x%08x), size = %d\n", DEVICE_NAME, cmd, _IOC_SIZE(cmd)); |
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| 296 | retval = pcicc32_ioctl(NULL, pFile, cmd,arg); |
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| 297 | |||
| 298 | #if HAVE_UNLOCKED_IOCTL |
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| 299 | mutex_unlock(&fs_mutex); |
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| 300 | #else |
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| 301 | unlock_kernel(); |
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| 302 | #endif |
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| 303 | |||
| 304 | return retval; |
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| 305 | } |
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| 306 | |||
| 307 | int pcicc32_mmap(struct file *pFile, struct vm_area_struct *vma) |
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| 308 | { |
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| 309 | PRIVATE_DATA *pd = (PRIVATE_DATA *)pFile->private_data; |
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| 310 | |||
| 311 | DPRINTK(KERN_DEBUG "pcicc32 : pcicc32_mmap()\n"); |
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| 312 | |||
| 313 | if (pd->desc->pPch->desc[3].type == PCI_BASE_ADDRESS_MEM_TYPE_1M) |
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| 314 | { |
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| 315 | DPRINTK(KERN_DEBUG "pcicc32 : mmap(address=%p size=%d)\n", |
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| 316 | virt_to_phys((void *)pd->desc->pUsr), pd->desc->pPch->desc[3].size); |
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| 317 | |||
| 318 | if (pcicc32_remap_page_range(vma, vma->vm_start, |
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| 319 | virt_to_phys((void *)pd->desc->pUsr), pd->desc->pPch->desc[3].size, PAGE_SHARED)) |
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| 320 | return -EAGAIN; |
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| 321 | } |
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| 322 | else |
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| 323 | { |
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| 324 | DPRINTK(KERN_DEBUG "pcicc32 : mmap(address=%p size=%d)\n", |
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| 325 | virt_to_phys((void *)pd->desc->pUsr), pd->desc->pPch->desc[3].size); |
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| 326 | |||
| 327 | if (pcicc32_remap_page_range(vma, vma->vm_start, |
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| 328 | pd->desc->pPch->desc[3].base_address, pd->desc->pPch->desc[3].size, PAGE_SHARED)) |
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| 329 | return -EAGAIN; |
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| 330 | } |
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| 331 | |||
| 332 | return 0; |
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| 333 | } |
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| 334 | |||
| 335 | |||
| 336 | |||
| 337 | int pcicc32_open(struct inode *pInode, struct file *pFile) |
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| 338 | { |
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| 339 | CC32_DESCRIPTOR *wd = 0; |
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| 340 | CC32_DESCRIPTOR *desc = 0; |
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| 341 | int i; |
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| 342 | Node *n; |
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| 343 | int nMinor = MINOR(pInode->i_rdev); |
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| 344 | PRIVATE_DATA *pd; |
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| 345 | |||
| 346 | DPRINTK(KERN_DEBUG "pcicc32 : pcicc32_open(), Major=%d, Minor=%d\n", MAJOR(pInode->i_rdev), nMinor); |
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| 347 | |||
| 348 | /* search for device */ |
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| 349 | i = getNumOfNodesInList(pcicc32_work_device_header); |
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| 350 | n = getFirstNode(pcicc32_work_device_header); |
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| 351 | |||
| 352 | DPRINTK(KERN_DEBUG "pcicc32 : scanning %d devices\n", i); |
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| 353 | while (i--) |
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| 354 | { |
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| 355 | wd = (CC32_DESCRIPTOR *)getContent(n); |
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| 356 | |||
| 357 | wd->bConnected = get_module_info(wd, &wd->cModuleNumber, &wd->cFPGAVersion); |
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| 358 | if (wd->bConnected) |
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| 359 | { |
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| 360 | if (test_connection(wd)) |
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| 361 | { |
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| 362 | printk(KERN_ERR "pcicc32 : connection test for module %d failed!\n", wd->cModuleNumber); |
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| 363 | wd->bConnected = 0; |
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| 364 | } |
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| 365 | else |
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| 366 | if (wd->cModuleNumber == nMinor) |
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| 367 | { |
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| 368 | desc = wd; |
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| 369 | break; |
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| 370 | } |
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| 371 | } |
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| 372 | else |
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| 373 | { |
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| 374 | DPRINTK(KERN_DEBUG "pcicc32 : module %d not connected!\n", nMinor); |
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| 375 | } |
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| 376 | |||
| 377 | n = getNextNode(n); |
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| 378 | } |
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| 379 | |||
| 380 | if (desc) |
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| 381 | { |
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| 382 | pFile->private_data = (void *)kmalloc(sizeof(PRIVATE_DATA), GFP_ATOMIC); |
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| 383 | if (!pFile->private_data) |
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| 384 | return -ENOMEM; |
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| 385 | |||
| 386 | pd = (PRIVATE_DATA *)pFile->private_data; |
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| 387 | pd->desc = wd; |
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| 388 | |||
| 389 | DPRINTK(KERN_DEBUG "pcicc32 : found CC32 module with number %d.\n", nMinor); |
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| 390 | } |
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| 391 | else |
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| 392 | { |
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| 393 | DPRINTK(KERN_DEBUG "pcicc32 : No CC32 module found.\n"); |
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| 394 | |||
| 395 | return -ENODEV; |
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| 396 | } |
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| 397 | |||
| 398 | switch_CC32_on(wd); |
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| 399 | |||
| 400 | __MOD_INC_USE_COUNT__; |
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| 401 | return 0; |
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| 402 | } |
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| 403 | |||
| 404 | int pcicc32_release(struct inode *pInode, struct file *pFile) |
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| 405 | { |
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| 406 | PRIVATE_DATA *pd; |
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| 407 | |||
| 408 | DPRINTK(KERN_DEBUG "pcicc32 : pcicc32_release()\n"); |
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| 409 | |||
| 410 | if (pFile->private_data) |
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| 411 | { |
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| 412 | pd = (PRIVATE_DATA *)pFile->private_data; |
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| 413 | if (pd && pd->desc) |
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| 414 | { |
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| 415 | switch_CC32_off(pd->desc); |
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| 416 | pd->desc = 0; |
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| 417 | } |
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| 418 | |||
| 419 | kfree_s(pd, sizeof(*pd)); // FREE(pFile->private_data); |
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| 420 | } |
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| 421 | |||
| 422 | __MOD_DEC_USE_COUNT__; |
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| 423 | return 0; |
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| 424 | } |
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| 425 | |||
| 426 | //---------------------------------------------------------------------------- |
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| 427 | // is called at poll or select |
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| 428 | static unsigned int pcicc32_poll(struct file *pFile, poll_table *wait) |
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| 429 | { |
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| 430 | PRIVATE_DATA *pd = (PRIVATE_DATA *)pFile->private_data; |
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| 431 | CC32_DESCRIPTOR *wd = pd->desc; |
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| 432 | unsigned int mask = 0; |
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| 433 | |||
| 434 | DPRINTK(KERN_DEBUG "pcicc32 : pcicc32_poll()\n"); |
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| 435 | |||
| 436 | poll_wait(pFile, &wd->event_queue, wait); |
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| 437 | |||
| 438 | // return on ops that could be performed without blocking |
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| 439 | if (wd->wIrqStatus) |
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| 440 | mask |= (POLLIN | POLLRDNORM); |
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| 441 | |||
| 442 | return mask; |
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| 443 | } |
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| 444 | |||
| 445 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) |
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| 446 | struct file_operations pcicc32_fops = |
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| 447 | { |
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| 448 | NULL, /* lseek */ |
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| 449 | NULL, /* read */ |
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| 450 | NULL, /* write */ |
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| 451 | NULL, /* readdir */ |
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| 452 | pcicc32_poll, /* poll, since 2.2., replaces select */ |
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| 453 | pcicc32_ioctl, /* ioctl */ |
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| 454 | pcicc32_mmap, /* mmap */ |
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| 455 | pcicc32_open, /* open */ |
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| 456 | NULL, /* flush */ |
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| 457 | pcicc32_release,/* release */ |
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| 458 | }; |
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| 459 | #else |
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| 460 | struct file_operations pcicc32_fops = |
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| 461 | { |
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| 462 | unlocked_ioctl : pcicc32_unlocked_ioctl, /* ioctl */ |
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| 463 | // ioctl: pcicc32_ioctl, /* ioctl */ |
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| 464 | mmap: pcicc32_mmap, /* mmap */ |
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| 465 | open: pcicc32_open, /* open */ |
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| 466 | release: pcicc32_release, /* release */ |
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| 467 | poll: pcicc32_poll, /* poll */ |
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| 468 | }; |
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| 469 | #endif |
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| 470 | |||
| 471 |