drivers/input/gameport/cs461x.c

   1 /*
   2         The all defines and part of code (such as cs461x_*) are
   3         contributed from ALSA 0.5.8 sources.
   4         See http://www.alsa-project.org/ for sources
   5
   6         Tested on Linux 686 2.4.0-test9, ALSA 0.5.8a and CS4610
   7 */
   8
   9 #include <asm/io.h>
  10
  11 #include <linux/module.h>
  12 #include <linux/ioport.h>
  13 #include <linux/config.h>
  14 #include <linux/init.h>
  15 #include <linux/gameport.h>
  16 #include <linux/slab.h>
  17 #include <linux/pci.h>
  18
  19 MODULE_AUTHOR("Victor Krapivin");
  20 MODULE_LICENSE("GPL");
  21
  22 /*
  23         These options are experimental
  24
  25 #define CS461X_FULL_MAP
  26 */
  27
  28
  29 #ifndef PCI_VENDOR_ID_CIRRUS
  30 #define PCI_VENDOR_ID_CIRRUS            0x1013
  31 #endif
  32 #ifndef PCI_DEVICE_ID_CIRRUS_4610
  33 #define PCI_DEVICE_ID_CIRRUS_4610       0x6001
  34 #endif
  35 #ifndef PCI_DEVICE_ID_CIRRUS_4612
  36 #define PCI_DEVICE_ID_CIRRUS_4612       0x6003
  37 #endif
  38 #ifndef PCI_DEVICE_ID_CIRRUS_4615
  39 #define PCI_DEVICE_ID_CIRRUS_4615       0x6004
  40 #endif
  41
  42 /* Registers */
  43
  44 #define BA0_JSPT                                0x00000480
  45 #define BA0_JSCTL                               0x00000484
  46 #define BA0_JSC1                                0x00000488
  47 #define BA0_JSC2                                0x0000048C
  48 #define BA0_JSIO                                0x000004A0
  49
  50 /* Bits for JSPT */
  51
  52 #define JSPT_CAX                                0x00000001
  53 #define JSPT_CAY                                0x00000002
  54 #define JSPT_CBX                                0x00000004
  55 #define JSPT_CBY                                0x00000008
  56 #define JSPT_BA1                                0x00000010
  57 #define JSPT_BA2                                0x00000020
  58 #define JSPT_BB1                                0x00000040
  59 #define JSPT_BB2                                0x00000080
  60
  61 /* Bits for JSCTL */
  62
  63 #define JSCTL_SP_MASK                           0x00000003
  64 #define JSCTL_SP_SLOW                           0x00000000
  65 #define JSCTL_SP_MEDIUM_SLOW                    0x00000001
  66 #define JSCTL_SP_MEDIUM_FAST                    0x00000002
  67 #define JSCTL_SP_FAST                           0x00000003
  68 #define JSCTL_ARE                               0x00000004
  69
  70 /* Data register pairs masks */
  71
  72 #define JSC1_Y1V_MASK                           0x0000FFFF
  73 #define JSC1_X1V_MASK                           0xFFFF0000
  74 #define JSC1_Y1V_SHIFT                          0
  75 #define JSC1_X1V_SHIFT                          16
  76 #define JSC2_Y2V_MASK                           0x0000FFFF
  77 #define JSC2_X2V_MASK                           0xFFFF0000
  78 #define JSC2_Y2V_SHIFT                          0
  79 #define JSC2_X2V_SHIFT                          16
  80
  81 /* JS GPIO */
  82
  83 #define JSIO_DAX                                0x00000001
  84 #define JSIO_DAY                                0x00000002
  85 #define JSIO_DBX                                0x00000004
  86 #define JSIO_DBY                                0x00000008
  87 #define JSIO_AXOE                               0x00000010
  88 #define JSIO_AYOE                               0x00000020
  89 #define JSIO_BXOE                               0x00000040
  90 #define JSIO_BYOE                               0x00000080
  91
  92 /*
  93    The card initialization code is obfuscated; the module cs461x
  94    need to be loaded after ALSA modules initialized and something
  95    played on the CS 4610 chip (see sources for details of CS4610
  96    initialization code from ALSA)
  97 */
  98
  99 /* Card specific definitions */
 100
 101 #define CS461X_BA0_SIZE         0x2000
 102 #define CS461X_BA1_DATA0_SIZE   0x3000
 103 #define CS461X_BA1_DATA1_SIZE   0x3800
 104 #define CS461X_BA1_PRG_SIZE     0x7000
 105 #define CS461X_BA1_REG_SIZE     0x0100
 106
 107 #define BA1_SP_DMEM0                            0x00000000
 108 #define BA1_SP_DMEM1                            0x00010000
 109 #define BA1_SP_PMEM                             0x00020000
 110 #define BA1_SP_REG                              0x00030000
 111
 112 #define BA1_DWORD_SIZE          (13 * 1024 + 512)
 113 #define BA1_MEMORY_COUNT        3
 114
 115 /*
 116    Only one CS461x card is still suppoted; the code requires
 117    redesign to avoid this limitatuion.
 118 */
 119
 120 static unsigned long ba0_addr;
 121 static unsigned int __iomem *ba0;
 122
 123 #ifdef CS461X_FULL_MAP
 124 static unsigned long ba1_addr;
 125 static union ba1_t {
 126         struct {
 127                 unsigned int __iomem *data0;
 128                 unsigned int __iomem *data1;
 129                 unsigned int __iomem *pmem;
 130                 unsigned int __iomem *reg;
 131         } name;
 132         unsigned int __iomem *idx[4];
 133 } ba1;
 134
 135 static void cs461x_poke(unsigned long reg, unsigned int val)
 136 {
 137         writel(val, &ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff]);
 138 }
 139
 140 static unsigned int cs461x_peek(unsigned long reg)
 141 {
 142         return readl(&ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff]);
 143 }
 144
 145 #endif
 146
 147 static void cs461x_pokeBA0(unsigned long reg, unsigned int val)
 148 {
 149         writel(val, &ba0[reg >> 2]);
 150 }
 151
 152 static unsigned int cs461x_peekBA0(unsigned long reg)
 153 {
 154         return readl(&ba0[reg >> 2]);
 155 }
 156
 157 static int cs461x_free(struct pci_dev *pdev)
 158 {
 159         struct gameport *port = pci_get_drvdata(pdev);
 160
 161         if (port)
 162             gameport_unregister_port(port);
 163
 164         if (ba0) iounmap(ba0);
 165 #ifdef CS461X_FULL_MAP
 166         if (ba1.name.data0) iounmap(ba1.name.data0);
 167         if (ba1.name.data1) iounmap(ba1.name.data1);
 168         if (ba1.name.pmem)  iounmap(ba1.name.pmem);
 169         if (ba1.name.reg)   iounmap(ba1.name.reg);
 170 #endif
 171         return 0;
 172 }
 173
 174 static void cs461x_gameport_trigger(struct gameport *gameport)
 175 {
 176         cs461x_pokeBA0(BA0_JSPT, 0xFF);  //outb(gameport->io, 0xFF);
 177 }
 178
 179 static unsigned char cs461x_gameport_read(struct gameport *gameport)
 180 {
 181         return cs461x_peekBA0(BA0_JSPT); //inb(gameport->io);
 182 }
 183
 184 static int cs461x_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
 185 {
 186         unsigned js1, js2, jst;
 187
 188         js1 = cs461x_peekBA0(BA0_JSC1);
 189         js2 = cs461x_peekBA0(BA0_JSC2);
 190         jst = cs461x_peekBA0(BA0_JSPT);
 191
 192         *buttons = (~jst >> 4) & 0x0F;
 193
 194         axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
 195         axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
 196         axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
 197         axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
 198
 199         for(jst=0;jst<4;++jst)
 200                 if(axes[jst]==0xFFFF) axes[jst] = -1;
 201         return 0;
 202 }
 203
 204 static int cs461x_gameport_open(struct gameport *gameport, int mode)
 205 {
 206         switch (mode) {
 207                 case GAMEPORT_MODE_COOKED:
 208                 case GAMEPORT_MODE_RAW:
 209                         return 0;
 210                 default:
 211                         return -1;
 212         }
 213         return 0;
 214 }
 215
 216 static struct pci_device_id cs461x_pci_tbl[] = {
 217         { PCI_VENDOR_ID_CIRRUS, 0x6001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4610 */
 218         { PCI_VENDOR_ID_CIRRUS, 0x6003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4612 */
 219         { PCI_VENDOR_ID_CIRRUS, 0x6005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4615 */
 220         { 0, }
 221 };
 222 MODULE_DEVICE_TABLE(pci, cs461x_pci_tbl);
 223
 224 static int __devinit cs461x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 225 {
 226         int rc;
 227         struct gameport* port;
 228
 229         rc = pci_enable_device(pdev);
 230         if (rc) {
 231                 printk(KERN_ERR "cs461x: Cannot enable PCI gameport (bus %d, devfn %d) error=%d\n",
 232                         pdev->bus->number, pdev->devfn, rc);
 233                 return rc;
 234         }
 235
 236         ba0_addr = pci_resource_start(pdev, 0);
 237 #ifdef CS461X_FULL_MAP
 238         ba1_addr = pci_resource_start(pdev, 1);
 239 #endif
 240         if (ba0_addr == 0 || ba0_addr == ~0
 241 #ifdef CS461X_FULL_MAP
 242             || ba1_addr == 0 || ba1_addr == ~0
 243 #endif
 244             ) {
 245                 printk(KERN_ERR "cs461x: wrong address - ba0 = 0x%lx\n", ba0_addr);
 246 #ifdef CS461X_FULL_MAP
 247                 printk(KERN_ERR "cs461x: wrong address - ba1 = 0x%lx\n", ba1_addr);
 248 #endif
 249                 cs461x_free(pdev);
 250                 return -ENOMEM;
 251         }
 252
 253         ba0 = ioremap(ba0_addr, CS461X_BA0_SIZE);
 254 #ifdef CS461X_FULL_MAP
 255         ba1.name.data0 = ioremap(ba1_addr + BA1_SP_DMEM0, CS461X_BA1_DATA0_SIZE);
 256         ba1.name.data1 = ioremap(ba1_addr + BA1_SP_DMEM1, CS461X_BA1_DATA1_SIZE);
 257         ba1.name.pmem  = ioremap(ba1_addr + BA1_SP_PMEM, CS461X_BA1_PRG_SIZE);
 258         ba1.name.reg   = ioremap(ba1_addr + BA1_SP_REG, CS461X_BA1_REG_SIZE);
 259
 260         if (ba0 == NULL || ba1.name.data0 == NULL ||
 261             ba1.name.data1 == NULL || ba1.name.pmem == NULL ||
 262             ba1.name.reg == NULL) {
 263                 cs461x_free(pdev);
 264                 return -ENOMEM;
 265         }
 266 #else
 267         if (ba0 == NULL) {
 268                 cs461x_free(pdev);
 269                 return -ENOMEM;
 270         }
 271 #endif
 272
 273         if (!(port = gameport_allocate_port())) {
 274                 printk(KERN_ERR "cs461x: Memory allocation failed\n");
 275                 cs461x_free(pdev);
 276                 return -ENOMEM;
 277         }
 278
 279         pci_set_drvdata(pdev, port);
 280
 281         port->open = cs461x_gameport_open;
 282         port->trigger = cs461x_gameport_trigger;
 283         port->read = cs461x_gameport_read;
 284         port->cooked_read = cs461x_gameport_cooked_read;
 285
 286         gameport_set_name(port, "CS416x");
 287         gameport_set_phys(port, "pci%s/gameport0", pci_name(pdev));
 288         port->dev.parent = &pdev->dev;
 289
 290         cs461x_pokeBA0(BA0_JSIO, 0xFF); // ?
 291         cs461x_pokeBA0(BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
 292
 293         gameport_register_port(port);
 294
 295         return 0;
 296 }
 297
 298 static void __devexit cs461x_pci_remove(struct pci_dev *pdev)
 299 {
 300         cs461x_free(pdev);
 301 }
 302
 303 static struct pci_driver cs461x_pci_driver = {
 304         .name =         "CS461x_gameport",
 305         .id_table =     cs461x_pci_tbl,
 306         .probe =        cs461x_pci_probe,
 307         .remove =       __devexit_p(cs461x_pci_remove),
 308 };
 309
 310 static int __init cs461x_init(void)
 311 {
 312         return pci_register_driver(&cs461x_pci_driver);
 313 }
 314
 315 static void __exit cs461x_exit(void)
 316 {
 317         pci_unregister_driver(&cs461x_pci_driver);
 318 }
 319
 320 module_init(cs461x_init);
 321 module_exit(cs461x_exit);
 322