1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Manuel Jander. 4 * 5 * Based on the work of: 6 * Vojtech Pavlik 7 * Raymond Ingles 8 * 9 * Should you need to contact me, the author, you can do so either by 10 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail: 11 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic 12 * 13 * Based 90% on Vojtech Pavlik pcigame driver. 14 * Merged and modified by Manuel Jander, for the OpenVortex 15 * driver. (email: mjander@embedded.cl). 16 */ 17 18 #include <linux/time.h> 19 #include <linux/delay.h> 20 #include <linux/init.h> 21 #include <sound/core.h> 22 #include "au88x0.h" 23 #include <linux/gameport.h> 24 #include <linux/export.h> 25 26 #if IS_REACHABLE(CONFIG_GAMEPORT) 27 28 #define VORTEX_GAME_DWAIT 20 /* 20 ms */ 29 30 static unsigned char vortex_game_read(struct gameport *gameport) 31 { 32 vortex_t *vortex = gameport_get_port_data(gameport); 33 return hwread(vortex->mmio, VORTEX_GAME_LEGACY); 34 } 35 36 static void vortex_game_trigger(struct gameport *gameport) 37 { 38 vortex_t *vortex = gameport_get_port_data(gameport); 39 hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff); 40 } 41 42 static int 43 vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons) 44 { 45 vortex_t *vortex = gameport_get_port_data(gameport); 46 int i; 47 48 *buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf; 49 50 for (i = 0; i < 4; i++) { 51 axes[i] = 52 hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE)); 53 if (axes[i] == AXIS_RANGE) 54 axes[i] = -1; 55 } 56 return 0; 57 } 58 59 static int vortex_game_open(struct gameport *gameport, int mode) 60 { 61 vortex_t *vortex = gameport_get_port_data(gameport); 62 63 switch (mode) { 64 case GAMEPORT_MODE_COOKED: 65 hwwrite(vortex->mmio, VORTEX_CTRL2, 66 hwread(vortex->mmio, 67 VORTEX_CTRL2) | CTRL2_GAME_ADCMODE); 68 msleep(VORTEX_GAME_DWAIT); 69 return 0; 70 case GAMEPORT_MODE_RAW: 71 hwwrite(vortex->mmio, VORTEX_CTRL2, 72 hwread(vortex->mmio, 73 VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE); 74 return 0; 75 default: 76 return -1; 77 } 78 79 return 0; 80 } 81 82 static int vortex_gameport_register(vortex_t *vortex) 83 { 84 struct gameport *gp; 85 86 vortex->gameport = gp = gameport_allocate_port(); 87 if (!gp) { 88 dev_err(vortex->card->dev, 89 "cannot allocate memory for gameport\n"); 90 return -ENOMEM; 91 } 92 93 gameport_set_name(gp, "AU88x0 Gameport"); 94 gameport_set_phys(gp, "pci%s/gameport0", pci_name(vortex->pci_dev)); 95 gameport_set_dev_parent(gp, &vortex->pci_dev->dev); 96 97 gp->read = vortex_game_read; 98 gp->trigger = vortex_game_trigger; 99 gp->cooked_read = vortex_game_cooked_read; 100 gp->open = vortex_game_open; 101 102 gameport_set_port_data(gp, vortex); 103 gp->fuzz = 64; 104 105 gameport_register_port(gp); 106 107 return 0; 108 } 109 110 static void vortex_gameport_unregister(vortex_t * vortex) 111 { 112 if (vortex->gameport) { 113 gameport_unregister_port(vortex->gameport); 114 vortex->gameport = NULL; 115 } 116 } 117 118 #else 119 static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; } 120 static inline void vortex_gameport_unregister(vortex_t * vortex) { } 121 #endif 122