cs461x.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:9k
- /*
- The all defines and part of code (such as cs461x_*) are
- contributed from ALSA 0.5.8 sources.
- See http://www.alsa-project.org/ for sources
-
- Tested on Linux 686 2.4.0-test9, ALSA 0.5.8a and CS4610
- */
- #include <asm/io.h>
- #include <linux/module.h>
- #include <linux/ioport.h>
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/gameport.h>
- #include <linux/slab.h>
- #include <linux/pci.h>
- MODULE_AUTHOR("Victor Krapivin <vik@belcaf.minsk.by>");
- MODULE_LICENSE("GPL");
- /*
- These options are experimental
- #define CS461X_FULL_MAP
- */
- #define COOKED_MODE
- #ifndef PCI_VENDOR_ID_CIRRUS
- #define PCI_VENDOR_ID_CIRRUS 0x1013
- #endif
- #ifndef PCI_DEVICE_ID_CIRRUS_4610
- #define PCI_DEVICE_ID_CIRRUS_4610 0x6001
- #endif
- #ifndef PCI_DEVICE_ID_CIRRUS_4612
- #define PCI_DEVICE_ID_CIRRUS_4612 0x6003
- #endif
- #ifndef PCI_DEVICE_ID_CIRRUS_4615
- #define PCI_DEVICE_ID_CIRRUS_4615 0x6004
- #endif
- /* Registers */
- #define BA0_JSPT 0x00000480
- #define BA0_JSCTL 0x00000484
- #define BA0_JSC1 0x00000488
- #define BA0_JSC2 0x0000048C
- #define BA0_JSIO 0x000004A0
- /* Bits for JSPT */
- #define JSPT_CAX 0x00000001
- #define JSPT_CAY 0x00000002
- #define JSPT_CBX 0x00000004
- #define JSPT_CBY 0x00000008
- #define JSPT_BA1 0x00000010
- #define JSPT_BA2 0x00000020
- #define JSPT_BB1 0x00000040
- #define JSPT_BB2 0x00000080
- /* Bits for JSCTL */
- #define JSCTL_SP_MASK 0x00000003
- #define JSCTL_SP_SLOW 0x00000000
- #define JSCTL_SP_MEDIUM_SLOW 0x00000001
- #define JSCTL_SP_MEDIUM_FAST 0x00000002
- #define JSCTL_SP_FAST 0x00000003
- #define JSCTL_ARE 0x00000004
- /* Data register pairs masks */
- #define JSC1_Y1V_MASK 0x0000FFFF
- #define JSC1_X1V_MASK 0xFFFF0000
- #define JSC1_Y1V_SHIFT 0
- #define JSC1_X1V_SHIFT 16
- #define JSC2_Y2V_MASK 0x0000FFFF
- #define JSC2_X2V_MASK 0xFFFF0000
- #define JSC2_Y2V_SHIFT 0
- #define JSC2_X2V_SHIFT 16
- /* JS GPIO */
- #define JSIO_DAX 0x00000001
- #define JSIO_DAY 0x00000002
- #define JSIO_DBX 0x00000004
- #define JSIO_DBY 0x00000008
- #define JSIO_AXOE 0x00000010
- #define JSIO_AYOE 0x00000020
- #define JSIO_BXOE 0x00000040
- #define JSIO_BYOE 0x00000080
- /*
- The card initialization code is obfuscated; the module cs461x
- need to be loaded after ALSA modules initialized and something
- played on the CS 4610 chip (see sources for details of CS4610
- initialization code from ALSA)
- */
- /* Card specific definitions */
- #define CS461X_BA0_SIZE 0x2000
- #define CS461X_BA1_DATA0_SIZE 0x3000
- #define CS461X_BA1_DATA1_SIZE 0x3800
- #define CS461X_BA1_PRG_SIZE 0x7000
- #define CS461X_BA1_REG_SIZE 0x0100
- #define BA1_SP_DMEM0 0x00000000
- #define BA1_SP_DMEM1 0x00010000
- #define BA1_SP_PMEM 0x00020000
- #define BA1_SP_REG 0x00030000
- #define BA1_DWORD_SIZE (13 * 1024 + 512)
- #define BA1_MEMORY_COUNT 3
- /*
- Only one CS461x card is still suppoted; the code requires
- redesign to avoid this limitatuion.
- */
- static unsigned long ba0_addr;
- static unsigned int *ba0;
- #ifdef CS461X_FULL_MAP
- static unsigned long ba1_addr;
- static union ba1_t {
- struct {
- unsigned int *data0;
- unsigned int *data1;
- unsigned int *pmem;
- unsigned int *reg;
- } name;
- unsigned int *idx[4];
- } ba1;
- static void cs461x_poke(unsigned long reg, unsigned int val)
- {
- ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff] = val;
- }
- static unsigned int cs461x_peek(unsigned long reg)
- {
- return ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff];
- }
- #endif
- static void cs461x_pokeBA0(unsigned long reg, unsigned int val)
- {
- ba0[reg >> 2] = val;
- }
- static unsigned int cs461x_peekBA0(unsigned long reg)
- {
- return ba0[reg >> 2];
- }
- static int cs461x_free(struct pci_dev *pdev)
- {
- struct gameport *port = pci_get_drvdata(pdev);
- if(port){
- gameport_unregister_port(port);
- kfree(port);
- }
- if (ba0) iounmap(ba0);
- #ifdef CS461X_FULL_MAP
- if (ba1.name.data0) iounmap(ba1.name.data0);
- if (ba1.name.data1) iounmap(ba1.name.data1);
- if (ba1.name.pmem) iounmap(ba1.name.pmem);
- if (ba1.name.reg) iounmap(ba1.name.reg);
- #endif
- return 0;
- }
- static void cs461x_gameport_trigger(struct gameport *gameport)
- {
- cs461x_pokeBA0(BA0_JSPT, 0xFF); //outb(gameport->io, 0xFF);
- }
- static unsigned char cs461x_gameport_read(struct gameport *gameport)
- {
- return cs461x_peekBA0(BA0_JSPT); //inb(gameport->io);
- }
- static int cs461x_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
- {
- unsigned js1, js2, jst;
-
- js1 = cs461x_peekBA0(BA0_JSC1);
- js2 = cs461x_peekBA0(BA0_JSC2);
- jst = cs461x_peekBA0(BA0_JSPT);
-
- *buttons = (~jst >> 4) & 0x0F;
-
- axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
- axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
- axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
- axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
- for(jst=0;jst<4;++jst)
- if(axes[jst]==0xFFFF) axes[jst] = -1;
- return 0;
- }
- static int cs461x_gameport_open(struct gameport *gameport, int mode)
- {
- switch (mode) {
- #ifdef COOKED_MODE
- case GAMEPORT_MODE_COOKED:
- return 0;
- #endif
- case GAMEPORT_MODE_RAW:
- return 0;
- default:
- return -1;
- }
- return 0;
- }
- static struct pci_device_id cs461x_pci_tbl[] __devinitdata = {
- { PCI_VENDOR_ID_CIRRUS, 0x6001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4610 */
- { PCI_VENDOR_ID_CIRRUS, 0x6003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4612 */
- { PCI_VENDOR_ID_CIRRUS, 0x6005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4615 */
- { 0, }
- };
- MODULE_DEVICE_TABLE(pci, cs461x_pci_tbl);
- static int __devinit cs461x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
- {
- int rc;
- struct gameport* port;
-
- rc = pci_enable_device(pdev);
- if (rc) {
- printk(KERN_ERR "cs461x: Cannot enable PCI gameport (bus %d, devfn %d) error=%dn",
- pdev->bus->number, pdev->devfn, rc);
- return rc;
- }
- ba0_addr = pci_resource_start(pdev, 0);
- #ifdef CS461X_FULL_MAP
- ba1_addr = pci_resource_start(pdev, 1);
- #endif
- if (ba0_addr == 0 || ba0_addr == ~0
- #ifdef CS461X_FULL_MAP
- || ba1_addr == 0 || ba1_addr == ~0
- #endif
- ) {
- printk(KERN_ERR "cs461x: wrong address - ba0 = 0x%lxn", ba0_addr);
- #ifdef CS461X_FULL_MAP
- printk(KERN_ERR "cs461x: wrong address - ba1 = 0x%lxn", ba1_addr);
- #endif
- cs461x_free(pdev);
- return -ENOMEM;
- }
- ba0 = ioremap(ba0_addr, CS461X_BA0_SIZE);
- #ifdef CS461X_FULL_MAP
- ba1.name.data0 = ioremap(ba1_addr + BA1_SP_DMEM0, CS461X_BA1_DATA0_SIZE);
- ba1.name.data1 = ioremap(ba1_addr + BA1_SP_DMEM1, CS461X_BA1_DATA1_SIZE);
- ba1.name.pmem = ioremap(ba1_addr + BA1_SP_PMEM, CS461X_BA1_PRG_SIZE);
- ba1.name.reg = ioremap(ba1_addr + BA1_SP_REG, CS461X_BA1_REG_SIZE);
- if (ba0 == NULL || ba1.name.data0 == NULL ||
- ba1.name.data1 == NULL || ba1.name.pmem == NULL ||
- ba1.name.reg == NULL) {
- cs461x_free(pdev);
- return -ENOMEM;
- }
- #else
- if (ba0 == NULL){
- cs461x_free(pdev);
- return -ENOMEM;
- }
- #endif
- printk(KERN_INFO "CS461x PCI: %lx[%d]n",
- ba0_addr, CS461X_BA0_SIZE);
-
- if (!(port = kmalloc(sizeof(struct gameport), GFP_KERNEL))) {
- printk(KERN_ERR "Memory allocation failed.n");
- cs461x_free(pdev);
- return -ENOMEM;
- }
- memset(port, 0, sizeof(struct gameport));
- pci_set_drvdata(pdev, port);
-
- port->open = cs461x_gameport_open;
- port->read = cs461x_gameport_read;
- port->trigger = cs461x_gameport_trigger;
- #ifdef COOKED_MODE
- port->cooked_read = cs461x_gameport_cooked_read;
- #endif
- cs461x_pokeBA0(BA0_JSIO, 0xFF); // ?
- cs461x_pokeBA0(BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
- gameport_register_port(port);
- printk(KERN_INFO "gameport%d: CS461x Gameport speed %d kHzn",
- port->number, port->speed);
- return 0;
- }
- static void __devexit cs461x_pci_remove(struct pci_dev *pdev)
- {
- cs461x_free(pdev);
- }
-
- static struct pci_driver cs461x_pci_driver = {
- name: "PCI Gameport",
- id_table: cs461x_pci_tbl,
- probe: cs461x_pci_probe,
- remove: __devexit_p(cs461x_pci_remove),
- };
- int __init js_cs461x_init(void)
- {
- return pci_module_init(&cs461x_pci_driver);
- }
- void __exit js_cs461x_exit(void)
- {
- pci_unregister_driver(&cs461x_pci_driver);
- }
- module_init(js_cs461x_init);
- module_exit(js_cs461x_exit);