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/*
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=%d\n",
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%lx\n", ba0_addr);
#ifdef CS461X_FULL_MAP
printk(KERN_ERR "cs461x: wrong address - ba1 = 0x%lx\n", 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 kHz\n",
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);
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