patch-2.4.4 linux/drivers/char/joystick/cs461x.c

• Lines: 332
• Date: Wed Apr 11 19:02:30 2001
• Orig file: v2.4.3/linux/drivers/char/joystick/cs461x.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/char/joystick/cs461x.c linux/drivers/char/joystick/cs461x.c
@@ -0,0 +1,331 @@
+/*
+	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/init.h>
+#include <linux/gameport.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+
+MODULE_AUTHOR("Victor Krapivin <vik@belcaf.minsk.by>");
+
+/*
+	These options are experimental
+
+#define COOKED_MODE
+#define CS461X_FULL_MAP
+
+*/
+
+#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 = (struct gameport *)pdev->driver_data;
+	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));
+
+	port->io = -1;
+	port->size = -1;
+	pdev->driver_data = 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 PCI", port->number);
+	if (port->size > 1) printk(" size %d", port->size);
+	printk(" speed %d kHz\n", 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:         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);
+