1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
323 lines
9.0 KiB
C
323 lines
9.0 KiB
C
/*
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The all defines and part of code (such as cs461x_*) are
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contributed from ALSA 0.5.8 sources.
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See http://www.alsa-project.org/ for sources
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Tested on Linux 686 2.4.0-test9, ALSA 0.5.8a and CS4610
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*/
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#include <asm/io.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/gameport.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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MODULE_AUTHOR("Victor Krapivin");
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MODULE_LICENSE("GPL");
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/*
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These options are experimental
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#define CS461X_FULL_MAP
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*/
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#ifndef PCI_VENDOR_ID_CIRRUS
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#define PCI_VENDOR_ID_CIRRUS 0x1013
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#endif
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#ifndef PCI_DEVICE_ID_CIRRUS_4610
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#define PCI_DEVICE_ID_CIRRUS_4610 0x6001
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#endif
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#ifndef PCI_DEVICE_ID_CIRRUS_4612
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#define PCI_DEVICE_ID_CIRRUS_4612 0x6003
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#endif
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#ifndef PCI_DEVICE_ID_CIRRUS_4615
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#define PCI_DEVICE_ID_CIRRUS_4615 0x6004
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#endif
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/* Registers */
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#define BA0_JSPT 0x00000480
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#define BA0_JSCTL 0x00000484
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#define BA0_JSC1 0x00000488
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#define BA0_JSC2 0x0000048C
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#define BA0_JSIO 0x000004A0
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/* Bits for JSPT */
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#define JSPT_CAX 0x00000001
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#define JSPT_CAY 0x00000002
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#define JSPT_CBX 0x00000004
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#define JSPT_CBY 0x00000008
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#define JSPT_BA1 0x00000010
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#define JSPT_BA2 0x00000020
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#define JSPT_BB1 0x00000040
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#define JSPT_BB2 0x00000080
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/* Bits for JSCTL */
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#define JSCTL_SP_MASK 0x00000003
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#define JSCTL_SP_SLOW 0x00000000
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#define JSCTL_SP_MEDIUM_SLOW 0x00000001
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#define JSCTL_SP_MEDIUM_FAST 0x00000002
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#define JSCTL_SP_FAST 0x00000003
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#define JSCTL_ARE 0x00000004
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/* Data register pairs masks */
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#define JSC1_Y1V_MASK 0x0000FFFF
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#define JSC1_X1V_MASK 0xFFFF0000
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#define JSC1_Y1V_SHIFT 0
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#define JSC1_X1V_SHIFT 16
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#define JSC2_Y2V_MASK 0x0000FFFF
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#define JSC2_X2V_MASK 0xFFFF0000
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#define JSC2_Y2V_SHIFT 0
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#define JSC2_X2V_SHIFT 16
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/* JS GPIO */
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#define JSIO_DAX 0x00000001
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#define JSIO_DAY 0x00000002
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#define JSIO_DBX 0x00000004
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#define JSIO_DBY 0x00000008
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#define JSIO_AXOE 0x00000010
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#define JSIO_AYOE 0x00000020
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#define JSIO_BXOE 0x00000040
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#define JSIO_BYOE 0x00000080
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/*
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The card initialization code is obfuscated; the module cs461x
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need to be loaded after ALSA modules initialized and something
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played on the CS 4610 chip (see sources for details of CS4610
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initialization code from ALSA)
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*/
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/* Card specific definitions */
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#define CS461X_BA0_SIZE 0x2000
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#define CS461X_BA1_DATA0_SIZE 0x3000
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#define CS461X_BA1_DATA1_SIZE 0x3800
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#define CS461X_BA1_PRG_SIZE 0x7000
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#define CS461X_BA1_REG_SIZE 0x0100
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#define BA1_SP_DMEM0 0x00000000
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#define BA1_SP_DMEM1 0x00010000
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#define BA1_SP_PMEM 0x00020000
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#define BA1_SP_REG 0x00030000
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#define BA1_DWORD_SIZE (13 * 1024 + 512)
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#define BA1_MEMORY_COUNT 3
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/*
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Only one CS461x card is still suppoted; the code requires
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redesign to avoid this limitatuion.
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*/
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static unsigned long ba0_addr;
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static unsigned int __iomem *ba0;
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#ifdef CS461X_FULL_MAP
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static unsigned long ba1_addr;
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static union ba1_t {
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struct {
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unsigned int __iomem *data0;
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unsigned int __iomem *data1;
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unsigned int __iomem *pmem;
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unsigned int __iomem *reg;
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} name;
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unsigned int __iomem *idx[4];
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} ba1;
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static void cs461x_poke(unsigned long reg, unsigned int val)
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{
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writel(val, &ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff]);
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}
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static unsigned int cs461x_peek(unsigned long reg)
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{
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return readl(&ba1.idx[(reg >> 16) & 3][(reg >> 2) & 0x3fff]);
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}
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#endif
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static void cs461x_pokeBA0(unsigned long reg, unsigned int val)
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{
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writel(val, &ba0[reg >> 2]);
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}
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static unsigned int cs461x_peekBA0(unsigned long reg)
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{
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return readl(&ba0[reg >> 2]);
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}
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static int cs461x_free(struct pci_dev *pdev)
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{
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struct gameport *port = pci_get_drvdata(pdev);
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if (port)
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gameport_unregister_port(port);
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if (ba0) iounmap(ba0);
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#ifdef CS461X_FULL_MAP
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if (ba1.name.data0) iounmap(ba1.name.data0);
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if (ba1.name.data1) iounmap(ba1.name.data1);
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if (ba1.name.pmem) iounmap(ba1.name.pmem);
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if (ba1.name.reg) iounmap(ba1.name.reg);
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#endif
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return 0;
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}
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static void cs461x_gameport_trigger(struct gameport *gameport)
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{
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cs461x_pokeBA0(BA0_JSPT, 0xFF); //outb(gameport->io, 0xFF);
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}
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static unsigned char cs461x_gameport_read(struct gameport *gameport)
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{
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return cs461x_peekBA0(BA0_JSPT); //inb(gameport->io);
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}
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static int cs461x_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
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{
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unsigned js1, js2, jst;
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js1 = cs461x_peekBA0(BA0_JSC1);
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js2 = cs461x_peekBA0(BA0_JSC2);
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jst = cs461x_peekBA0(BA0_JSPT);
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*buttons = (~jst >> 4) & 0x0F;
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axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
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axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
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axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
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axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
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for(jst=0;jst<4;++jst)
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if(axes[jst]==0xFFFF) axes[jst] = -1;
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return 0;
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}
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static int cs461x_gameport_open(struct gameport *gameport, int mode)
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{
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switch (mode) {
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case GAMEPORT_MODE_COOKED:
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case GAMEPORT_MODE_RAW:
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return 0;
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default:
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return -1;
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}
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return 0;
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}
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static struct pci_device_id cs461x_pci_tbl[] = {
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{ PCI_VENDOR_ID_CIRRUS, 0x6001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4610 */
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{ PCI_VENDOR_ID_CIRRUS, 0x6003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4612 */
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{ PCI_VENDOR_ID_CIRRUS, 0x6005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* Cirrus CS4615 */
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, cs461x_pci_tbl);
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static int __devinit cs461x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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int rc;
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struct gameport* port;
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rc = pci_enable_device(pdev);
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if (rc) {
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printk(KERN_ERR "cs461x: Cannot enable PCI gameport (bus %d, devfn %d) error=%d\n",
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pdev->bus->number, pdev->devfn, rc);
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return rc;
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}
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ba0_addr = pci_resource_start(pdev, 0);
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#ifdef CS461X_FULL_MAP
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ba1_addr = pci_resource_start(pdev, 1);
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#endif
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if (ba0_addr == 0 || ba0_addr == ~0
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#ifdef CS461X_FULL_MAP
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|| ba1_addr == 0 || ba1_addr == ~0
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#endif
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) {
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printk(KERN_ERR "cs461x: wrong address - ba0 = 0x%lx\n", ba0_addr);
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#ifdef CS461X_FULL_MAP
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printk(KERN_ERR "cs461x: wrong address - ba1 = 0x%lx\n", ba1_addr);
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#endif
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cs461x_free(pdev);
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return -ENOMEM;
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}
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ba0 = ioremap(ba0_addr, CS461X_BA0_SIZE);
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#ifdef CS461X_FULL_MAP
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ba1.name.data0 = ioremap(ba1_addr + BA1_SP_DMEM0, CS461X_BA1_DATA0_SIZE);
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ba1.name.data1 = ioremap(ba1_addr + BA1_SP_DMEM1, CS461X_BA1_DATA1_SIZE);
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ba1.name.pmem = ioremap(ba1_addr + BA1_SP_PMEM, CS461X_BA1_PRG_SIZE);
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ba1.name.reg = ioremap(ba1_addr + BA1_SP_REG, CS461X_BA1_REG_SIZE);
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if (ba0 == NULL || ba1.name.data0 == NULL ||
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ba1.name.data1 == NULL || ba1.name.pmem == NULL ||
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ba1.name.reg == NULL) {
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cs461x_free(pdev);
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return -ENOMEM;
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}
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#else
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if (ba0 == NULL) {
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cs461x_free(pdev);
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return -ENOMEM;
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}
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#endif
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if (!(port = gameport_allocate_port())) {
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printk(KERN_ERR "cs461x: Memory allocation failed\n");
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cs461x_free(pdev);
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return -ENOMEM;
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}
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pci_set_drvdata(pdev, port);
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port->open = cs461x_gameport_open;
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port->trigger = cs461x_gameport_trigger;
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port->read = cs461x_gameport_read;
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port->cooked_read = cs461x_gameport_cooked_read;
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gameport_set_name(port, "CS416x");
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gameport_set_phys(port, "pci%s/gameport0", pci_name(pdev));
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port->dev.parent = &pdev->dev;
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cs461x_pokeBA0(BA0_JSIO, 0xFF); // ?
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cs461x_pokeBA0(BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
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gameport_register_port(port);
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return 0;
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}
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static void __devexit cs461x_pci_remove(struct pci_dev *pdev)
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{
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cs461x_free(pdev);
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}
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static struct pci_driver cs461x_pci_driver = {
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.name = "CS461x_gameport",
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.id_table = cs461x_pci_tbl,
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.probe = cs461x_pci_probe,
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.remove = __devexit_p(cs461x_pci_remove),
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};
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static int __init cs461x_init(void)
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{
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return pci_register_driver(&cs461x_pci_driver);
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}
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static void __exit cs461x_exit(void)
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{
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pci_unregister_driver(&cs461x_pci_driver);
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}
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module_init(cs461x_init);
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module_exit(cs461x_exit);
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