diff options
Diffstat (limited to 'drivers/parisc/asp.c')
| -rw-r--r-- | drivers/parisc/asp.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/parisc/asp.c b/drivers/parisc/asp.c new file mode 100644 index 0000000000..32af8f0957 --- /dev/null +++ b/drivers/parisc/asp.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ASP Device Driver + * + * (c) Copyright 2000 The Puffin Group Inc. + * + * (c) 2000-2023 by Helge Deller <deller@gmx.de> + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/types.h> +#include <asm/io.h> +#include <asm/led.h> + +#include "gsc.h" + +#define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */ + +#define ASP_VER_OFFSET 0x20 /* offset of ASP version */ + +#define ASP_LED_ADDR 0xf0800020 + +#define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */ + +static struct gsc_asic asp; + +static void asp_choose_irq(struct parisc_device *dev, void *ctrl) +{ + int irq; + + switch (dev->id.sversion) { + case 0x71: irq = 9; break; /* SCSI */ + case 0x72: irq = 8; break; /* LAN */ + case 0x73: irq = 1; break; /* HIL */ + case 0x74: irq = 7; break; /* Centronics */ + case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */ + case 0x76: irq = 10; break; /* EISA BA */ + case 0x77: irq = 11; break; /* Graphics1 */ + case 0x7a: irq = 13; break; /* Audio (Bushmaster) */ + case 0x7b: irq = 13; break; /* Audio (Scorpio) */ + case 0x7c: irq = 3; break; /* FW SCSI */ + case 0x7d: irq = 4; break; /* FDDI */ + case 0x7f: irq = 13; break; /* Audio (Outfield) */ + default: return; /* Unknown */ + } + + gsc_asic_assign_irq(ctrl, irq, &dev->irq); + + switch (dev->id.sversion) { + case 0x73: irq = 2; break; /* i8042 High-priority */ + case 0x76: irq = 0; break; /* EISA BA */ + default: return; /* Other */ + } + + gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); +} + +/* There are two register ranges we're interested in. Interrupt / + * Status / LED are at 0xf080xxxx and Asp special registers are at + * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for + * the purposes of interrupt handling, we have to tell other bits of + * the kernel to look at the other registers. + */ +#define ASP_INTERRUPT_ADDR 0xf0800000 + +static int __init asp_init_chip(struct parisc_device *dev) +{ + struct gsc_irq gsc_irq; + int ret; + + asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf; + asp.name = (asp.version == 1) ? "Asp" : "Cutoff"; + asp.hpa = ASP_INTERRUPT_ADDR; + + printk(KERN_INFO "%s version %d at 0x%lx found.\n", + asp.name, asp.version, (unsigned long)dev->hpa.start); + + /* the IRQ ASP should use */ + ret = -EBUSY; + dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ); + if (dev->irq < 0) { + printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); + goto out; + } + + asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; + + ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp); + if (ret < 0) + goto out; + + /* Program VIPER to interrupt on the ASP irq */ + gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD); + + /* Done init'ing, register this driver */ + ret = gsc_common_setup(dev, &asp); + if (ret) + goto out; + + gsc_fixup_irqs(dev, &asp, asp_choose_irq); + /* Mongoose is a sibling of Asp, not a child... */ + gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq); + + /* initialize the chassis LEDs */ +#ifdef CONFIG_CHASSIS_LCD_LED + register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, + ASP_LED_ADDR); +#endif + + out: + return ret; +} + +static const struct parisc_device_id asp_tbl[] __initconst = { + { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, + { 0, } +}; +MODULE_DEVICE_TABLE(parisc, asp_tbl); + +static struct parisc_driver asp_driver __refdata = { + .name = "asp", + .id_table = asp_tbl, + .probe = asp_init_chip, +}; + +static int __init asp_init(void) +{ + return register_parisc_driver(&asp_driver); +} +arch_initcall(asp_init); |