^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * WAX Device Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (c) Copyright 2000 The Puffin Group Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * by Helge Deller <deller@gmx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/hardware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "gsc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static void wax_choose_irq(struct parisc_device *dev, void *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) switch (dev->id.sversion) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) case 0x73: irq = 1; break; /* i8042 General */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) case 0x8c: irq = 6; break; /* Serial */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) case 0x90: irq = 10; break; /* EISA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) default: return; /* Unknown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) gsc_asic_assign_irq(ctrl, irq, &dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) switch (dev->id.sversion) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case 0x73: irq = 2; break; /* i8042 High-priority */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) case 0x90: irq = 0; break; /* EISA NMI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) default: return; /* No secondary IRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) wax_init_irq(struct gsc_asic *wax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned long base = wax->hpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* Wax-off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) gsc_writel(0x00000000, base+OFFSET_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* clear pending interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) gsc_readl(base+OFFSET_IRR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* We're not really convinced we want to reset the onboard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * devices. Firmware does it for us...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Resets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) // gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) // gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int __init wax_init_chip(struct parisc_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct gsc_asic *wax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct parisc_device *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct gsc_irq gsc_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) wax = kzalloc(sizeof(*wax), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!wax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) wax->name = "wax";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) wax->hpa = dev->hpa.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) wax->version = 0; /* gsc_readb(wax->hpa+WAX_VER); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* Stop wax hissing for a bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) wax_init_irq(wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* the IRQ wax should use */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (dev->irq < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) printk(KERN_ERR "%s(): cannot get GSC irq\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) kfree(wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) kfree(wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* enable IRQ's for devices below WAX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /* Done init'ing, register this driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = gsc_common_setup(dev, wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) kfree(wax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) gsc_fixup_irqs(dev, wax, wax_choose_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) parent = parisc_parent(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (parent->id.hw_type != HPHW_IOA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) gsc_fixup_irqs(parent, wax, wax_choose_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static const struct parisc_device_id wax_tbl[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) { 0, }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_DEVICE_TABLE(parisc, wax_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct parisc_driver wax_driver __refdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .name = "wax",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .id_table = wax_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .probe = wax_init_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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