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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a88b5ba8bd
o Move all files from sparc64/kernel/ to sparc/kernel - rename as appropriate o Update sparc/Makefile to the changes o Update sparc/kernel/Makefile to include the sparc64 files NOTE: This commit changes link order on sparc64! Link order had to change for either of sparc32 and sparc64. And assuming sparc64 see more testing than sparc32 change link order on sparc64 where issues will be caught faster. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
150 lines
3.1 KiB
C
150 lines
3.1 KiB
C
/* auxio.c: Probing for the Sparc AUXIO register at boot time.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*
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* Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/of_device.h>
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#include <asm/prom.h>
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#include <asm/io.h>
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#include <asm/auxio.h>
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void __iomem *auxio_register = NULL;
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EXPORT_SYMBOL(auxio_register);
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enum auxio_type {
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AUXIO_TYPE_NODEV,
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AUXIO_TYPE_SBUS,
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AUXIO_TYPE_EBUS
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};
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static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
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static DEFINE_SPINLOCK(auxio_lock);
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static void __auxio_rmw(u8 bits_on, u8 bits_off, int ebus)
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{
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if (auxio_register) {
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unsigned long flags;
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u8 regval, newval;
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spin_lock_irqsave(&auxio_lock, flags);
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regval = (ebus ?
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(u8) readl(auxio_register) :
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sbus_readb(auxio_register));
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newval = regval | bits_on;
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newval &= ~bits_off;
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if (!ebus)
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newval &= ~AUXIO_AUX1_MASK;
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if (ebus)
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writel((u32) newval, auxio_register);
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else
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sbus_writeb(newval, auxio_register);
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spin_unlock_irqrestore(&auxio_lock, flags);
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}
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}
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static void __auxio_set_bit(u8 bit, int on, int ebus)
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{
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u8 bits_on = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
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u8 bits_off = 0;
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if (!on) {
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u8 tmp = bits_off;
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bits_off = bits_on;
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bits_on = tmp;
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}
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__auxio_rmw(bits_on, bits_off, ebus);
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}
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void auxio_set_led(int on)
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{
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int ebus = auxio_devtype == AUXIO_TYPE_EBUS;
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u8 bit;
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bit = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
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__auxio_set_bit(bit, on, ebus);
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}
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static void __auxio_sbus_set_lte(int on)
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{
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__auxio_set_bit(AUXIO_AUX1_LTE, on, 0);
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}
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void auxio_set_lte(int on)
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{
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switch(auxio_devtype) {
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case AUXIO_TYPE_SBUS:
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__auxio_sbus_set_lte(on);
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break;
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case AUXIO_TYPE_EBUS:
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/* FALL-THROUGH */
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default:
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break;
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}
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}
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static struct of_device_id __initdata auxio_match[] = {
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{
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.name = "auxio",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, auxio_match);
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static int __devinit auxio_probe(struct of_device *dev, const struct of_device_id *match)
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{
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struct device_node *dp = dev->node;
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unsigned long size;
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if (!strcmp(dp->parent->name, "ebus")) {
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auxio_devtype = AUXIO_TYPE_EBUS;
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size = sizeof(u32);
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} else if (!strcmp(dp->parent->name, "sbus")) {
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auxio_devtype = AUXIO_TYPE_SBUS;
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size = 1;
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} else {
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printk("auxio: Unknown parent bus type [%s]\n",
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dp->parent->name);
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return -ENODEV;
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}
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auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
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if (!auxio_register)
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return -ENODEV;
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printk(KERN_INFO "AUXIO: Found device at %s\n",
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dp->full_name);
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if (auxio_devtype == AUXIO_TYPE_EBUS)
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auxio_set_led(AUXIO_LED_ON);
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return 0;
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}
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static struct of_platform_driver auxio_driver = {
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.match_table = auxio_match,
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.probe = auxio_probe,
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.driver = {
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.name = "auxio",
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},
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};
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static int __init auxio_init(void)
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{
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return of_register_driver(&auxio_driver, &of_platform_bus_type);
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}
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/* Must be after subsys_initcall() so that busses are probed. Must
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* be before device_initcall() because things like the floppy driver
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* need to use the AUXIO register.
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*/
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fs_initcall(auxio_init);
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