Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/pnp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/bitmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "base.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) DEFINE_MUTEX(pnp_res_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static struct resource *pnp_find_resource(struct pnp_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 					  unsigned char rule,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 					  unsigned long type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 					  unsigned int bar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct resource *res = pnp_get_resource(dev, type, bar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	/* when the resource already exists, set its resource bits from rule */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		res->flags &= ~IORESOURCE_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		res->flags |= rule & IORESOURCE_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct resource *res, local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	res = pnp_find_resource(dev, rule->flags, IORESOURCE_IO, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		pnp_dbg(&dev->dev, "  io %d already set to %#llx-%#llx "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 			"flags %#lx\n", idx, (unsigned long long) res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 			(unsigned long long) res->end, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	res = &local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	res->flags = rule->flags | IORESOURCE_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	res->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	res->end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (!rule->size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		pnp_dbg(&dev->dev, "  io %d disabled\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	res->start = rule->min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	res->end = res->start + rule->size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	while (!pnp_check_port(dev, res)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		res->start += rule->align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		res->end = res->start + rule->size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		if (res->start > rule->max || !rule->align) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			pnp_dbg(&dev->dev, "  couldn't assign io %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 				"(min %#llx max %#llx)\n", idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				(unsigned long long) rule->min,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 				(unsigned long long) rule->max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) __add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	pnp_add_io_resource(dev, res->start, res->end, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct resource *res, local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	res = pnp_find_resource(dev, rule->flags, IORESOURCE_MEM, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		pnp_dbg(&dev->dev, "  mem %d already set to %#llx-%#llx "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			"flags %#lx\n", idx, (unsigned long long) res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			(unsigned long long) res->end, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	res = &local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	res->flags = rule->flags | IORESOURCE_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	res->start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	res->end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	/* ??? rule->flags restricted to 8 bits, all tests bogus ??? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		res->flags |= IORESOURCE_READONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		res->flags |= IORESOURCE_RANGELENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		res->flags |= IORESOURCE_SHADOWABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (!rule->size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		pnp_dbg(&dev->dev, "  mem %d disabled\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	res->start = rule->min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	res->end = res->start + rule->size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	while (!pnp_check_mem(dev, res)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		res->start += rule->align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		res->end = res->start + rule->size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		if (res->start > rule->max || !rule->align) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			pnp_dbg(&dev->dev, "  couldn't assign mem %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 				"(min %#llx max %#llx)\n", idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 				(unsigned long long) rule->min,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 				(unsigned long long) rule->max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) __add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	pnp_add_mem_resource(dev, res->start, res->end, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct resource *res, local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/* IRQ priority: this table is good for i386 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	static unsigned short xtab[16] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	res = pnp_find_resource(dev, rule->flags, IORESOURCE_IRQ, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		pnp_dbg(&dev->dev, "  irq %d already set to %d flags %#lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			idx, (int) res->start, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	res = &local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	res->flags = rule->flags | IORESOURCE_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	res->start = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	res->end = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (bitmap_empty(rule->map.bits, PNP_IRQ_NR)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		pnp_dbg(&dev->dev, "  irq %d disabled\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	/* TBD: need check for >16 IRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	res->start = find_next_bit(rule->map.bits, PNP_IRQ_NR, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (res->start < PNP_IRQ_NR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		res->end = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	for (i = 0; i < 16; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		if (test_bit(xtab[i], rule->map.bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			res->start = res->end = xtab[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			if (pnp_check_irq(dev, res))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 				goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (rule->flags & IORESOURCE_IRQ_OPTIONAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		res->start = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		res->end = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		pnp_dbg(&dev->dev, "  irq %d disabled (optional)\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	pnp_dbg(&dev->dev, "  couldn't assign irq %d\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) __add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	pnp_add_irq_resource(dev, res->start, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #ifdef CONFIG_ISA_DMA_API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct resource *res, local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	/* DMA priority: this table is good for i386 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	static unsigned short xtab[8] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		1, 3, 5, 6, 7, 0, 2, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	res = pnp_find_resource(dev, rule->flags, IORESOURCE_DMA, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		pnp_dbg(&dev->dev, "  dma %d already set to %d flags %#lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			idx, (int) res->start, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	res = &local_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	res->flags = rule->flags | IORESOURCE_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	res->start = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	res->end = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (!rule->map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		pnp_dbg(&dev->dev, "  dma %d disabled\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	for (i = 0; i < 8; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		if (rule->map & (1 << xtab[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			res->start = res->end = xtab[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			if (pnp_check_dma(dev, res))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				goto __add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	pnp_dbg(&dev->dev, "  couldn't assign dma %d\n", idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) __add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	pnp_add_dma_resource(dev, res->start, res->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) #endif /* CONFIG_ISA_DMA_API */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) void pnp_init_resources(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	pnp_free_resources(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static void pnp_clean_resource_table(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	struct pnp_resource *pnp_res, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		if (pnp_res->res.flags & IORESOURCE_AUTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			pnp_free_resource(pnp_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  * pnp_assign_resources - assigns resources to the device based on the specified dependent number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)  * @set: the dependent function number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int pnp_assign_resources(struct pnp_dev *dev, int set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct pnp_option *option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	int nport = 0, nmem = 0, nirq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int ndma __maybe_unused = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	pnp_dbg(&dev->dev, "pnp_assign_resources, try dependent set %d\n", set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	mutex_lock(&pnp_res_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	pnp_clean_resource_table(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	list_for_each_entry(option, &dev->options, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		if (pnp_option_is_dependent(option) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		    pnp_option_set(option) != set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		switch (option->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		case IORESOURCE_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			ret = pnp_assign_port(dev, &option->u.port, nport++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		case IORESOURCE_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			ret = pnp_assign_mem(dev, &option->u.mem, nmem++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		case IORESOURCE_IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			ret = pnp_assign_irq(dev, &option->u.irq, nirq++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) #ifdef CONFIG_ISA_DMA_API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		case IORESOURCE_DMA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			ret = pnp_assign_dma(dev, &option->u.dma, ndma++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	mutex_unlock(&pnp_res_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		pnp_dbg(&dev->dev, "pnp_assign_resources failed (%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		pnp_clean_resource_table(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		dbg_pnp_show_resources(dev, "pnp_assign_resources succeeded");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  * pnp_auto_config_dev - automatically assigns resources to a device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int pnp_auto_config_dev(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	if (!pnp_can_configure(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		pnp_dbg(&dev->dev, "configuration not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	ret = pnp_assign_resources(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	for (i = 1; i < dev->num_dependent_sets; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		ret = pnp_assign_resources(dev, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	dev_err(&dev->dev, "unable to assign resources\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)  * pnp_start_dev - low-level start of the PnP device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)  * assumes that resources have already been allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) int pnp_start_dev(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	if (!pnp_can_write(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		pnp_dbg(&dev->dev, "activation not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	dbg_pnp_show_resources(dev, "pnp_start_dev");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (dev->protocol->set(dev) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		dev_err(&dev->dev, "activation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	dev_info(&dev->dev, "activated\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)  * pnp_stop_dev - low-level disable of the PnP device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)  * does not free resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) int pnp_stop_dev(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	if (!pnp_can_disable(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		pnp_dbg(&dev->dev, "disabling not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	if (dev->protocol->disable(dev) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		dev_err(&dev->dev, "disable failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	dev_info(&dev->dev, "disabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)  * pnp_activate_dev - activates a PnP device for use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)  * does not validate or set resources so be careful.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) int pnp_activate_dev(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	if (dev->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	/* ensure resources are allocated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	if (pnp_auto_config_dev(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	error = pnp_start_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	dev->active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)  * pnp_disable_dev - disables device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)  * @dev: pointer to the desired device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)  * inform the correct pnp protocol so that resources can be used by other devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) int pnp_disable_dev(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	if (!dev->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	error = pnp_stop_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	dev->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	/* release the resources so that other devices can use them */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	mutex_lock(&pnp_res_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	pnp_clean_resource_table(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	mutex_unlock(&pnp_res_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) EXPORT_SYMBOL(pnp_start_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) EXPORT_SYMBOL(pnp_stop_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) EXPORT_SYMBOL(pnp_activate_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) EXPORT_SYMBOL(pnp_disable_dev);