2 * This file is part of the coreboot project.
4 * Copyright (C) 2004 Linux Networx
5 * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
6 * Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
7 * Copyright (C) 2005 Tyan
8 * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2 of the License.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <console/console.h>
30 #include <device/device.h>
31 #include <device/pnp.h>
33 /* PNP fundamental operations */
35 void pnp_write_config(device_t dev, uint8_t reg, uint8_t value)
37 outb(reg, dev->path.pnp.port);
38 outb(value, dev->path.pnp.port + 1);
41 uint8_t pnp_read_config(device_t dev, uint8_t reg)
43 outb(reg, dev->path.pnp.port);
44 return inb(dev->path.pnp.port + 1);
47 void pnp_set_logical_device(device_t dev)
49 pnp_write_config(dev, 0x07, dev->path.pnp.device & 0xff);
52 void pnp_set_enable(device_t dev, int enable)
56 tmp = pnp_read_config(dev, 0x30);
57 /* handle the virtual devices, which share same LDN register */
58 bitpos = (dev->path.pnp.device >> 8) & 0x7;
63 tmp &= ~(1 << bitpos);
65 pnp_write_config(dev, 0x30, tmp);
68 int pnp_read_enable(device_t dev)
71 tmp = pnp_read_config(dev, 0x30);
72 /* handle the virtual devices, which share same LDN register */
73 bitpos = (dev->path.pnp.device >> 8) & 0x7;
74 return !!(tmp & (1 << bitpos));
77 void pnp_set_iobase(device_t dev, unsigned index, unsigned iobase)
79 /* Index == 0x60 or 0x62 */
80 pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
81 pnp_write_config(dev, index + 1, iobase & 0xff);
84 void pnp_set_irq(device_t dev, unsigned index, unsigned irq)
86 /* Index == 0x70 or 0x72 */
87 pnp_write_config(dev, index, irq);
90 void pnp_set_drq(device_t dev, unsigned index, unsigned drq)
93 pnp_write_config(dev, index, drq & 0xff);
96 /* PNP device operations */
98 void pnp_read_resources(device_t dev)
103 static void pnp_set_resource(device_t dev, struct resource *resource)
105 if (!(resource->flags & IORESOURCE_ASSIGNED)) {
106 printk_err("ERROR: %s %02lx %s size: 0x%010Lx not assigned\n",
107 dev_path(dev), resource->index,
108 resource_type(resource),
113 /* Now store the resource */
114 if (resource->flags & IORESOURCE_IO) {
115 pnp_set_iobase(dev, resource->index, resource->base);
117 else if (resource->flags & IORESOURCE_DRQ) {
118 pnp_set_drq(dev, resource->index, resource->base);
120 else if (resource->flags & IORESOURCE_IRQ) {
121 pnp_set_irq(dev, resource->index, resource->base);
124 printk_err("ERROR: %s %02lx unknown resource type\n",
125 dev_path(dev), resource->index);
128 resource->flags |= IORESOURCE_STORED;
130 report_resource_stored(dev, resource, "");
133 void pnp_set_resources(device_t dev)
137 /* Select the device */
138 pnp_set_logical_device(dev);
140 /* Paranoia says I should disable the device here... */
141 for(i = 0; i < dev->resources; i++) {
142 pnp_set_resource(dev, &dev->resource[i]);
146 void pnp_enable_resources(device_t dev)
148 pnp_set_logical_device(dev);
149 pnp_set_enable(dev, 1);
152 void pnp_enable(device_t dev)
155 pnp_set_logical_device(dev);
156 pnp_set_enable(dev, 0);
160 struct device_operations pnp_ops = {
161 .read_resources = pnp_read_resources,
162 .set_resources = pnp_set_resources,
163 .enable_resources = pnp_enable_resources,
164 .enable = pnp_enable,
167 /* PNP chip opertations */
169 static void pnp_get_ioresource(device_t dev, unsigned index, struct io_info *info)
171 struct resource *resource;
172 unsigned moving, gran, step;
174 resource = new_resource(dev, index);
176 /* Initilize the resource */
177 resource->limit = 0xffff;
178 resource->flags |= IORESOURCE_IO;
180 /* Get the resource size */
184 /* Find the first bit that moves */
185 while((moving & step) == 0) {
189 /* Now find the first bit that does not move */
190 while((moving & step) != 0) {
194 /* Of the moving bits the last bit in the first group,
195 * tells us the size of this resource.
197 if ((moving & step) == 0) {
201 /* Set the resource size and alignment */
202 resource->gran = gran;
203 resource->align = gran;
204 resource->limit = info->mask | (step - 1);
205 resource->size = 1 << gran;
208 static void get_resources(device_t dev, struct pnp_info *info)
210 struct resource *resource;
212 if (info->flags & PNP_IO0) {
213 pnp_get_ioresource(dev, PNP_IDX_IO0, &info->io0);
215 if (info->flags & PNP_IO1) {
216 pnp_get_ioresource(dev, PNP_IDX_IO1, &info->io1);
218 if (info->flags & PNP_IO2) {
219 pnp_get_ioresource(dev, PNP_IDX_IO2, &info->io2);
221 if (info->flags & PNP_IO3) {
222 pnp_get_ioresource(dev, PNP_IDX_IO3, &info->io3);
224 if (info->flags & PNP_IRQ0) {
225 resource = new_resource(dev, PNP_IDX_IRQ0);
227 resource->flags |= IORESOURCE_IRQ;
229 if (info->flags & PNP_IRQ1) {
230 resource = new_resource(dev, PNP_IDX_IRQ1);
232 resource->flags |= IORESOURCE_IRQ;
234 if (info->flags & PNP_DRQ0) {
235 resource = new_resource(dev, PNP_IDX_DRQ0);
237 resource->flags |= IORESOURCE_DRQ;
239 if (info->flags & PNP_DRQ1) {
240 resource = new_resource(dev, PNP_IDX_DRQ1);
242 resource->flags |= IORESOURCE_DRQ;
246 void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
247 unsigned functions, struct pnp_info *info)
249 struct device_path path;
253 path.type = DEVICE_PATH_PNP;
254 path.pnp.port = base_dev->path.pnp.port;
256 /* Setup the ops and resources on the newly allocated devices */
257 for(i = 0; i < functions; i++) {
258 /* Skip logical devices this Super I/O doesn't have. */
259 if (info[i].function == -1)
262 path.pnp.device = info[i].function;
263 dev = alloc_find_dev(base_dev->bus, &path);
265 /* Don't initialize a device multiple times */
269 if (info[i].ops == 0) {
272 dev->ops = info[i].ops;
274 get_resources(dev, &info[i]);