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, u8 reg, u8 value)
37 outb(reg, dev->path.pnp.port);
38 outb(value, dev->path.pnp.port + 1);
41 u8 pnp_read_config(device_t dev, u8 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);
58 /* Handle virtual devices, which share the same LDN register. */
59 bitpos = (dev->path.pnp.device >> 8) & 0x7;
64 tmp &= ~(1 << bitpos);
66 pnp_write_config(dev, 0x30, tmp);
69 int pnp_read_enable(device_t dev)
73 tmp = pnp_read_config(dev, 0x30);
75 /* Handle virtual devices, which share the same LDN register. */
76 bitpos = (dev->path.pnp.device >> 8) & 0x7;
78 return !!(tmp & (1 << bitpos));
81 void pnp_set_iobase(device_t dev, u8 index, u16 iobase)
83 /* Index == 0x60 or 0x62. */
84 pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
85 pnp_write_config(dev, index + 1, iobase & 0xff);
88 void pnp_set_irq(device_t dev, u8 index, u8 irq)
90 /* Index == 0x70 or 0x72. */
91 pnp_write_config(dev, index, irq);
94 void pnp_set_drq(device_t dev, u8 index, u8 drq)
97 pnp_write_config(dev, index, drq & 0xff);
100 /* PNP device operations */
102 void pnp_read_resources(device_t dev)
107 static void pnp_set_resource(device_t dev, struct resource *resource)
109 if (!(resource->flags & IORESOURCE_ASSIGNED)) {
110 printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010llx "
111 "not assigned\n", dev_path(dev), resource->index,
112 resource_type(resource), resource->size);
116 /* Now store the resource. */
117 if (resource->flags & IORESOURCE_IO) {
118 pnp_set_iobase(dev, resource->index, resource->base);
119 } else if (resource->flags & IORESOURCE_DRQ) {
120 pnp_set_drq(dev, resource->index, resource->base);
121 } else if (resource->flags & IORESOURCE_IRQ) {
122 pnp_set_irq(dev, resource->index, resource->base);
124 printk(BIOS_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)
135 struct resource *res;
137 /* Select the logical device (LDN). */
138 pnp_set_logical_device(dev);
140 /* Paranoia says I should disable the device here... */
141 for (res = dev->resource_list; res; res = res->next)
142 pnp_set_resource(dev, res);
145 void pnp_enable_resources(device_t dev)
147 pnp_set_logical_device(dev);
148 pnp_set_enable(dev, 1);
151 void pnp_enable(device_t dev)
154 pnp_set_logical_device(dev);
155 pnp_set_enable(dev, 0);
159 struct device_operations pnp_ops = {
160 .read_resources = pnp_read_resources,
161 .set_resources = pnp_set_resources,
162 .enable_resources = pnp_enable_resources,
163 .enable = pnp_enable,
166 /* PNP chip operations */
168 static void pnp_get_ioresource(device_t dev, u8 index, struct io_info *info)
170 struct resource *resource;
171 unsigned moving, gran, step;
174 printk(BIOS_ERR, "ERROR: device %s index %d has no mask.\n",
175 dev_path(dev), index);
179 resource = new_resource(dev, index);
181 /* Initilize the resource. */
182 resource->limit = 0xffff;
183 resource->flags |= IORESOURCE_IO;
185 /* Get the resource size... */
191 /* Find the first bit that moves. */
192 while ((moving & step) == 0) {
197 /* Now find the first bit that does not move. */
198 while ((moving & step) != 0) {
204 * Of the moving bits the last bit in the first group,
205 * tells us the size of this resource.
207 if ((moving & step) == 0) {
212 /* Set the resource size and alignment. */
213 resource->gran = gran;
214 resource->align = gran;
215 resource->limit = info->mask | (step - 1);
216 resource->size = 1 << gran;
219 static void get_resources(device_t dev, struct pnp_info *info)
221 struct resource *resource;
223 if (info->flags & PNP_IO0)
224 pnp_get_ioresource(dev, PNP_IDX_IO0, &info->io0);
225 if (info->flags & PNP_IO1)
226 pnp_get_ioresource(dev, PNP_IDX_IO1, &info->io1);
227 if (info->flags & PNP_IO2)
228 pnp_get_ioresource(dev, PNP_IDX_IO2, &info->io2);
229 if (info->flags & PNP_IO3)
230 pnp_get_ioresource(dev, PNP_IDX_IO3, &info->io3);
232 if (info->flags & PNP_IRQ0) {
233 resource = new_resource(dev, PNP_IDX_IRQ0);
235 resource->flags |= IORESOURCE_IRQ;
237 if (info->flags & PNP_IRQ1) {
238 resource = new_resource(dev, PNP_IDX_IRQ1);
240 resource->flags |= IORESOURCE_IRQ;
243 if (info->flags & PNP_DRQ0) {
244 resource = new_resource(dev, PNP_IDX_DRQ0);
246 resource->flags |= IORESOURCE_DRQ;
248 if (info->flags & PNP_DRQ1) {
249 resource = new_resource(dev, PNP_IDX_DRQ1);
251 resource->flags |= IORESOURCE_DRQ;
255 * These are not IRQs, but set the flag to have the
256 * resource allocator do the right thing.
258 if (info->flags & PNP_EN) {
259 resource = new_resource(dev, PNP_IDX_EN);
261 resource->flags |= IORESOURCE_IRQ;
263 if (info->flags & PNP_MSC0) {
264 resource = new_resource(dev, PNP_IDX_MSC0);
266 resource->flags |= IORESOURCE_IRQ;
268 if (info->flags & PNP_MSC1) {
269 resource = new_resource(dev, PNP_IDX_MSC1);
271 resource->flags |= IORESOURCE_IRQ;
275 void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
276 unsigned int functions, struct pnp_info *info)
278 struct device_path path;
282 path.type = DEVICE_PATH_PNP;
283 path.pnp.port = base_dev->path.pnp.port;
285 /* Setup the ops and resources on the newly allocated devices. */
286 for (i = 0; i < functions; i++) {
287 /* Skip logical devices this Super I/O doesn't have. */
288 if (info[i].function == -1)
291 path.pnp.device = info[i].function;
292 dev = alloc_find_dev(base_dev->bus, &path);
294 /* Don't initialize a device multiple times. */
298 if (info[i].ops == 0)
301 dev->ops = info[i].ops;
303 get_resources(dev, &info[i]);