2 * This file is part of the coreboot project.
4 * Copyright (C) 2000 AG Electronics Ltd.
5 * Copyright (C) 2003-2004 Linux Networx
6 * Copyright (C) 2004 Tyan
7 * Copyright (C) 2005 Digital Design Corporation
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
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 /* RAM-based driver for SMSC LPC47N217 Super I/O chip. */
27 #include <device/device.h>
28 #include <device/pnp.h>
29 #include <console/console.h>
30 #include <device/smbus.h>
37 #include "lpc47n217.h"
39 /* Forward declarations */
40 static void enable_dev(device_t dev);
41 static void lpc47n217_pnp_set_resources(device_t dev);
42 static void lpc47n217_pnp_enable_resources(device_t dev);
43 static void lpc47n217_pnp_enable(device_t dev);
44 static void lpc47n217_init(device_t dev);
45 static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource);
46 static void lpc47n217_pnp_set_iobase(device_t dev, u16 iobase);
47 static void lpc47n217_pnp_set_drq(device_t dev, u8 drq);
48 static void lpc47n217_pnp_set_irq(device_t dev, u8 irq);
49 static void lpc47n217_pnp_set_enable(device_t dev, int enable);
50 static void pnp_enter_conf_state(device_t dev);
51 static void pnp_exit_conf_state(device_t dev);
53 struct chip_operations superio_smsc_lpc47n217_ops = {
54 CHIP_NAME("SMSC LPC47N217 Super I/O")
55 .enable_dev = enable_dev,
58 static struct device_operations ops = {
59 .read_resources = pnp_read_resources,
60 .set_resources = lpc47n217_pnp_set_resources,
61 .enable_resources = lpc47n217_pnp_enable_resources,
62 .enable = lpc47n217_pnp_enable,
63 .init = lpc47n217_init,
66 static struct pnp_info pnp_dev_info[] = {
67 { &ops, LPC47N217_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, {0x07f8, 0}, },
68 { &ops, LPC47N217_SP1, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, },
69 { &ops, LPC47N217_SP2, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, }
73 * Create device structures and allocate resources to devices specified in the
74 * pnp_dev_info array (above).
76 * @param dev Pointer to structure describing a Super I/O device.
78 static void enable_dev(device_t dev)
80 pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info),
85 * Configure the specified Super I/O device with the resources (I/O space,
86 * etc.) that have been allocate for it.
88 * NOTE: Cannot use pnp_set_resources() here because it assumes chip
89 * support for logical devices, which the LPC47N217 doesn't have.
91 * @param dev Pointer to structure describing a Super I/O device.
93 static void lpc47n217_pnp_set_resources(device_t dev)
97 pnp_enter_conf_state(dev);
98 for (res = dev->resource_list; res; res = res->next)
99 lpc47n217_pnp_set_resource(dev, res);
100 /* dump_pnp_device(dev); */
101 pnp_exit_conf_state(dev);
105 * NOTE: Cannot use pnp_enable_resources() here because it assumes chip
106 * support for logical devices, which the LPC47N217 doesn't have.
108 static void lpc47n217_pnp_enable_resources(device_t dev)
110 pnp_enter_conf_state(dev);
111 lpc47n217_pnp_set_enable(dev, 1);
112 pnp_exit_conf_state(dev);
116 * NOTE: Cannot use pnp_set_enable() here because it assumes chip
117 * support for logical devices, which the LPC47N217 doesn't have.
119 static void lpc47n217_pnp_enable(device_t dev)
121 pnp_enter_conf_state(dev);
122 lpc47n217_pnp_set_enable(dev, !!dev->enabled);
123 pnp_exit_conf_state(dev);
127 * Initialize the specified Super I/O device.
129 * Devices other than COM ports are ignored. For COM ports, we configure the
132 * @param dev Pointer to structure describing a Super I/O device.
134 static void lpc47n217_init(device_t dev)
136 struct superio_smsc_lpc47n217_config* conf = dev->chip_info;
142 static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource)
144 if (!(resource->flags & IORESOURCE_ASSIGNED)) {
145 printk(BIOS_ERR, "ERROR: %s %02x not allocated\n",
146 dev_path(dev), resource->index);
150 /* Now store the resource. */
153 * NOTE: Cannot use pnp_set_XXX() here because they assume chip
154 * support for logical devices, which the LPC47N217 doesn't have.
156 if (resource->flags & IORESOURCE_IO) {
157 lpc47n217_pnp_set_iobase(dev, resource->base);
158 } else if (resource->flags & IORESOURCE_DRQ) {
159 lpc47n217_pnp_set_drq(dev, resource->base);
160 } else if (resource->flags & IORESOURCE_IRQ) {
161 lpc47n217_pnp_set_irq(dev, resource->base);
163 printk(BIOS_ERR, "ERROR: %s %02x unknown resource type\n",
164 dev_path(dev), resource->index);
167 resource->flags |= IORESOURCE_STORED;
169 report_resource_stored(dev, resource, "");
172 static void lpc47n217_pnp_set_iobase(device_t dev, u16 iobase)
174 ASSERT(!(iobase & 0x3));
176 switch(dev->path.pnp.device) {
178 pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff);
181 pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff);
184 pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff);
192 static void lpc47n217_pnp_set_drq(device_t dev, u8 drq)
194 const u8 PP_DMA_MASK = 0x0F;
195 const u8 PP_DMA_SELECTION_REGISTER = 0x26;
196 u8 current_config, new_config;
198 if (dev->path.pnp.device == LPC47N217_PP) {
199 current_config = pnp_read_config(dev,
200 PP_DMA_SELECTION_REGISTER);
201 ASSERT(!(drq & ~PP_DMA_MASK)); /* DRQ out of range? */
202 new_config = (current_config & ~PP_DMA_MASK) | drq;
203 pnp_write_config(dev, PP_DMA_SELECTION_REGISTER, new_config);
209 static void lpc47n217_pnp_set_irq(device_t dev, u8 irq)
211 u8 irq_config_register = 0, irq_config_mask = 0;
212 u8 current_config, new_config;
214 switch(dev->path.pnp.device) {
216 irq_config_register = 0x27;
217 irq_config_mask = 0x0F;
220 irq_config_register = 0x28;
221 irq_config_mask = 0xF0;
225 irq_config_register = 0x28;
226 irq_config_mask = 0x0F;
233 ASSERT(!(irq & ~irq_config_mask)); /* IRQ out of range? */
235 current_config = pnp_read_config(dev, irq_config_register);
236 new_config = (current_config & ~irq_config_mask) | irq;
237 pnp_write_config(dev, irq_config_register, new_config);
240 static void lpc47n217_pnp_set_enable(device_t dev, int enable)
242 u8 power_register = 0, power_mask = 0, current_power, new_power;
244 switch(dev->path.pnp.device) {
246 power_register = 0x01;
250 power_register = 0x02;
254 power_register = 0x02;
262 current_power = pnp_read_config(dev, power_register);
263 new_power = current_power & ~power_mask; /* Disable by default. */
265 struct resource* ioport_resource;
266 ioport_resource = find_resource(dev, PNP_IDX_IO0);
267 lpc47n217_pnp_set_iobase(dev, ioport_resource->base);
268 new_power |= power_mask; /* Enable. */
270 lpc47n217_pnp_set_iobase(dev, 0);
272 pnp_write_config(dev, power_register, new_power);
275 static void pnp_enter_conf_state(device_t dev)
277 outb(0x55, dev->path.pnp.port);
280 static void pnp_exit_conf_state(device_t dev)
282 outb(0xaa, dev->path.pnp.port);
287 * Print the values of all of the LPC47N217's configuration registers.
289 * NOTE: The LPC47N217 must be in config mode when this function is called.
291 * @param dev Pointer to structure describing a Super I/O device.
293 static void dump_pnp_device(device_t dev)
298 for (i = 0; i <= LPC47N217_MAX_CONFIG_REGISTER; i++) {
301 if ((i & 0x0f) == 0) {
303 print_debug_char(':');
307 * Skip over 'register' that would cause exit from
308 * configuration mode.
311 register_value = 0xaa;
313 register_value = pnp_read_config(dev, i);
315 print_debug_char(' ');
316 print_debug_hex8(register_value);
317 if ((i & 0x0f) == 0x0f)