summaryrefslogtreecommitdiff
path: root/src/superio/smsc/lpc47n217/superio.c
blob: e7a5b5c0c95fb026c011f3e2705d79f6d7dfdf1f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
/*
 * superio.c: RAM-based driver for SMSC LPC47N217 Super I/O chip
 *
 * Based on LinuxBIOS code for SMSC 47B397:
 * Copyright 2000  AG Electronics Ltd.
 * Copyright 2003-2004 Linux Networx
 * Copyright 2004 Tyan 
 *
 * Copyright (C) 2005 Digital Design Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <arch/io.h>
#include <device/device.h>
#include <device/pnp.h>
#include <console/console.h>
#include <device/smbus.h>
#include <string.h>
#include <bitops.h>
#include <uart8250.h>
#include <assert.h>
#include "chip.h"
#include "lpc47n217.h"

// Forward declarations
static void enable_dev(device_t dev);
void lpc47n217_pnp_set_resources(device_t dev);
void lpc47n217_pnp_enable_resources(device_t dev);
void lpc47n217_pnp_enable(device_t dev);
static void lpc47n217_init(device_t dev);

static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource);
void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase);
void lpc47n217_pnp_set_drq(device_t dev, unsigned drq);
void lpc47n217_pnp_set_irq(device_t dev, unsigned irq);
void lpc47n217_pnp_set_enable(device_t dev, int enable);

static void pnp_enter_conf_state(device_t dev);
static void pnp_exit_conf_state(device_t dev);


struct chip_operations superio_smsc_lpc47n217_ops = {
	CHIP_NAME("SMSC LPC47N217 Super I/O")
	.enable_dev = enable_dev,
};

static struct device_operations ops = {
	.read_resources   = pnp_read_resources,
	.set_resources    = lpc47n217_pnp_set_resources,
	.enable_resources = lpc47n217_pnp_enable_resources,
	.enable           = lpc47n217_pnp_enable,
	.init             = lpc47n217_init,
};

static struct pnp_info pnp_dev_info[] = {
        { &ops, LPC47N217_PP,   PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
        { &ops, LPC47N217_SP1,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
        { &ops, LPC47N217_SP2,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, }
};

/**********************************************************************************/
/*								PUBLIC INTERFACE								  */
/**********************************************************************************/

//----------------------------------------------------------------------------------
// Function:    	enable_dev
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Create device structures and allocate resources to devices 
//					specified in the pnp_dev_info array (above).
//
static void enable_dev(device_t dev)
{
	pnp_enable_devices(dev, &pnp_ops, 
					   sizeof(pnp_dev_info)/sizeof(pnp_dev_info[0]), 
					   pnp_dev_info);
}

//----------------------------------------------------------------------------------
// Function:    	lpc47n217_pnp_set_resources
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Configure the specified Super I/O device with the resources
//					(I/O space, etc.) that have been allocate for it.
//
void lpc47n217_pnp_set_resources(device_t dev)
{
	int i;
	
	pnp_enter_conf_state(dev);  

	// NOTE: Cannot use pnp_set_resources() here because it assumes chip
	//		 support for logical devices, which the LPC47N217 doesn't have
	for(i = 0; i < dev->resources; i++)
		lpc47n217_pnp_set_resource(dev, &dev->resource[i]);

//	dump_pnp_device(dev);
                
   	pnp_exit_conf_state(dev);  
}       

void lpc47n217_pnp_enable_resources(device_t dev)
{       
    pnp_enter_conf_state(dev);

	// NOTE: Cannot use pnp_enable_resources() here because it assumes chip
	//		 support for logical devices, which the LPC47N217 doesn't have
    lpc47n217_pnp_set_enable(dev, 1);

    pnp_exit_conf_state(dev);
}

void lpc47n217_pnp_enable(device_t dev)
{
	pnp_enter_conf_state(dev);   

	// NOTE: Cannot use pnp_set_enable() here because it assumes chip
	//		 support for logical devices, which the LPC47N217 doesn't have

	if(dev->enabled) {
		lpc47n217_pnp_set_enable(dev, 1);
	}
	else {
		lpc47n217_pnp_set_enable(dev, 0);
	}

	pnp_exit_conf_state(dev);  
}

//----------------------------------------------------------------------------------
// Function:    	lpc47n217_init
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Initialize the specified Super I/O device.
//					Devices other than COM ports are ignored.
//					For COM ports, we configure the baud rate. 
//
static void lpc47n217_init(device_t dev)
{
	struct superio_smsc_lpc47n217_config* conf = dev->chip_info;
	struct resource *res0;

	if (!dev->enabled)
		return;

	switch(dev->path.u.pnp.device) {
	case LPC47N217_SP1: 
		res0 = find_resource(dev, PNP_IDX_IO0);
		init_uart8250(res0->base, &conf->com1);
		break;

	case LPC47N217_SP2:
		res0 = find_resource(dev, PNP_IDX_IO0);
		init_uart8250(res0->base, &conf->com2);
		break;
	}
}


/**********************************************************************************/
/*								PRIVATE FUNCTIONS							      */
/**********************************************************************************/

static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource)
{
	if (!(resource->flags & IORESOURCE_ASSIGNED)) {
		printk_err("ERROR: %s %02x not allocated\n",
			dev_path(dev), resource->index);
		return;
	}

	/* Now store the resource */
	// NOTE: Cannot use pnp_set_XXX() here because they assume chip
	//		 support for logical devices, which the LPC47N217 doesn't have

	if (resource->flags & IORESOURCE_IO) {
		lpc47n217_pnp_set_iobase(dev, resource->base);
	}
	else if (resource->flags & IORESOURCE_DRQ) {
		lpc47n217_pnp_set_drq(dev, resource->base);
	}
	else if (resource->flags  & IORESOURCE_IRQ) {
		lpc47n217_pnp_set_irq(dev, resource->base);
	}
	else {
		printk_err("ERROR: %s %02x unknown resource type\n",
			dev_path(dev), resource->index);
		return;
	}
	resource->flags |= IORESOURCE_STORED;

	report_resource_stored(dev, resource, "");
}

void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase)
{
	ASSERT(!(iobase & 0x3));
	
	switch(dev->path.u.pnp.device) {
	case LPC47N217_PP: 
		pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff);
		break;
		
	case LPC47N217_SP1: 
		pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff);
		break;
		
	case LPC47N217_SP2:
		pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff);
		break;
		
	default:
		BUG();
		break;
	}
}

void lpc47n217_pnp_set_drq(device_t dev, unsigned drq)
{
	if (dev->path.u.pnp.device == LPC47N217_PP) {
		const uint8_t PP_DMA_MASK = 0x0F;
		const uint8_t PP_DMA_SELECTION_REGISTER = 0x26;
		uint8_t current_config = pnp_read_config(dev, PP_DMA_SELECTION_REGISTER);
		uint8_t new_config;

		ASSERT(!(drq & ~PP_DMA_MASK));		// DRQ out of range??		
		new_config = (current_config & ~PP_DMA_MASK) | drq;
		pnp_write_config(dev, PP_DMA_SELECTION_REGISTER, new_config);
	} else {
		BUG();
	}
}

void lpc47n217_pnp_set_irq(device_t dev, unsigned irq)
{
	uint8_t irq_config_register = 0;
	uint8_t irq_config_mask = 0;
	uint8_t current_config;
	uint8_t new_config;
	
	switch(dev->path.u.pnp.device) {
	case LPC47N217_PP: 
		irq_config_register = 0x27;
		irq_config_mask = 0x0F;
		break;
		
	case LPC47N217_SP1: 
		irq_config_register = 0x28;
		irq_config_mask = 0xF0;
		irq <<= 4;
		break;
		
	case LPC47N217_SP2:
		irq_config_register = 0x28;
		irq_config_mask = 0x0F;
		break;
		
	default:
		BUG();
		return;
	}

	ASSERT(!(irq & ~irq_config_mask));		// IRQ out of range??
	
	current_config = pnp_read_config(dev, irq_config_register);
	new_config = (current_config & ~irq_config_mask) | irq;
	pnp_write_config(dev, irq_config_register, new_config);
}

void lpc47n217_pnp_set_enable(device_t dev, int enable)
{
	uint8_t power_register = 0;
	uint8_t power_mask = 0;
	uint8_t current_power;
	uint8_t new_power;
	
	switch(dev->path.u.pnp.device) {
	case LPC47N217_PP: 
		power_register = 0x01;
		power_mask = 0x04;
		break;
		
	case LPC47N217_SP1: 
		power_register = 0x02;
		power_mask = 0x08;
		break;
		
	case LPC47N217_SP2:
		power_register = 0x02;
		power_mask = 0x80;
		break;
		
	default:
		BUG();
		return;
	}

	current_power = pnp_read_config(dev, power_register);
	new_power = current_power & ~power_mask;		// disable by default

	if (enable) {
		struct resource* ioport_resource = find_resource(dev, PNP_IDX_IO0);
		lpc47n217_pnp_set_iobase(dev, ioport_resource->base);
		
		new_power |= power_mask;		// Enable
		
    } else {
		lpc47n217_pnp_set_iobase(dev, 0);
	}
	pnp_write_config(dev, power_register, new_power);
}


//----------------------------------------------------------------------------------
// Function:    	pnp_enter_conf_state
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Enable access to the LPC47N217's configuration registers.
//
static void pnp_enter_conf_state(device_t dev) 
{
	outb(0x55, dev->path.u.pnp.port);
}

//----------------------------------------------------------------------------------
// Function:    	pnp_exit_conf_state
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Disable access to the LPC47N217's configuration registers.
//
static void pnp_exit_conf_state(device_t dev) 
{
    outb(0xaa, dev->path.u.pnp.port);
}

#if 0
//----------------------------------------------------------------------------------
// Function:    	dump_pnp_device
// Parameters:  	dev - pointer to structure describing a Super I/O device 
// Return Value:	None
// Description: 	Print the values of all of the LPC47N217's configuration registers.
//					NOTE: The LPC47N217 must be in configuration mode when this
//						  function is called.
//
static void dump_pnp_device(device_t dev)
{
    int register_index;
    print_debug("\r\n");

    for(register_index = 0; register_index <= LPC47N217_MAX_CONFIG_REGISTER; register_index++) {
        uint8_t register_value;

        if ((register_index & 0x0f) == 0) {
                print_debug_hex8(register_index);
                print_debug_char(':');
        }

		// Skip over 'register' that would cause exit from configuration mode
	    if (register_index == 0xaa)
			register_value = 0xaa;
		else
        	register_value = pnp_read_config(dev, register_index);

        print_debug_char(' ');
        print_debug_hex8(register_value);
        if ((register_index & 0x0f) == 0x0f) {
        	print_debug("\r\n");
        }
    }

   	print_debug("\r\n");
}
#endif