summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-sa1100/collie_pm.c
blob: 696d7d29c8a5bf7496bc35f9703cb25d0bd17501 (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
/*
 * Based on spitz_pm.c and sharp code.
 *
 * Copyright (C) 2001  SHARP
 * Copyright 2005 Pavel Machek <pavel@suse.cz>
 *
 * Distribute under GPLv2.
 *
 * Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
 * and sometimes charges them when it should not. If it makes angry lithium to come your way...
 * ...well, you have been warned.
 */

#include <linux/module.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>

#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/hardware/scoop.h>
#include <asm/dma.h>
#include <asm/arch/collie.h>
#include <asm/mach/sharpsl_param.h>
#include <asm/hardware/sharpsl_pm.h>

#include "../drivers/mfd/ucb1x00.h"

static struct ucb1x00 *ucb;
static int ad_revise;

#define ADCtoPower(x)	       ((330 * x * 2) / 1024)

static void collie_charger_init(void)
{
	int err;

	if (sharpsl_param.adadj != -1) {
		ad_revise = sharpsl_param.adadj;
	}

	/* Register interrupt handler. */
	if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, SA_INTERRUPT,
			       "ACIN", sharpsl_ac_isr))) {
		printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
		return;
	}
	if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, SA_INTERRUPT,
			       "CO", sharpsl_chrg_full_isr))) {
		free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
		printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
		return;
	}

	ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
			           COLLIE_TC35143_GPIO_BBAT_ON);
	return;
}

static void collie_measure_temp(int on)
{
	if (on)
		ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
	else
		ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
}

static void collie_charge(int on)
{
	if (on) {
		printk("Should start charger\n");
	} else {
		printk("Should stop charger\n");
	}
#ifdef I_AM_SURE

	/* Zaurus seems to contain LTC1731 ; it should know when to
	 * stop charging itself, so setting charge on should be
	 * relatively harmless (as long as it is not done too often).
	 */
#define CF_BUF_CTRL_BASE 0xF0800000
#define        SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr)))
#define        SCOOP_REG_GPWR    SCOOP_REG(SCOOP_GPWR)

	if (on) {
		set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
	} else {
		reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
	}
#endif
}

static void collie_discharge(int on)
{
}

static void collie_discharge1(int on)
{
}

static void collie_presuspend(void)
{
}

static void collie_postsuspend(void)
{
}

static int collie_should_wakeup(unsigned int resume_on_alarm)
{
	return 0;
}

static unsigned long collie_charger_wakeup(void)
{
	return 0;
}

int collie_read_backup_battery(void)
{
	int voltage;

	ucb1x00_adc_enable(ucb);

	/* Gives 75..130 */
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
	ucb1x00_adc_disable(ucb);

	printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);

	return ADCtoPower(voltage);
}

int collie_read_main_battery(void)
{
	int voltage, voltage_rev, voltage_volts;

	ucb1x00_adc_enable(ucb);
	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
	/* gives values 160..255 with battery removed... and
	   145..255 with battery inserted. (on AC), goes as low as
	   80 on DC. */
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
	ucb1x00_adc_disable(ucb);

	voltage_rev = voltage + ((ad_revise * voltage) / 652);
	voltage_volts = ADCtoPower(voltage_rev);

	printk("Main battery = %d(%d)\n", voltage_volts, voltage);

	if (voltage != -1)
		return voltage_volts;
	else
		return voltage;
}

int collie_read_temp(void)
{
	int voltage;

	/* According to Sharp, temp must be > 973, main battery must be < 465,
	   FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
	   are way out of range? */

	ucb1x00_adc_enable(ucb);
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
	/* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
	ucb1x00_adc_disable(ucb);

	printk("Battery temp = %d\n", voltage);
	return voltage;
}

static unsigned long read_devdata(int which)
{
	switch (which) {
	case SHARPSL_BATT_VOLT:
		return collie_read_main_battery();
	case SHARPSL_BATT_TEMP:
		return collie_read_temp();
	case SHARPSL_ACIN_VOLT:
		return 0x1;
	case SHARPSL_STATUS_ACIN: {
		int ret = GPLR & COLLIE_GPIO_AC_IN;
		printk("AC status = %d\n", ret);
		return ret;
	}
	case SHARPSL_STATUS_FATAL: {
		int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
		printk("Fatal bat = %d\n", ret);
		return ret;
	}
	default:
		return ~0;
	}
}

struct battery_thresh collie_battery_levels[] = {
	{ 368, 100},
	{ 358,  25},
	{ 356,   5},
	{   0,   0},
};

struct sharpsl_charger_machinfo collie_pm_machinfo = {
	.init             = collie_charger_init,
	.read_devdata	  = read_devdata,
	.discharge        = collie_discharge,
	.discharge1       = collie_discharge1,
	.charge           = collie_charge,
	.measure_temp     = collie_measure_temp,
	.presuspend       = collie_presuspend,
	.postsuspend      = collie_postsuspend,
	.charger_wakeup   = collie_charger_wakeup,
	.should_wakeup    = collie_should_wakeup,
	.bat_levels       = 3,
	.bat_levels_noac  = collie_battery_levels,
	.bat_levels_acin  = collie_battery_levels,
	.status_high_acin = 368,
	.status_low_acin  = 358,
	.status_high_noac = 368,
	.status_low_noac  = 358,
};

static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
{
	sharpsl_pm.machinfo = &collie_pm_machinfo;
	ucb = pdev->ucb;
	return 0;
}

static struct ucb1x00_driver collie_pm_ucb_driver = {
	.add            = collie_pm_ucb_add,
};

static struct platform_device *collie_pm_device;

static int __init collie_pm_init(void)
{
        int ret;

        collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
        if (!collie_pm_device)
                return -ENOMEM;

        collie_pm_device->dev.platform_data = &collie_pm_machinfo;
        ret = platform_device_add(collie_pm_device);

        if (ret)
                platform_device_put(collie_pm_device);

	if (!ret)
		ret = ucb1x00_register_driver(&collie_pm_ucb_driver);

	return ret;
}

static void __exit collie_pm_exit(void)
{
	ucb1x00_unregister_driver(&collie_pm_ucb_driver);
        platform_device_unregister(collie_pm_device);
}

module_init(collie_pm_init);
module_exit(collie_pm_exit);