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-rw-r--r--arch/arm/mach-sa1100/collie_pm.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/collie_pm.c b/arch/arm/mach-sa1100/collie_pm.c
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index 000000000000..696d7d29c8a5
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+++ b/arch/arm/mach-sa1100/collie_pm.c
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1/*
2 * Based on spitz_pm.c and sharp code.
3 *
4 * Copyright (C) 2001 SHARP
5 * Copyright 2005 Pavel Machek <pavel@suse.cz>
6 *
7 * Distribute under GPLv2.
8 *
9 * Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
10 * and sometimes charges them when it should not. If it makes angry lithium to come your way...
11 * ...well, you have been warned.
12 */
13
14#include <linux/module.h>
15#include <linux/stat.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/delay.h>
19#include <linux/interrupt.h>
20#include <linux/device.h>
21#include <linux/platform_device.h>
22
23#include <asm/irq.h>
24#include <asm/mach-types.h>
25#include <asm/hardware.h>
26#include <asm/hardware/scoop.h>
27#include <asm/dma.h>
28#include <asm/arch/collie.h>
29#include <asm/mach/sharpsl_param.h>
30#include <asm/hardware/sharpsl_pm.h>
31
32#include "../drivers/mfd/ucb1x00.h"
33
34static struct ucb1x00 *ucb;
35static int ad_revise;
36
37#define ADCtoPower(x) ((330 * x * 2) / 1024)
38
39static void collie_charger_init(void)
40{
41 int err;
42
43 if (sharpsl_param.adadj != -1) {
44 ad_revise = sharpsl_param.adadj;
45 }
46
47 /* Register interrupt handler. */
48 if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, SA_INTERRUPT,
49 "ACIN", sharpsl_ac_isr))) {
50 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
51 return;
52 }
53 if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, SA_INTERRUPT,
54 "CO", sharpsl_chrg_full_isr))) {
55 free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
56 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
57 return;
58 }
59
60 ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
61 COLLIE_TC35143_GPIO_BBAT_ON);
62 return;
63}
64
65static void collie_measure_temp(int on)
66{
67 if (on)
68 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
69 else
70 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
71}
72
73static void collie_charge(int on)
74{
75 if (on) {
76 printk("Should start charger\n");
77 } else {
78 printk("Should stop charger\n");
79 }
80#ifdef I_AM_SURE
81
82 /* Zaurus seems to contain LTC1731 ; it should know when to
83 * stop charging itself, so setting charge on should be
84 * relatively harmless (as long as it is not done too often).
85 */
86#define CF_BUF_CTRL_BASE 0xF0800000
87#define SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr)))
88#define SCOOP_REG_GPWR SCOOP_REG(SCOOP_GPWR)
89
90 if (on) {
91 set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
92 } else {
93 reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
94 }
95#endif
96}
97
98static void collie_discharge(int on)
99{
100}
101
102static void collie_discharge1(int on)
103{
104}
105
106static void collie_presuspend(void)
107{
108}
109
110static void collie_postsuspend(void)
111{
112}
113
114static int collie_should_wakeup(unsigned int resume_on_alarm)
115{
116 return 0;
117}
118
119static unsigned long collie_charger_wakeup(void)
120{
121 return 0;
122}
123
124int collie_read_backup_battery(void)
125{
126 int voltage;
127
128 ucb1x00_adc_enable(ucb);
129
130 /* Gives 75..130 */
131 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
132 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
133
134 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
135 ucb1x00_adc_disable(ucb);
136
137 printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
138
139 return ADCtoPower(voltage);
140}
141
142int collie_read_main_battery(void)
143{
144 int voltage, voltage_rev, voltage_volts;
145
146 ucb1x00_adc_enable(ucb);
147 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
148 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
149 /* gives values 160..255 with battery removed... and
150 145..255 with battery inserted. (on AC), goes as low as
151 80 on DC. */
152 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
153
154 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
155 ucb1x00_adc_disable(ucb);
156
157 voltage_rev = voltage + ((ad_revise * voltage) / 652);
158 voltage_volts = ADCtoPower(voltage_rev);
159
160 printk("Main battery = %d(%d)\n", voltage_volts, voltage);
161
162 if (voltage != -1)
163 return voltage_volts;
164 else
165 return voltage;
166}
167
168int collie_read_temp(void)
169{
170 int voltage;
171
172 /* According to Sharp, temp must be > 973, main battery must be < 465,
173 FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
174 are way out of range? */
175
176 ucb1x00_adc_enable(ucb);
177 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
178 /* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
179 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
180 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
181 ucb1x00_adc_disable(ucb);
182
183 printk("Battery temp = %d\n", voltage);
184 return voltage;
185}
186
187static unsigned long read_devdata(int which)
188{
189 switch (which) {
190 case SHARPSL_BATT_VOLT:
191 return collie_read_main_battery();
192 case SHARPSL_BATT_TEMP:
193 return collie_read_temp();
194 case SHARPSL_ACIN_VOLT:
195 return 0x1;
196 case SHARPSL_STATUS_ACIN: {
197 int ret = GPLR & COLLIE_GPIO_AC_IN;
198 printk("AC status = %d\n", ret);
199 return ret;
200 }
201 case SHARPSL_STATUS_FATAL: {
202 int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
203 printk("Fatal bat = %d\n", ret);
204 return ret;
205 }
206 default:
207 return ~0;
208 }
209}
210
211struct battery_thresh collie_battery_levels[] = {
212 { 368, 100},
213 { 358, 25},
214 { 356, 5},
215 { 0, 0},
216};
217
218struct sharpsl_charger_machinfo collie_pm_machinfo = {
219 .init = collie_charger_init,
220 .read_devdata = read_devdata,
221 .discharge = collie_discharge,
222 .discharge1 = collie_discharge1,
223 .charge = collie_charge,
224 .measure_temp = collie_measure_temp,
225 .presuspend = collie_presuspend,
226 .postsuspend = collie_postsuspend,
227 .charger_wakeup = collie_charger_wakeup,
228 .should_wakeup = collie_should_wakeup,
229 .bat_levels = 3,
230 .bat_levels_noac = collie_battery_levels,
231 .bat_levels_acin = collie_battery_levels,
232 .status_high_acin = 368,
233 .status_low_acin = 358,
234 .status_high_noac = 368,
235 .status_low_noac = 358,
236};
237
238static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
239{
240 sharpsl_pm.machinfo = &collie_pm_machinfo;
241 ucb = pdev->ucb;
242 return 0;
243}
244
245static struct ucb1x00_driver collie_pm_ucb_driver = {
246 .add = collie_pm_ucb_add,
247};
248
249static struct platform_device *collie_pm_device;
250
251static int __init collie_pm_init(void)
252{
253 int ret;
254
255 collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
256 if (!collie_pm_device)
257 return -ENOMEM;
258
259 collie_pm_device->dev.platform_data = &collie_pm_machinfo;
260 ret = platform_device_add(collie_pm_device);
261
262 if (ret)
263 platform_device_put(collie_pm_device);
264
265 if (!ret)
266 ret = ucb1x00_register_driver(&collie_pm_ucb_driver);
267
268 return ret;
269}
270
271static void __exit collie_pm_exit(void)
272{
273 ucb1x00_unregister_driver(&collie_pm_ucb_driver);
274 platform_device_unregister(collie_pm_device);
275}
276
277module_init(collie_pm_init);
278module_exit(collie_pm_exit);