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 * Actually, this should be quite safe, it seems sharp leaves charger enabled by default,
14 * and my collie did not explode (yet).
15 */
16
17 #include <linux/module.h>
18 #include <linux/stat.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/device.h>
24 #include <linux/platform_device.h>
25
26 #include <asm/irq.h>
27 #include <mach/hardware.h>
28 #include <asm/hardware/scoop.h>
29 #include <mach/dma.h>
30 #include <mach/collie.h>
31 #include <asm/mach/sharpsl_param.h>
32 #include <asm/hardware/sharpsl_pm.h>
33
34 #include "../drivers/mfd/ucb1x00.h"
35
36 static struct ucb1x00 *ucb;
37 static int ad_revise;
38
39 #define ADCtoPower(x) ((330 * x * 2) / 1024)
40
collie_charger_init(void)41 static void collie_charger_init(void)
42 {
43 int err;
44
45 if (sharpsl_param.adadj != -1)
46 ad_revise = sharpsl_param.adadj;
47
48 /* Register interrupt handler. */
49 if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, IRQF_DISABLED,
50 "ACIN", sharpsl_ac_isr))) {
51 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
52 return;
53 }
54 if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, IRQF_DISABLED,
55 "CO", sharpsl_chrg_full_isr))) {
56 free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
57 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
58 return;
59 }
60
61 ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
62 COLLIE_TC35143_GPIO_BBAT_ON);
63 return;
64 }
65
collie_measure_temp(int on)66 static void collie_measure_temp(int on)
67 {
68 if (on)
69 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
70 else
71 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
72 }
73
collie_charge(int on)74 static void collie_charge(int on)
75 {
76 extern struct platform_device colliescoop_device;
77
78 /* Zaurus seems to contain LTC1731; it should know when to
79 * stop charging itself, so setting charge on should be
80 * relatively harmless (as long as it is not done too often).
81 */
82 if (on) {
83 set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
84 } else {
85 reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
86 }
87 }
88
collie_discharge(int on)89 static void collie_discharge(int on)
90 {
91 }
92
collie_discharge1(int on)93 static void collie_discharge1(int on)
94 {
95 }
96
collie_presuspend(void)97 static void collie_presuspend(void)
98 {
99 }
100
collie_postsuspend(void)101 static void collie_postsuspend(void)
102 {
103 }
104
collie_should_wakeup(unsigned int resume_on_alarm)105 static int collie_should_wakeup(unsigned int resume_on_alarm)
106 {
107 return 0;
108 }
109
collie_charger_wakeup(void)110 static unsigned long collie_charger_wakeup(void)
111 {
112 return 0;
113 }
114
collie_read_backup_battery(void)115 int collie_read_backup_battery(void)
116 {
117 int voltage;
118
119 ucb1x00_adc_enable(ucb);
120
121 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
122 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
123
124 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
125 ucb1x00_adc_disable(ucb);
126
127 printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
128
129 return ADCtoPower(voltage);
130 }
131
collie_read_main_battery(void)132 int collie_read_main_battery(void)
133 {
134 int voltage, voltage_rev, voltage_volts;
135
136 ucb1x00_adc_enable(ucb);
137 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
138 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
139
140 mdelay(1);
141 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
142
143 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
144 ucb1x00_adc_disable(ucb);
145
146 voltage_rev = voltage + ((ad_revise * voltage) / 652);
147 voltage_volts = ADCtoPower(voltage_rev);
148
149 printk("Main battery = %d(%d)\n", voltage_volts, voltage);
150
151 if (voltage != -1)
152 return voltage_volts;
153 else
154 return voltage;
155 }
156
collie_read_temp(void)157 int collie_read_temp(void)
158 {
159 int voltage;
160
161 /* According to Sharp, temp must be > 973, main battery must be < 465,
162 FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
163 are way out of range? */
164
165 ucb1x00_adc_enable(ucb);
166 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
167 /* >1010 = battery removed, 460 = 22C ?, higher = lower temp ? */
168 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
169 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
170 ucb1x00_adc_disable(ucb);
171
172 printk("Battery temp = %d\n", voltage);
173 return voltage;
174 }
175
read_devdata(int which)176 static unsigned long read_devdata(int which)
177 {
178 switch (which) {
179 case SHARPSL_BATT_VOLT:
180 return collie_read_main_battery();
181 case SHARPSL_BATT_TEMP:
182 return collie_read_temp();
183 case SHARPSL_ACIN_VOLT:
184 return 500;
185 case SHARPSL_STATUS_ACIN: {
186 int ret = GPLR & COLLIE_GPIO_AC_IN;
187 printk("AC status = %d\n", ret);
188 return ret;
189 }
190 case SHARPSL_STATUS_FATAL: {
191 int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
192 printk("Fatal bat = %d\n", ret);
193 return ret;
194 }
195 default:
196 return ~0;
197 }
198 }
199
200 struct battery_thresh collie_battery_levels_acin[] = {
201 { 420, 100},
202 { 417, 95},
203 { 415, 90},
204 { 413, 80},
205 { 411, 75},
206 { 408, 70},
207 { 406, 60},
208 { 403, 50},
209 { 398, 40},
210 { 391, 25},
211 { 10, 5},
212 { 0, 0},
213 };
214
215 struct battery_thresh collie_battery_levels[] = {
216 { 394, 100},
217 { 390, 95},
218 { 380, 90},
219 { 370, 80},
220 { 368, 75}, /* From sharp code: battery high with frontlight */
221 { 366, 70}, /* 60..90 -- fake values invented by me for testing */
222 { 364, 60},
223 { 362, 50},
224 { 360, 40},
225 { 358, 25}, /* From sharp code: battery low with frontlight */
226 { 356, 5}, /* From sharp code: battery verylow with frontlight */
227 { 0, 0},
228 };
229
230 struct sharpsl_charger_machinfo collie_pm_machinfo = {
231 .init = collie_charger_init,
232 .read_devdata = read_devdata,
233 .discharge = collie_discharge,
234 .discharge1 = collie_discharge1,
235 .charge = collie_charge,
236 .measure_temp = collie_measure_temp,
237 .presuspend = collie_presuspend,
238 .postsuspend = collie_postsuspend,
239 .charger_wakeup = collie_charger_wakeup,
240 .should_wakeup = collie_should_wakeup,
241 .bat_levels = 12,
242 .bat_levels_noac = collie_battery_levels,
243 .bat_levels_acin = collie_battery_levels_acin,
244 .status_high_acin = 368,
245 .status_low_acin = 358,
246 .status_high_noac = 368,
247 .status_low_noac = 358,
248 .charge_on_volt = 350, /* spitz uses 2.90V, but lets play it safe. */
249 .charge_on_temp = 550,
250 .charge_acin_high = 550, /* collie does not seem to have sensor for this, anyway */
251 .charge_acin_low = 450, /* ignored, too */
252 .fatal_acin_volt = 356,
253 .fatal_noacin_volt = 356,
254
255 .batfull_irq = 1, /* We do not want periodical charge restarts */
256 };
257
collie_pm_ucb_add(struct ucb1x00_dev * pdev)258 static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
259 {
260 sharpsl_pm.machinfo = &collie_pm_machinfo;
261 ucb = pdev->ucb;
262 return 0;
263 }
264
265 static struct ucb1x00_driver collie_pm_ucb_driver = {
266 .add = collie_pm_ucb_add,
267 };
268
269 static struct platform_device *collie_pm_device;
270
collie_pm_init(void)271 static int __init collie_pm_init(void)
272 {
273 int ret;
274
275 collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
276 if (!collie_pm_device)
277 return -ENOMEM;
278
279 collie_pm_device->dev.platform_data = &collie_pm_machinfo;
280 ret = platform_device_add(collie_pm_device);
281
282 if (ret)
283 platform_device_put(collie_pm_device);
284
285 if (!ret)
286 ret = ucb1x00_register_driver(&collie_pm_ucb_driver);
287
288 return ret;
289 }
290
collie_pm_exit(void)291 static void __exit collie_pm_exit(void)
292 {
293 ucb1x00_unregister_driver(&collie_pm_ucb_driver);
294 platform_device_unregister(collie_pm_device);
295 }
296
297 module_init(collie_pm_init);
298 module_exit(collie_pm_exit);
299