Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...
[linux-2.6] / arch / arm / mach-sa1100 / collie_pm.c
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 <asm/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
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
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
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
89 static void collie_discharge(int on)
90 {
91 }
92
93 static void collie_discharge1(int on)
94 {
95 }
96
97 static void collie_presuspend(void)
98 {
99 }
100
101 static void collie_postsuspend(void)
102 {
103 }
104
105 static int collie_should_wakeup(unsigned int resume_on_alarm)
106 {
107         return 0;
108 }
109
110 static unsigned long collie_charger_wakeup(void)
111 {
112         return 0;
113 }
114
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
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
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
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
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
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
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);