1 /* drivers/power/wm831x_charger_display.c
3 * battery detect driver for the rk2818
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/input.h>
21 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/suspend.h>
25 #include <linux/linux_logo.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/platform_device.h>
28 #include <linux/workqueue.h>
29 #include <linux/mfd/wm831x/core.h>
30 #include <mach/gpio.h>
31 #include <mach/iomux.h>
32 #include <mach/rk29_iomap.h>
34 #include <linux/mfd/wm831x/core.h>
35 #include <linux/mfd/wm831x/auxadc.h>
36 #include <linux/mfd/wm831x/pmu.h>
37 #include <linux/mfd/wm831x/pdata.h>
38 #include <linux/mfd/wm831x/irq.h>
39 #include <linux/power_supply.h>
42 #define READ_ON_PIN_CNT 20/*11*/
43 #define BACKLIGHT_CNT 2
45 #define MC_OPEN 7/*10*/
46 #define BAT_CHARGING 1
47 #define BAT_DISCHARGING 0
48 #define BL_DELAY_TIME (8*1000)
51 #define SET_BACKLIGHT_ON 1
53 #define SUSPEND_SYSTEM 3
56 #define DBG(x...) printk(x)
61 extern void request_suspend_state(suspend_state_t new_state);
62 extern void kernel_restart(char *cmd);
63 extern void kernel_power_off(void);
65 extern unsigned g_vbus_status_register;
66 extern unsigned long *g_pcd_for_charger;
68 extern int rk29_backlight_ctrl(int open);
70 extern void fb_show_charge_logo(struct linux_logo *logo);
72 extern void kernel_restart_prepare(char *cmd);
73 extern int dwc_vbus_status( void );
74 extern int dwc_otg_pcd_check_vbus_detech( unsigned long pdata );
76 #if defined(CONFIG_LOGO_CHARGER_CLUT224)
77 extern struct linux_logo logo_charger01_clut224;
78 extern struct linux_logo logo_charger02_clut224;
79 extern struct linux_logo logo_charger03_clut224;
80 extern struct linux_logo logo_charger04_clut224;
81 extern struct linux_logo logo_charger05_clut224;
82 extern struct linux_logo logo_charger06_clut224;
83 extern struct linux_logo logo_charger07_clut224;
84 extern struct linux_logo logo_charger08_clut224;
87 extern struct fb_info *g_fb0_inf;
89 static struct linux_logo* g_chargerlogo[8]= {
90 #if defined(CONFIG_LOGO_CHARGER_CLUT224)
91 &logo_charger01_clut224,&logo_charger02_clut224,&logo_charger03_clut224,&logo_charger04_clut224,
92 &logo_charger05_clut224,&logo_charger06_clut224,&logo_charger07_clut224,&logo_charger08_clut224
98 struct wm831x *wm831x;
109 static int charger_logo_display(struct linux_logo *logo)
111 fb_show_charge_logo(logo);
112 fb_show_logo(g_fb0_inf, 0);
116 static int charger_backlight_ctrl(int open)
118 DBG("%s:open=%d\n",__FUNCTION__,open);
119 return rk29_backlight_ctrl(open);
122 static int wm831x_read_on_pin_status(struct wm831x_chg *wm831x_chg)
128 printk("err:%s:wm831x_chg address is 0\n",__FUNCTION__);
132 ret = wm831x_reg_read(wm831x_chg->wm831x, WM831X_ON_PIN_CONTROL);
136 return !(ret & WM831X_ON_PIN_STS) ? 1 : 0;
140 static int wm831x_read_chg_status(struct wm831x_chg *wm831x_chg)
142 int ret, usb_chg = 0, wall_chg = 0;
146 printk("err:%s:wm831x_chg address is 0\n",__FUNCTION__);
150 ret = wm831x_reg_read(wm831x_chg->wm831x, WM831X_SYSTEM_STATUS);
154 if (ret & WM831X_PWR_USB)
156 if (ret & WM831X_PWR_WALL)
159 return ((usb_chg | wall_chg) ? 1 : 0);
162 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
166 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
170 if (ret & WM831X_PWR_SRC_BATT) {
171 *status = POWER_SUPPLY_STATUS_DISCHARGING;
175 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
180 switch (ret & WM831X_CHG_STATE_MASK) {
181 case WM831X_CHG_STATE_OFF:
182 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
184 case WM831X_CHG_STATE_TRICKLE:
185 case WM831X_CHG_STATE_FAST:
186 *status = POWER_SUPPLY_STATUS_CHARGING;
190 *status = POWER_SUPPLY_STATUS_UNKNOWN;
197 static int wm831x_read_bat_charging_status(struct wm831x_chg *wm831x_chg)
203 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
207 ret = wm831x_bat_check_status(wm831x_chg->wm831x, &status);
210 if (status == POWER_SUPPLY_STATUS_CHARGING)
215 static int wm831x_read_batt_voltage(struct wm831x_chg *wm831x_chg)
221 printk("err:%s:wm831x_chg address is 0\n",__FUNCTION__);
225 ret = wm831x_auxadc_read_uv(wm831x_chg->wm831x, WM831X_AUX_BATT);
230 static int get_charger_logo_start_num(struct wm831x_chg *wm831x_chg)
232 int rlogonum, bat_vol;
234 /*check charger voltage*/
235 bat_vol = wm831x_read_batt_voltage(wm831x_chg);
236 if(bat_vol <= 3610) {
239 else if(bat_vol <= 3700) {
242 else if(bat_vol <= 3760) {
245 else if(bat_vol <= 3840) {
248 else if(bat_vol <= 3900) {
251 else if(bat_vol <= 3990) {
254 else if(bat_vol <= 4130) {
257 else if(bat_vol <= 4200) {
267 static int wm831x_check_on_pin(struct wm831x_chg *wm831x_chg)
270 ret = wm831x_read_on_pin_status(wm831x_chg);
273 if(wm831x_chg->cnt_on++ > 1000)
274 wm831x_chg->cnt_on = 1000;
278 //control backlight if press on pin
279 if(wm831x_chg->cnt_on >= 1)
281 wm831x_chg->flag_bl = !wm831x_chg->flag_bl;
282 charger_backlight_ctrl(wm831x_chg->flag_bl);
283 wm831x_chg->cnt_on = 0;
284 if(wm831x_chg->flag_bl)
286 wm831x_chg->flag_suspend = 0;
287 wm831x_chg->cnt_disp = 0;
295 static int rk29_charger_display(struct wm831x_chg *wm831x_chg)
298 struct linux_logo* chargerlogo[8];
301 wm831x_chg->flag_chg = wm831x_read_chg_status(wm831x_chg);
302 if(!wm831x_chg->flag_chg)
307 wm831x_chg->flag_chg = wm831x_read_chg_status(wm831x_chg);
308 if(!wm831x_chg->flag_chg)
311 status = wm831x_read_bat_charging_status(wm831x_chg);
314 chargerlogo[i] = g_chargerlogo[i];
316 if(status == BAT_CHARGING)
318 for(i=get_charger_logo_start_num(wm831x_chg); i<8; i++ )
320 wm831x_chg->flag_chg = wm831x_read_chg_status(wm831x_chg);
321 if(!wm831x_chg->flag_chg)
323 if(wm831x_chg->flag_bl != 0)
324 ret = charger_logo_display(chargerlogo[i]);
326 DBG("%s:i=%d\n",__FUNCTION__,i);
329 wm831x_check_on_pin(wm831x_chg);
331 wm831x_check_on_pin(wm831x_chg);
336 else if(status == BAT_DISCHARGING)
338 if(wm831x_chg->flag_bl != 0)
339 charger_logo_display(chargerlogo[7]);
341 wm831x_check_on_pin(wm831x_chg);
343 wm831x_check_on_pin(wm831x_chg);
346 //suspend when timeout(about 50*200ms)
347 if(wm831x_chg->cnt_disp++ > 50)
349 if(wm831x_chg->flag_suspend == 0)
351 wm831x_chg->flag_suspend = 1;
352 wm831x_chg->cnt_disp = 0;
353 wm831x_chg->flag_bl = 0;
354 charger_backlight_ctrl(wm831x_chg->flag_bl);
356 wm831x_chg->cnt_disp = 0;
359 printk("%s,status=%d,cnt_on=%d,cnt_disp=%d\n",__FUNCTION__,status,wm831x_chg->cnt_on,wm831x_chg->cnt_disp);
361 //open system if long time press
362 if(wm831x_chg->cnt_on > 4)
364 wm831x_chg->cnt_on = 0;
365 wm831x_chg->flag_bl = 1;
366 charger_backlight_ctrl(wm831x_chg->flag_bl);
367 wm831x_chg->flag_suspend = 0;
368 wm831x_chg->cnt_disp = 0;
378 static int __devinit wm831x_chg_probe(struct platform_device *pdev)
380 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);;
381 struct wm831x_chg *wm831x_chg;
384 wm831x_chg = kzalloc(sizeof(struct wm831x_chg), GFP_KERNEL);
386 dev_err(&pdev->dev, "Can't allocate data\n");
389 printk("%s:start\n",__FUNCTION__);
390 wm831x_chg->wm831x = wm831x;
391 wm831x_chg->flag_chg = 0;
392 wm831x_chg->logo_id = 0;
393 wm831x_chg->flag_bl = 1;
394 wm831x_chg->cnt_on = 0;
395 wm831x_chg->flag_suspend = 0;
397 platform_set_drvdata(pdev, wm831x_chg);
398 disable_irq_nosync(wm831x_chg->wm831x->irq_base + WM831X_IRQ_ON);
399 ret = rk29_charger_display(wm831x_chg);
400 enable_irq(wm831x_chg->wm831x->irq_base + WM831X_IRQ_ON);
401 wm831x_chg->flag_chg = 0;
402 wm831x_chg->flag_bl = 1;
403 wm831x_chg->cnt_on = 0;
404 wm831x_chg->flag_suspend = 0;
406 printk("%s:exit\n",__FUNCTION__);
412 static int __devexit wm831x_chg_remove(struct platform_device *pdev)
414 struct wm831x_chg *wm831x_chg = platform_get_drvdata(pdev);
421 static struct platform_driver wm831x_chg_driver = {
422 .probe = wm831x_chg_probe,
423 .remove = __devexit_p(wm831x_chg_remove),
425 .name = "wm831x_charger_display",
426 .owner = THIS_MODULE,
430 static int __init wm831x_chg_init(void)
432 return platform_driver_register(&wm831x_chg_driver);
434 late_initcall(wm831x_chg_init);
436 static void __exit wm831x_chg_exit(void)
438 platform_driver_unregister(&wm831x_chg_driver);
440 module_exit(wm831x_chg_exit);
444 MODULE_LICENSE("GPL");
445 MODULE_AUTHOR("linjh<linjh@rock-chips.com>");
446 MODULE_DESCRIPTION("charger display");