2 * Battery and Power Management code for the Sharp SL-Cxx00
4 * Copyright (c) 2005 Richard Purdie
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/stat.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <asm/apm-emulation.h>
21 #include <asm/mach-types.h>
22 #include <asm/hardware.h>
23 #include <asm/hardware/scoop.h>
25 #include <asm/arch/sharpsl.h>
26 #include <asm/arch/spitz.h>
27 #include <asm/arch/pxa-regs.h>
30 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
31 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
32 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
33 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
34 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
35 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
37 static int spitz_last_ac_status
;
39 static void spitz_charger_init(void)
41 pxa_gpio_mode(SPITZ_GPIO_KEY_INT
| GPIO_IN
);
42 pxa_gpio_mode(SPITZ_GPIO_SYNC
| GPIO_IN
);
43 sharpsl_pm_pxa_init();
46 static void spitz_measure_temp(int on
)
49 set_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_ADC_TEMP_ON
);
51 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_ADC_TEMP_ON
);
54 static void spitz_charge(int on
)
57 if (sharpsl_pm
.flags
& SHARPSL_SUSPENDED
) {
58 set_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_JK_B
);
59 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_CHRG_ON
);
61 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_JK_B
);
62 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_CHRG_ON
);
65 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_JK_B
);
66 set_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_CHRG_ON
);
70 static void spitz_discharge(int on
)
73 set_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_JK_A
);
75 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_JK_A
);
78 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
79 on the power bus which the green led on spitz provides */
80 static void spitz_discharge1(int on
)
83 set_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_LED_GREEN
);
85 reset_scoop_gpio(&spitzscoop_device
.dev
, SPITZ_SCP_LED_GREEN
);
88 static void spitz_presuspend(void)
90 spitz_last_ac_status
= sharpsl_pm
.machinfo
->read_devdata(SHARPSL_STATUS_ACIN
);
92 /* GPIO Sleep Register */
95 if (machine_is_akita()) {
103 PGSR0
&= ~SPITZ_GPIO_G0_STROBE_BIT
;
104 PGSR1
&= ~SPITZ_GPIO_G1_STROBE_BIT
;
105 PGSR2
&= ~SPITZ_GPIO_G2_STROBE_BIT
;
106 PGSR3
&= ~SPITZ_GPIO_G3_STROBE_BIT
;
107 PGSR2
|= GPIO_bit(SPITZ_GPIO_KEY_STROBE0
);
109 pxa_gpio_mode(GPIO18_RDY
|GPIO_OUT
| GPIO_DFLT_HIGH
);
111 PRER
= GPIO_bit(SPITZ_GPIO_KEY_INT
);
112 PFER
= GPIO_bit(SPITZ_GPIO_KEY_INT
) | GPIO_bit(SPITZ_GPIO_RESET
);
113 PWER
= GPIO_bit(SPITZ_GPIO_KEY_INT
) | GPIO_bit(SPITZ_GPIO_RESET
) | PWER_RTC
;
114 PKWR
= GPIO_bit(SPITZ_GPIO_SYNC
) | GPIO_bit(SPITZ_GPIO_KEY_INT
) | GPIO_bit(SPITZ_GPIO_RESET
);
115 PKSR
= 0xffffffff; // clear
117 /* nRESET_OUT Disable */
120 /* Clear reset status */
121 RCSR
= RCSR_HWR
| RCSR_WDR
| RCSR_SMR
| RCSR_GPR
;
123 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
124 PCFR
= PCFR_GPR_EN
| PCFR_OPDE
;
127 static void spitz_postsuspend(void)
129 pxa_gpio_mode(GPIO18_RDY_MD
);
130 pxa_gpio_mode(10 | GPIO_IN
);
133 static int spitz_should_wakeup(unsigned int resume_on_alarm
)
136 int acin
= sharpsl_pm
.machinfo
->read_devdata(SHARPSL_STATUS_ACIN
);
138 if (spitz_last_ac_status
!= acin
) {
141 sharpsl_pm
.flags
|= SHARPSL_DO_OFFLINE_CHRG
;
142 dev_dbg(sharpsl_pm
.dev
, "AC Inserted\n");
145 dev_dbg(sharpsl_pm
.dev
, "AC Removed\n");
146 sharpsl_pm_led(SHARPSL_LED_OFF
);
147 sharpsl_pm
.machinfo
->charge(0);
148 sharpsl_pm
.charge_mode
= CHRG_OFF
;
150 spitz_last_ac_status
= acin
;
151 /* Return to suspend as this must be what we were woken for */
155 if (PEDR
& GPIO_bit(SPITZ_GPIO_KEY_INT
))
156 is_resume
|= GPIO_bit(SPITZ_GPIO_KEY_INT
);
158 if (PKSR
& GPIO_bit(SPITZ_GPIO_SYNC
))
159 is_resume
|= GPIO_bit(SPITZ_GPIO_SYNC
);
161 if (resume_on_alarm
&& (PEDR
& PWER_RTC
))
162 is_resume
|= PWER_RTC
;
164 dev_dbg(sharpsl_pm
.dev
, "is_resume: %x\n",is_resume
);
168 static unsigned long spitz_charger_wakeup(void)
170 return (~GPLR0
& GPIO_bit(SPITZ_GPIO_KEY_INT
)) | (GPLR0
& GPIO_bit(SPITZ_GPIO_SYNC
));
173 unsigned long spitzpm_read_devdata(int type
)
176 case SHARPSL_STATUS_ACIN
:
177 return (((~GPLR(SPITZ_GPIO_AC_IN
)) & GPIO_bit(SPITZ_GPIO_AC_IN
)) != 0);
178 case SHARPSL_STATUS_LOCK
:
179 return READ_GPIO_BIT(sharpsl_pm
.machinfo
->gpio_batlock
);
180 case SHARPSL_STATUS_CHRGFULL
:
181 return READ_GPIO_BIT(sharpsl_pm
.machinfo
->gpio_batfull
);
182 case SHARPSL_STATUS_FATAL
:
183 return READ_GPIO_BIT(sharpsl_pm
.machinfo
->gpio_fatal
);
184 case SHARPSL_ACIN_VOLT
:
185 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT
);
186 case SHARPSL_BATT_TEMP
:
187 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP
);
188 case SHARPSL_BATT_VOLT
:
190 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT
);
194 struct sharpsl_charger_machinfo spitz_pm_machinfo
= {
195 .init
= spitz_charger_init
,
196 .exit
= sharpsl_pm_pxa_remove
,
197 .gpio_batlock
= SPITZ_GPIO_BAT_COVER
,
198 .gpio_acin
= SPITZ_GPIO_AC_IN
,
199 .gpio_batfull
= SPITZ_GPIO_CHRG_FULL
,
201 .gpio_fatal
= SPITZ_GPIO_FATAL_BAT
,
202 .discharge
= spitz_discharge
,
203 .discharge1
= spitz_discharge1
,
204 .charge
= spitz_charge
,
205 .measure_temp
= spitz_measure_temp
,
206 .presuspend
= spitz_presuspend
,
207 .postsuspend
= spitz_postsuspend
,
208 .read_devdata
= spitzpm_read_devdata
,
209 .charger_wakeup
= spitz_charger_wakeup
,
210 .should_wakeup
= spitz_should_wakeup
,
211 .backlight_limit
= corgibl_limit_intensity
,
212 .charge_on_volt
= SHARPSL_CHARGE_ON_VOLT
,
213 .charge_on_temp
= SHARPSL_CHARGE_ON_TEMP
,
214 .charge_acin_high
= SHARPSL_CHARGE_ON_ACIN_HIGH
,
215 .charge_acin_low
= SHARPSL_CHARGE_ON_ACIN_LOW
,
216 .fatal_acin_volt
= SHARPSL_FATAL_ACIN_VOLT
,
217 .fatal_noacin_volt
= SHARPSL_FATAL_NOACIN_VOLT
,
219 .bat_levels_noac
= spitz_battery_levels_noac
,
220 .bat_levels_acin
= spitz_battery_levels_acin
,
221 .status_high_acin
= 188,
222 .status_low_acin
= 178,
223 .status_high_noac
= 185,
224 .status_low_noac
= 175,
227 static struct platform_device
*spitzpm_device
;
229 static int __devinit
spitzpm_init(void)
233 spitzpm_device
= platform_device_alloc("sharpsl-pm", -1);
237 spitzpm_device
->dev
.platform_data
= &spitz_pm_machinfo
;
238 ret
= platform_device_add(spitzpm_device
);
241 platform_device_put(spitzpm_device
);
246 static void spitzpm_exit(void)
248 platform_device_unregister(spitzpm_device
);
251 module_init(spitzpm_init
);
252 module_exit(spitzpm_exit
);