1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Battery and Power Management code for the Sharp SL-Cxx00 |
4 | * |
5 | * Copyright (c) 2005 Richard Purdie |
6 | */ |
7 | |
8 | #include <linux/module.h> |
9 | #include <linux/stat.h> |
10 | #include <linux/init.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/delay.h> |
13 | #include <linux/gpio.h> |
14 | #include <linux/gpio-pxa.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/apm-emulation.h> |
18 | #include <linux/spi/corgi_lcd.h> |
19 | |
20 | #include <asm/irq.h> |
21 | #include <asm/mach-types.h> |
22 | |
23 | #include "spitz.h" |
24 | #include "pxa27x.h" |
25 | #include "sharpsl_pm.h" |
26 | |
27 | #include "generic.h" |
28 | |
29 | #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ |
30 | #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ |
31 | #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ |
32 | #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ |
33 | #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ |
34 | #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ |
35 | |
36 | static int spitz_last_ac_status; |
37 | |
38 | static struct gpio spitz_charger_gpios[] = { |
39 | { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, |
40 | { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, |
41 | { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" }, |
42 | { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, |
43 | { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, |
44 | { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, |
45 | }; |
46 | |
47 | static void spitz_charger_init(void) |
48 | { |
49 | gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); |
50 | } |
51 | |
52 | static void spitz_measure_temp(int on) |
53 | { |
54 | gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, value: on); |
55 | } |
56 | |
57 | static void spitz_charge(int on) |
58 | { |
59 | if (on) { |
60 | if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { |
61 | gpio_set_value(SPITZ_GPIO_JK_B, value: 1); |
62 | gpio_set_value(SPITZ_GPIO_CHRG_ON, value: 0); |
63 | } else { |
64 | gpio_set_value(SPITZ_GPIO_JK_B, value: 0); |
65 | gpio_set_value(SPITZ_GPIO_CHRG_ON, value: 0); |
66 | } |
67 | } else { |
68 | gpio_set_value(SPITZ_GPIO_JK_B, value: 0); |
69 | gpio_set_value(SPITZ_GPIO_CHRG_ON, value: 1); |
70 | } |
71 | } |
72 | |
73 | static void spitz_discharge(int on) |
74 | { |
75 | gpio_set_value(SPITZ_GPIO_JK_A, value: on); |
76 | } |
77 | |
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) |
81 | { |
82 | gpio_set_value(SPITZ_GPIO_LED_GREEN, value: on); |
83 | } |
84 | |
85 | static unsigned long gpio18_config = GPIO18_GPIO; |
86 | |
87 | static void spitz_presuspend(void) |
88 | { |
89 | spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); |
90 | |
91 | /* GPIO Sleep Register */ |
92 | PGSR0 = 0x00144018; |
93 | PGSR1 = 0x00EF0000; |
94 | if (machine_is_akita()) { |
95 | PGSR2 = 0x2121C000; |
96 | PGSR3 = 0x00600400; |
97 | } else { |
98 | PGSR2 = 0x0121C000; |
99 | PGSR3 = 0x00600000; |
100 | } |
101 | |
102 | PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; |
103 | PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; |
104 | PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; |
105 | PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; |
106 | PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); |
107 | |
108 | pxa2xx_mfp_config(mfp_cfgs: &gpio18_config, num: 1); |
109 | gpio_request_one(gpio: 18, GPIOF_OUT_INIT_HIGH, label: "Unknown" ); |
110 | gpio_free(gpio: 18); |
111 | |
112 | PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); |
113 | PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); |
114 | PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; |
115 | PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); |
116 | PKSR = 0xffffffff; /* clear */ |
117 | |
118 | /* nRESET_OUT Disable */ |
119 | PSLR |= PSLR_SL_ROD; |
120 | |
121 | /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ |
122 | PCFR = PCFR_GPR_EN | PCFR_OPDE; |
123 | } |
124 | |
125 | static void spitz_postsuspend(void) |
126 | { |
127 | } |
128 | |
129 | static int spitz_should_wakeup(unsigned int resume_on_alarm) |
130 | { |
131 | int is_resume = 0; |
132 | int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); |
133 | |
134 | if (spitz_last_ac_status != acin) { |
135 | if (acin) { |
136 | /* charge on */ |
137 | sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; |
138 | dev_dbg(sharpsl_pm.dev, "AC Inserted\n" ); |
139 | } else { |
140 | /* charge off */ |
141 | dev_dbg(sharpsl_pm.dev, "AC Removed\n" ); |
142 | sharpsl_pm_led(SHARPSL_LED_OFF); |
143 | sharpsl_pm.machinfo->charge(0); |
144 | sharpsl_pm.charge_mode = CHRG_OFF; |
145 | } |
146 | spitz_last_ac_status = acin; |
147 | /* Return to suspend as this must be what we were woken for */ |
148 | return 0; |
149 | } |
150 | |
151 | if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) |
152 | is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); |
153 | |
154 | if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) |
155 | is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); |
156 | |
157 | if (resume_on_alarm && (PEDR & PWER_RTC)) |
158 | is_resume |= PWER_RTC; |
159 | |
160 | dev_dbg(sharpsl_pm.dev, "is_resume: %x\n" , is_resume); |
161 | return is_resume; |
162 | } |
163 | |
164 | static bool spitz_charger_wakeup(void) |
165 | { |
166 | return !gpio_get_value(SPITZ_GPIO_KEY_INT) || |
167 | gpio_get_value(SPITZ_GPIO_SYNC); |
168 | } |
169 | |
170 | static unsigned long spitzpm_read_devdata(int type) |
171 | { |
172 | switch (type) { |
173 | case SHARPSL_STATUS_ACIN: |
174 | return !gpio_get_value(SPITZ_GPIO_AC_IN); |
175 | case SHARPSL_STATUS_LOCK: |
176 | return gpio_get_value(gpio: sharpsl_pm.machinfo->gpio_batlock); |
177 | case SHARPSL_STATUS_CHRGFULL: |
178 | return gpio_get_value(gpio: sharpsl_pm.machinfo->gpio_batfull); |
179 | case SHARPSL_STATUS_FATAL: |
180 | return gpio_get_value(gpio: sharpsl_pm.machinfo->gpio_fatal); |
181 | case SHARPSL_ACIN_VOLT: |
182 | return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); |
183 | case SHARPSL_BATT_TEMP: |
184 | return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); |
185 | case SHARPSL_BATT_VOLT: |
186 | default: |
187 | return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); |
188 | } |
189 | } |
190 | |
191 | struct sharpsl_charger_machinfo spitz_pm_machinfo = { |
192 | .init = spitz_charger_init, |
193 | .exit = NULL, |
194 | .gpio_batlock = SPITZ_GPIO_BAT_COVER, |
195 | .gpio_acin = SPITZ_GPIO_AC_IN, |
196 | .gpio_batfull = SPITZ_GPIO_CHRG_FULL, |
197 | .batfull_irq = 1, |
198 | .gpio_fatal = SPITZ_GPIO_FATAL_BAT, |
199 | .discharge = spitz_discharge, |
200 | .discharge1 = spitz_discharge1, |
201 | .charge = spitz_charge, |
202 | .measure_temp = spitz_measure_temp, |
203 | .presuspend = spitz_presuspend, |
204 | .postsuspend = spitz_postsuspend, |
205 | .read_devdata = spitzpm_read_devdata, |
206 | .charger_wakeup = spitz_charger_wakeup, |
207 | .should_wakeup = spitz_should_wakeup, |
208 | #if defined(CONFIG_LCD_CORGI) |
209 | .backlight_limit = corgi_lcd_limit_intensity, |
210 | #endif |
211 | .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, |
212 | .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, |
213 | .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, |
214 | .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, |
215 | .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, |
216 | .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, |
217 | .bat_levels = 40, |
218 | .bat_levels_noac = sharpsl_battery_levels_noac, |
219 | .bat_levels_acin = sharpsl_battery_levels_acin, |
220 | .status_high_acin = 188, |
221 | .status_low_acin = 178, |
222 | .status_high_noac = 185, |
223 | .status_low_noac = 175, |
224 | }; |
225 | |
226 | static struct platform_device *spitzpm_device; |
227 | |
228 | static int spitzpm_init(void) |
229 | { |
230 | int ret; |
231 | |
232 | if (!machine_is_spitz() && !machine_is_akita() |
233 | && !machine_is_borzoi()) |
234 | return -ENODEV; |
235 | |
236 | spitzpm_device = platform_device_alloc(name: "sharpsl-pm" , id: -1); |
237 | if (!spitzpm_device) |
238 | return -ENOMEM; |
239 | |
240 | spitzpm_device->dev.platform_data = &spitz_pm_machinfo; |
241 | ret = platform_device_add(pdev: spitzpm_device); |
242 | |
243 | if (ret) |
244 | platform_device_put(pdev: spitzpm_device); |
245 | |
246 | return ret; |
247 | } |
248 | |
249 | static void spitzpm_exit(void) |
250 | { |
251 | platform_device_unregister(spitzpm_device); |
252 | } |
253 | |
254 | module_init(spitzpm_init); |
255 | module_exit(spitzpm_exit); |
256 | |