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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
commitfcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch)
treea57612d1888735a2ec7972891b68c1ac5ec8faea /arch/arm/mach-ks8695
parent8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff)
Added missing tegra files.HEADmaster
Diffstat (limited to 'arch/arm/mach-ks8695')
-rw-r--r--arch/arm/mach-ks8695/gpio.c319
-rw-r--r--arch/arm/mach-ks8695/include/mach/io.h19
-rw-r--r--arch/arm/mach-ks8695/include/mach/regs-timer.h40
-rw-r--r--arch/arm/mach-ks8695/include/mach/system.h48
-rw-r--r--arch/arm/mach-ks8695/include/mach/vmalloc.h19
-rw-r--r--arch/arm/mach-ks8695/leds.c93
6 files changed, 538 insertions, 0 deletions
diff --git a/arch/arm/mach-ks8695/gpio.c b/arch/arm/mach-ks8695/gpio.c
new file mode 100644
index 00000000000..31e456508a6
--- /dev/null
+++ b/arch/arm/mach-ks8695/gpio.c
@@ -0,0 +1,319 @@
1/*
2 * arch/arm/mach-ks8695/gpio.c
3 *
4 * Copyright (C) 2006 Andrew Victor
5 * Updated to GPIOLIB, Copyright 2008 Simtec Electronics
6 * Daniel Silverstone <dsilvers@simtec.co.uk>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <linux/kernel.h>
23#include <linux/mm.h>
24#include <linux/init.h>
25#include <linux/debugfs.h>
26#include <linux/seq_file.h>
27#include <linux/module.h>
28#include <linux/io.h>
29
30#include <mach/hardware.h>
31#include <asm/mach/irq.h>
32
33#include <mach/regs-gpio.h>
34#include <mach/gpio.h>
35
36/*
37 * Configure a GPIO line for either GPIO function, or its internal
38 * function (Interrupt, Timer, etc).
39 */
40static void ks8695_gpio_mode(unsigned int pin, short gpio)
41{
42 unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN };
43 unsigned long x, flags;
44
45 if (pin > KS8695_GPIO_5) /* only GPIO 0..5 have internal functions */
46 return;
47
48 local_irq_save(flags);
49
50 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);
51 if (gpio) /* GPIO: set bit to 0 */
52 x &= ~enable[pin];
53 else /* Internal function: set bit to 1 */
54 x |= enable[pin];
55 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPC);
56
57 local_irq_restore(flags);
58}
59
60
61static unsigned short gpio_irq[] = { KS8695_IRQ_EXTERN0, KS8695_IRQ_EXTERN1, KS8695_IRQ_EXTERN2, KS8695_IRQ_EXTERN3 };
62
63/*
64 * Configure GPIO pin as external interrupt source.
65 */
66int ks8695_gpio_interrupt(unsigned int pin, unsigned int type)
67{
68 unsigned long x, flags;
69
70 if (pin > KS8695_GPIO_3) /* only GPIO 0..3 can generate IRQ */
71 return -EINVAL;
72
73 local_irq_save(flags);
74
75 /* set pin as input */
76 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);
77 x &= ~IOPM(pin);
78 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);
79
80 local_irq_restore(flags);
81
82 /* Set IRQ triggering type */
83 irq_set_irq_type(gpio_irq[pin], type);
84
85 /* enable interrupt mode */
86 ks8695_gpio_mode(pin, 0);
87
88 return 0;
89}
90EXPORT_SYMBOL(ks8695_gpio_interrupt);
91
92
93
94/* .... Generic GPIO interface .............................................. */
95
96/*
97 * Configure the GPIO line as an input.
98 */
99static int ks8695_gpio_direction_input(struct gpio_chip *gc, unsigned int pin)
100{
101 unsigned long x, flags;
102
103 if (pin > KS8695_GPIO_15)
104 return -EINVAL;
105
106 /* set pin to GPIO mode */
107 ks8695_gpio_mode(pin, 1);
108
109 local_irq_save(flags);
110
111 /* set pin as input */
112 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);
113 x &= ~IOPM(pin);
114 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);
115
116 local_irq_restore(flags);
117
118 return 0;
119}
120
121
122/*
123 * Configure the GPIO line as an output, with default state.
124 */
125static int ks8695_gpio_direction_output(struct gpio_chip *gc,
126 unsigned int pin, int state)
127{
128 unsigned long x, flags;
129
130 if (pin > KS8695_GPIO_15)
131 return -EINVAL;
132
133 /* set pin to GPIO mode */
134 ks8695_gpio_mode(pin, 1);
135
136 local_irq_save(flags);
137
138 /* set line state */
139 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);
140 if (state)
141 x |= IOPD(pin);
142 else
143 x &= ~IOPD(pin);
144 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD);
145
146 /* set pin as output */
147 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);
148 x |= IOPM(pin);
149 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);
150
151 local_irq_restore(flags);
152
153 return 0;
154}
155
156
157/*
158 * Set the state of an output GPIO line.
159 */
160static void ks8695_gpio_set_value(struct gpio_chip *gc,
161 unsigned int pin, int state)
162{
163 unsigned long x, flags;
164
165 if (pin > KS8695_GPIO_15)
166 return;
167
168 local_irq_save(flags);
169
170 /* set output line state */
171 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);
172 if (state)
173 x |= IOPD(pin);
174 else
175 x &= ~IOPD(pin);
176 __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD);
177
178 local_irq_restore(flags);
179}
180
181
182/*
183 * Read the state of a GPIO line.
184 */
185static int ks8695_gpio_get_value(struct gpio_chip *gc, unsigned int pin)
186{
187 unsigned long x;
188
189 if (pin > KS8695_GPIO_15)
190 return -EINVAL;
191
192 x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);
193 return (x & IOPD(pin)) != 0;
194}
195
196
197/*
198 * Map GPIO line to IRQ number.
199 */
200static int ks8695_gpio_to_irq(struct gpio_chip *gc, unsigned int pin)
201{
202 if (pin > KS8695_GPIO_3) /* only GPIO 0..3 can generate IRQ */
203 return -EINVAL;
204
205 return gpio_irq[pin];
206}
207
208/*
209 * Map IRQ number to GPIO line.
210 */
211int irq_to_gpio(unsigned int irq)
212{
213 if ((irq < KS8695_IRQ_EXTERN0) || (irq > KS8695_IRQ_EXTERN3))
214 return -EINVAL;
215
216 return (irq - KS8695_IRQ_EXTERN0);
217}
218EXPORT_SYMBOL(irq_to_gpio);
219
220/* GPIOLIB interface */
221
222static struct gpio_chip ks8695_gpio_chip = {
223 .label = "KS8695",
224 .direction_input = ks8695_gpio_direction_input,
225 .direction_output = ks8695_gpio_direction_output,
226 .get = ks8695_gpio_get_value,
227 .set = ks8695_gpio_set_value,
228 .to_irq = ks8695_gpio_to_irq,
229 .base = 0,
230 .ngpio = 16,
231 .can_sleep = 0,
232};
233
234/* Register the GPIOs */
235void ks8695_register_gpios(void)
236{
237 if (gpiochip_add(&ks8695_gpio_chip))
238 printk(KERN_ERR "Unable to register core GPIOs\n");
239}
240
241/* .... Debug interface ..................................................... */
242
243#ifdef CONFIG_DEBUG_FS
244
245static int ks8695_gpio_show(struct seq_file *s, void *unused)
246{
247 unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN };
248 unsigned int intmask[] = { IOPC_IOEINT0TM, IOPC_IOEINT1TM, IOPC_IOEINT2TM, IOPC_IOEINT3TM };
249 unsigned long mode, ctrl, data;
250 int i;
251
252 mode = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);
253 ctrl = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);
254 data = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);
255
256 seq_printf(s, "Pin\tI/O\tFunction\tState\n\n");
257
258 for (i = KS8695_GPIO_0; i <= KS8695_GPIO_15 ; i++) {
259 seq_printf(s, "%i:\t", i);
260
261 seq_printf(s, "%s\t", (mode & IOPM(i)) ? "Output" : "Input");
262
263 if (i <= KS8695_GPIO_3) {
264 if (ctrl & enable[i]) {
265 seq_printf(s, "EXT%i ", i);
266
267 switch ((ctrl & intmask[i]) >> (4 * i)) {
268 case IOPC_TM_LOW:
269 seq_printf(s, "(Low)"); break;
270 case IOPC_TM_HIGH:
271 seq_printf(s, "(High)"); break;
272 case IOPC_TM_RISING:
273 seq_printf(s, "(Rising)"); break;
274 case IOPC_TM_FALLING:
275 seq_printf(s, "(Falling)"); break;
276 case IOPC_TM_EDGE:
277 seq_printf(s, "(Edges)"); break;
278 }
279 }
280 else
281 seq_printf(s, "GPIO\t");
282 }
283 else if (i <= KS8695_GPIO_5) {
284 if (ctrl & enable[i])
285 seq_printf(s, "TOUT%i\t", i - KS8695_GPIO_4);
286 else
287 seq_printf(s, "GPIO\t");
288 }
289 else
290 seq_printf(s, "GPIO\t");
291
292 seq_printf(s, "\t");
293
294 seq_printf(s, "%i\n", (data & IOPD(i)) ? 1 : 0);
295 }
296 return 0;
297}
298
299static int ks8695_gpio_open(struct inode *inode, struct file *file)
300{
301 return single_open(file, ks8695_gpio_show, NULL);
302}
303
304static const struct file_operations ks8695_gpio_operations = {
305 .open = ks8695_gpio_open,
306 .read = seq_read,
307 .llseek = seq_lseek,
308 .release = single_release,
309};
310
311static int __init ks8695_gpio_debugfs_init(void)
312{
313 /* /sys/kernel/debug/ks8695_gpio */
314 (void) debugfs_create_file("ks8695_gpio", S_IFREG | S_IRUGO, NULL, NULL, &ks8695_gpio_operations);
315 return 0;
316}
317postcore_initcall(ks8695_gpio_debugfs_init);
318
319#endif
diff --git a/arch/arm/mach-ks8695/include/mach/io.h b/arch/arm/mach-ks8695/include/mach/io.h
new file mode 100644
index 00000000000..a7a63ac3ba4
--- /dev/null
+++ b/arch/arm/mach-ks8695/include/mach/io.h
@@ -0,0 +1,19 @@
1/*
2 * arch/arm/mach-ks8695/include/mach/io.h
3 *
4 * Copyright (C) 2006 Andrew Victor
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11#ifndef __ASM_ARCH_IO_H
12#define __ASM_ARCH_IO_H
13
14#define IO_SPACE_LIMIT 0xffffffff
15
16#define __io(a) __typesafe_io(a)
17#define __mem_pci(a) (a)
18
19#endif
diff --git a/arch/arm/mach-ks8695/include/mach/regs-timer.h b/arch/arm/mach-ks8695/include/mach/regs-timer.h
new file mode 100644
index 00000000000..e620cda99d2
--- /dev/null
+++ b/arch/arm/mach-ks8695/include/mach/regs-timer.h
@@ -0,0 +1,40 @@
1/*
2 * arch/arm/mach-ks8695/include/mach/regs-timer.h
3 *
4 * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
5 * Copyright (C) 2006 Simtec Electronics
6 *
7 * KS8695 - Timer registers and bit definitions.
8 *
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
12 */
13
14#ifndef KS8695_TIMER_H
15#define KS8695_TIMER_H
16
17#define KS8695_TMR_OFFSET (0xF0000 + 0xE400)
18#define KS8695_TMR_VA (KS8695_IO_VA + KS8695_TMR_OFFSET)
19#define KS8695_TMR_PA (KS8695_IO_PA + KS8695_TMR_OFFSET)
20
21
22/*
23 * Timer registers
24 */
25#define KS8695_TMCON (0x00) /* Timer Control Register */
26#define KS8695_T1TC (0x04) /* Timer 1 Timeout Count Register */
27#define KS8695_T0TC (0x08) /* Timer 0 Timeout Count Register */
28#define KS8695_T1PD (0x0C) /* Timer 1 Pulse Count Register */
29#define KS8695_T0PD (0x10) /* Timer 0 Pulse Count Register */
30
31
32/* Timer Control Register */
33#define TMCON_T1EN (1 << 1) /* Timer 1 Enable */
34#define TMCON_T0EN (1 << 0) /* Timer 0 Enable */
35
36/* Timer0 Timeout Counter Register */
37#define T0TC_WATCHDOG (0xff) /* Enable watchdog mode */
38
39
40#endif
diff --git a/arch/arm/mach-ks8695/include/mach/system.h b/arch/arm/mach-ks8695/include/mach/system.h
new file mode 100644
index 00000000000..fb1dda9be2d
--- /dev/null
+++ b/arch/arm/mach-ks8695/include/mach/system.h
@@ -0,0 +1,48 @@
1/*
2 * arch/arm/mach-s3c2410/include/mach/system.h
3 *
4 * Copyright (C) 2006 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 *
7 * KS8695 - System function defines and includes
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef __ASM_ARCH_SYSTEM_H
15#define __ASM_ARCH_SYSTEM_H
16
17#include <linux/io.h>
18#include <mach/regs-timer.h>
19
20static void arch_idle(void)
21{
22 /*
23 * This should do all the clock switching
24 * and wait for interrupt tricks,
25 */
26 cpu_do_idle();
27
28}
29
30static void arch_reset(char mode, const char *cmd)
31{
32 unsigned int reg;
33
34 if (mode == 's')
35 cpu_reset(0);
36
37 /* disable timer0 */
38 reg = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
39 __raw_writel(reg & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
40
41 /* enable watchdog mode */
42 __raw_writel((10 << 8) | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
43
44 /* re-enable timer0 */
45 __raw_writel(reg | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
46}
47
48#endif
diff --git a/arch/arm/mach-ks8695/include/mach/vmalloc.h b/arch/arm/mach-ks8695/include/mach/vmalloc.h
new file mode 100644
index 00000000000..744ac66be3a
--- /dev/null
+++ b/arch/arm/mach-ks8695/include/mach/vmalloc.h
@@ -0,0 +1,19 @@
1/*
2 * arch/arm/mach-ks8695/include/mach/vmalloc.h
3 *
4 * Copyright (C) 2006 Ben Dooks
5 * Copyright (C) 2006 Simtec Electronics <linux@simtec.co.uk>
6 *
7 * KS8695 vmalloc definition
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef __ASM_ARCH_VMALLOC_H
15#define __ASM_ARCH_VMALLOC_H
16
17#define VMALLOC_END (KS8695_IO_VA & PGDIR_MASK)
18
19#endif
diff --git a/arch/arm/mach-ks8695/leds.c b/arch/arm/mach-ks8695/leds.c
new file mode 100644
index 00000000000..184ef74e4be
--- /dev/null
+++ b/arch/arm/mach-ks8695/leds.c
@@ -0,0 +1,93 @@
1/*
2 * LED driver for KS8695-based boards.
3 *
4 * Copyright (C) Andrew Victor
5 *
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.
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/init.h>
14
15#include <asm/leds.h>
16#include <mach/devices.h>
17#include <mach/gpio.h>
18
19
20static inline void ks8695_led_on(unsigned int led)
21{
22 gpio_set_value(led, 0);
23}
24
25static inline void ks8695_led_off(unsigned int led)
26{
27 gpio_set_value(led, 1);
28}
29
30static inline void ks8695_led_toggle(unsigned int led)
31{
32 unsigned long is_off = gpio_get_value(led);
33 if (is_off)
34 ks8695_led_on(led);
35 else
36 ks8695_led_off(led);
37}
38
39
40/*
41 * Handle LED events.
42 */
43static void ks8695_leds_event(led_event_t evt)
44{
45 unsigned long flags;
46
47 local_irq_save(flags);
48
49 switch(evt) {
50 case led_start: /* System startup */
51 ks8695_led_on(ks8695_leds_cpu);
52 break;
53
54 case led_stop: /* System stop / suspend */
55 ks8695_led_off(ks8695_leds_cpu);
56 break;
57
58#ifdef CONFIG_LEDS_TIMER
59 case led_timer: /* Every 50 timer ticks */
60 ks8695_led_toggle(ks8695_leds_timer);
61 break;
62#endif
63
64#ifdef CONFIG_LEDS_CPU
65 case led_idle_start: /* Entering idle state */
66 ks8695_led_off(ks8695_leds_cpu);
67 break;
68
69 case led_idle_end: /* Exit idle state */
70 ks8695_led_on(ks8695_leds_cpu);
71 break;
72#endif
73
74 default:
75 break;
76 }
77
78 local_irq_restore(flags);
79}
80
81
82static int __init leds_init(void)
83{
84 if ((ks8695_leds_timer == -1) || (ks8695_leds_cpu == -1))
85 return -ENODEV;
86
87 leds_event = ks8695_leds_event;
88
89 leds_event(led_start);
90 return 0;
91}
92
93__initcall(leds_init);