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authorLennert Buytenhek <buytenh@wantstofly.org>2006-03-20 12:10:14 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-03-21 17:06:12 -0500
commita8e19667a42d752f3eca6eaa17aa5d6f93066dfe (patch)
tree7bf3b7eb8ac3fb6c18b3a8c33a88d6d2158f45e4
parente7736d47a11a771ba87314be563b2cb6b8d11d14 (diff)
[ARM] 3371/1: ep93xx: gpio support
Patch from Lennert Buytenhek Add support for setting the direction of and getting/setting the value of the 64 GPIO lines. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-ep93xx/core.c68
-rw-r--r--include/asm-arm/arch-ep93xx/ep93xx-regs.h1
-rw-r--r--include/asm-arm/arch-ep93xx/gpio.h107
3 files changed, 176 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index f831f74dc8cc..7d3e79990fad 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -45,6 +45,7 @@
45#include <asm/mach/map.h> 45#include <asm/mach/map.h>
46#include <asm/mach/time.h> 46#include <asm/mach/time.h>
47#include <asm/mach/irq.h> 47#include <asm/mach/irq.h>
48#include <asm/arch/gpio.h>
48 49
49#include <asm/hardware/vic.h> 50#include <asm/hardware/vic.h>
50 51
@@ -147,6 +148,73 @@ struct sys_timer ep93xx_timer = {
147 148
148 149
149/************************************************************************* 150/*************************************************************************
151 * GPIO handling for EP93xx
152 *************************************************************************/
153static unsigned char data_register_offset[8] = {
154 0x00, 0x04, 0x08, 0x0c, 0x20, 0x30, 0x38, 0x40,
155};
156
157static unsigned char data_direction_register_offset[8] = {
158 0x10, 0x14, 0x18, 0x1c, 0x24, 0x34, 0x3c, 0x44,
159};
160
161void gpio_line_config(int line, int direction)
162{
163 unsigned int data_direction_register;
164 unsigned long flags;
165 unsigned char v;
166
167 data_direction_register =
168 EP93XX_GPIO_REG(data_direction_register_offset[line >> 3]);
169
170 local_irq_save(flags);
171 if (direction == GPIO_OUT) {
172 v = __raw_readb(data_direction_register);
173 v |= 1 << (line & 7);
174 __raw_writeb(v, data_direction_register);
175 } else if (direction == GPIO_IN) {
176 v = __raw_readb(data_direction_register);
177 v &= ~(1 << (line & 7));
178 __raw_writeb(v, data_direction_register);
179 }
180 local_irq_restore(flags);
181}
182EXPORT_SYMBOL(gpio_line_config);
183
184int gpio_line_get(int line)
185{
186 unsigned int data_register;
187
188 data_register = EP93XX_GPIO_REG(data_register_offset[line >> 3]);
189
190 return !!(__raw_readb(data_register) & (1 << (line & 7)));
191}
192EXPORT_SYMBOL(gpio_line_get);
193
194void gpio_line_set(int line, int value)
195{
196 unsigned int data_register;
197 unsigned long flags;
198 unsigned char v;
199
200 data_register = EP93XX_GPIO_REG(data_register_offset[line >> 3]);
201
202 local_irq_save(flags);
203 if (value == EP93XX_GPIO_HIGH) {
204 v = __raw_readb(data_register);
205 v |= 1 << (line & 7);
206 __raw_writeb(v, data_register);
207 } else if (value == EP93XX_GPIO_LOW) {
208 v = __raw_readb(data_register);
209 v &= ~(1 << (line & 7));
210 __raw_writeb(v, data_register);
211 }
212 local_irq_restore(flags);
213}
214EXPORT_SYMBOL(gpio_line_set);
215
216
217/*************************************************************************
150 * EP93xx IRQ handling 218 * EP93xx IRQ handling
151 *************************************************************************/ 219 *************************************************************************/
152void __init ep93xx_init_irq(void) 220void __init ep93xx_init_irq(void)
diff --git a/include/asm-arm/arch-ep93xx/ep93xx-regs.h b/include/asm-arm/arch-ep93xx/ep93xx-regs.h
index 693f23886e85..c1efacc83b75 100644
--- a/include/asm-arm/arch-ep93xx/ep93xx-regs.h
+++ b/include/asm-arm/arch-ep93xx/ep93xx-regs.h
@@ -71,6 +71,7 @@
71#define EP93XX_SECURITY_BASE (EP93XX_APB_VIRT_BASE + 0x00030000) 71#define EP93XX_SECURITY_BASE (EP93XX_APB_VIRT_BASE + 0x00030000)
72 72
73#define EP93XX_GPIO_BASE (EP93XX_APB_VIRT_BASE + 0x00040000) 73#define EP93XX_GPIO_BASE (EP93XX_APB_VIRT_BASE + 0x00040000)
74#define EP93XX_GPIO_REG(x) (EP93XX_GPIO_BASE + (x))
74 75
75#define EP93XX_AAC_BASE (EP93XX_APB_VIRT_BASE + 0x00080000) 76#define EP93XX_AAC_BASE (EP93XX_APB_VIRT_BASE + 0x00080000)
76 77
diff --git a/include/asm-arm/arch-ep93xx/gpio.h b/include/asm-arm/arch-ep93xx/gpio.h
new file mode 100644
index 000000000000..1ee14a14cba0
--- /dev/null
+++ b/include/asm-arm/arch-ep93xx/gpio.h
@@ -0,0 +1,107 @@
1/*
2 * linux/include/asm-arm/arch-ep93xx/gpio.h
3 */
4
5#ifndef __ASM_ARCH_GPIO_H
6#define __ASM_ARCH_GPIO_H
7
8#define GPIO_IN 0
9#define GPIO_OUT 1
10
11#define EP93XX_GPIO_LOW 0
12#define EP93XX_GPIO_HIGH 1
13
14extern void gpio_line_config(int line, int direction);
15extern int gpio_line_get(int line);
16extern void gpio_line_set(int line, int value);
17
18/* GPIO port A. */
19#define EP93XX_GPIO_LINE_A(x) ((x) + 0)
20#define EP93XX_GPIO_LINE_EGPIO0 EP93XX_GPIO_LINE_A(0)
21#define EP93XX_GPIO_LINE_EGPIO1 EP93XX_GPIO_LINE_A(1)
22#define EP93XX_GPIO_LINE_EGPIO2 EP93XX_GPIO_LINE_A(2)
23#define EP93XX_GPIO_LINE_EGPIO3 EP93XX_GPIO_LINE_A(3)
24#define EP93XX_GPIO_LINE_EGPIO4 EP93XX_GPIO_LINE_A(4)
25#define EP93XX_GPIO_LINE_EGPIO5 EP93XX_GPIO_LINE_A(5)
26#define EP93XX_GPIO_LINE_EGPIO6 EP93XX_GPIO_LINE_A(6)
27#define EP93XX_GPIO_LINE_EGPIO7 EP93XX_GPIO_LINE_A(7)
28
29/* GPIO port B. */
30#define EP93XX_GPIO_LINE_B(x) ((x) + 8)
31#define EP93XX_GPIO_LINE_EGPIO8 EP93XX_GPIO_LINE_B(0)
32#define EP93XX_GPIO_LINE_EGPIO9 EP93XX_GPIO_LINE_B(1)
33#define EP93XX_GPIO_LINE_EGPIO10 EP93XX_GPIO_LINE_B(2)
34#define EP93XX_GPIO_LINE_EGPIO11 EP93XX_GPIO_LINE_B(3)
35#define EP93XX_GPIO_LINE_EGPIO12 EP93XX_GPIO_LINE_B(4)
36#define EP93XX_GPIO_LINE_EGPIO13 EP93XX_GPIO_LINE_B(5)
37#define EP93XX_GPIO_LINE_EGPIO14 EP93XX_GPIO_LINE_B(6)
38#define EP93XX_GPIO_LINE_EGPIO15 EP93XX_GPIO_LINE_B(7)
39
40/* GPIO port C. */
41#define EP93XX_GPIO_LINE_C(x) ((x) + 16)
42#define EP93XX_GPIO_LINE_ROW0 EP93XX_GPIO_LINE_C(0)
43#define EP93XX_GPIO_LINE_ROW1 EP93XX_GPIO_LINE_C(1)
44#define EP93XX_GPIO_LINE_ROW2 EP93XX_GPIO_LINE_C(2)
45#define EP93XX_GPIO_LINE_ROW3 EP93XX_GPIO_LINE_C(3)
46#define EP93XX_GPIO_LINE_ROW4 EP93XX_GPIO_LINE_C(4)
47#define EP93XX_GPIO_LINE_ROW5 EP93XX_GPIO_LINE_C(5)
48#define EP93XX_GPIO_LINE_ROW6 EP93XX_GPIO_LINE_C(6)
49#define EP93XX_GPIO_LINE_ROW7 EP93XX_GPIO_LINE_C(7)
50
51/* GPIO port D. */
52#define EP93XX_GPIO_LINE_D(x) ((x) + 24)
53#define EP93XX_GPIO_LINE_COL0 EP93XX_GPIO_LINE_D(0)
54#define EP93XX_GPIO_LINE_COL1 EP93XX_GPIO_LINE_D(1)
55#define EP93XX_GPIO_LINE_COL2 EP93XX_GPIO_LINE_D(2)
56#define EP93XX_GPIO_LINE_COL3 EP93XX_GPIO_LINE_D(3)
57#define EP93XX_GPIO_LINE_COL4 EP93XX_GPIO_LINE_D(4)
58#define EP93XX_GPIO_LINE_COL5 EP93XX_GPIO_LINE_D(5)
59#define EP93XX_GPIO_LINE_COL6 EP93XX_GPIO_LINE_D(6)
60#define EP93XX_GPIO_LINE_COL7 EP93XX_GPIO_LINE_D(7)
61
62/* GPIO port E. */
63#define EP93XX_GPIO_LINE_E(x) ((x) + 32)
64#define EP93XX_GPIO_LINE_GRLED EP93XX_GPIO_LINE_E(0)
65#define EP93XX_GPIO_LINE_RDLED EP93XX_GPIO_LINE_E(1)
66#define EP93XX_GPIO_LINE_DIORn EP93XX_GPIO_LINE_E(2)
67#define EP93XX_GPIO_LINE_IDECS1n EP93XX_GPIO_LINE_E(3)
68#define EP93XX_GPIO_LINE_IDECS2n EP93XX_GPIO_LINE_E(4)
69#define EP93XX_GPIO_LINE_IDEDA0 EP93XX_GPIO_LINE_E(5)
70#define EP93XX_GPIO_LINE_IDEDA1 EP93XX_GPIO_LINE_E(6)
71#define EP93XX_GPIO_LINE_IDEDA2 EP93XX_GPIO_LINE_E(7)
72
73/* GPIO port F. */
74#define EP93XX_GPIO_LINE_F(x) ((x) + 40)
75#define EP93XX_GPIO_LINE_WP EP93XX_GPIO_LINE_F(0)
76#define EP93XX_GPIO_LINE_MCCD1 EP93XX_GPIO_LINE_F(1)
77#define EP93XX_GPIO_LINE_MCCD2 EP93XX_GPIO_LINE_F(2)
78#define EP93XX_GPIO_LINE_MCBVD1 EP93XX_GPIO_LINE_F(3)
79#define EP93XX_GPIO_LINE_MCBVD2 EP93XX_GPIO_LINE_F(4)
80#define EP93XX_GPIO_LINE_VS1 EP93XX_GPIO_LINE_F(5)
81#define EP93XX_GPIO_LINE_READY EP93XX_GPIO_LINE_F(6)
82#define EP93XX_GPIO_LINE_VS2 EP93XX_GPIO_LINE_F(7)
83
84/* GPIO port G. */
85#define EP93XX_GPIO_LINE_G(x) ((x) + 48)
86#define EP93XX_GPIO_LINE_EECLK EP93XX_GPIO_LINE_G(0)
87#define EP93XX_GPIO_LINE_EEDAT EP93XX_GPIO_LINE_G(1)
88#define EP93XX_GPIO_LINE_SLA0 EP93XX_GPIO_LINE_G(2)
89#define EP93XX_GPIO_LINE_SLA1 EP93XX_GPIO_LINE_G(3)
90#define EP93XX_GPIO_LINE_DD12 EP93XX_GPIO_LINE_G(4)
91#define EP93XX_GPIO_LINE_DD13 EP93XX_GPIO_LINE_G(5)
92#define EP93XX_GPIO_LINE_DD14 EP93XX_GPIO_LINE_G(6)
93#define EP93XX_GPIO_LINE_DD15 EP93XX_GPIO_LINE_G(7)
94
95/* GPIO port H. */
96#define EP93XX_GPIO_LINE_H(x) ((x) + 56)
97#define EP93XX_GPIO_LINE_DD0 EP93XX_GPIO_LINE_H(0)
98#define EP93XX_GPIO_LINE_DD1 EP93XX_GPIO_LINE_H(1)
99#define EP93XX_GPIO_LINE_DD2 EP93XX_GPIO_LINE_H(2)
100#define EP93XX_GPIO_LINE_DD3 EP93XX_GPIO_LINE_H(3)
101#define EP93XX_GPIO_LINE_DD4 EP93XX_GPIO_LINE_H(4)
102#define EP93XX_GPIO_LINE_DD5 EP93XX_GPIO_LINE_H(5)
103#define EP93XX_GPIO_LINE_DD6 EP93XX_GPIO_LINE_H(6)
104#define EP93XX_GPIO_LINE_DD7 EP93XX_GPIO_LINE_H(7)
105
106
107#endif