diff options
Diffstat (limited to 'arch/sh/cchips/hd6446x/hd64465/gpio.c')
-rw-r--r-- | arch/sh/cchips/hd6446x/hd64465/gpio.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/sh/cchips/hd6446x/hd64465/gpio.c b/arch/sh/cchips/hd6446x/hd64465/gpio.c deleted file mode 100644 index 43431855ec86..000000000000 --- a/arch/sh/cchips/hd6446x/hd64465/gpio.c +++ /dev/null | |||
@@ -1,196 +0,0 @@ | |||
1 | /* | ||
2 | * $Id: gpio.c,v 1.4 2003/05/19 22:24:18 lethal Exp $ | ||
3 | * by Greg Banks <gbanks@pocketpenguins.com> | ||
4 | * (c) 2000 PocketPenguins Inc | ||
5 | * | ||
6 | * GPIO pin support for HD64465 companion chip. | ||
7 | */ | ||
8 | |||
9 | #include <linux/kernel.h> | ||
10 | #include <linux/init.h> | ||
11 | #include <linux/module.h> | ||
12 | #include <linux/sched.h> | ||
13 | #include <linux/ioport.h> | ||
14 | #include <asm/io.h> | ||
15 | #include <asm/hd64465/gpio.h> | ||
16 | |||
17 | #define _PORTOF(portpin) (((portpin)>>3)&0x7) | ||
18 | #define _PINOF(portpin) ((portpin)&0x7) | ||
19 | |||
20 | /* Register addresses parametrised on port */ | ||
21 | #define GPIO_CR(port) (HD64465_REG_GPACR+((port)<<1)) | ||
22 | #define GPIO_DR(port) (HD64465_REG_GPADR+((port)<<1)) | ||
23 | #define GPIO_ICR(port) (HD64465_REG_GPAICR+((port)<<1)) | ||
24 | #define GPIO_ISR(port) (HD64465_REG_GPAISR+((port)<<1)) | ||
25 | |||
26 | #define GPIO_NPORTS 5 | ||
27 | |||
28 | #define MODNAME "hd64465_gpio" | ||
29 | |||
30 | EXPORT_SYMBOL(hd64465_gpio_configure); | ||
31 | EXPORT_SYMBOL(hd64465_gpio_get_pin); | ||
32 | EXPORT_SYMBOL(hd64465_gpio_get_port); | ||
33 | EXPORT_SYMBOL(hd64465_gpio_register_irq); | ||
34 | EXPORT_SYMBOL(hd64465_gpio_set_pin); | ||
35 | EXPORT_SYMBOL(hd64465_gpio_set_port); | ||
36 | EXPORT_SYMBOL(hd64465_gpio_unregister_irq); | ||
37 | |||
38 | /* TODO: each port should be protected with a spinlock */ | ||
39 | |||
40 | |||
41 | void hd64465_gpio_configure(int portpin, int direction) | ||
42 | { | ||
43 | unsigned short cr; | ||
44 | unsigned int shift = (_PINOF(portpin)<<1); | ||
45 | |||
46 | cr = inw(GPIO_CR(_PORTOF(portpin))); | ||
47 | cr &= ~(3<<shift); | ||
48 | cr |= direction<<shift; | ||
49 | outw(cr, GPIO_CR(_PORTOF(portpin))); | ||
50 | } | ||
51 | |||
52 | void hd64465_gpio_set_pin(int portpin, unsigned int value) | ||
53 | { | ||
54 | unsigned short d; | ||
55 | unsigned short mask = 1<<(_PINOF(portpin)); | ||
56 | |||
57 | d = inw(GPIO_DR(_PORTOF(portpin))); | ||
58 | if (value) | ||
59 | d |= mask; | ||
60 | else | ||
61 | d &= ~mask; | ||
62 | outw(d, GPIO_DR(_PORTOF(portpin))); | ||
63 | } | ||
64 | |||
65 | unsigned int hd64465_gpio_get_pin(int portpin) | ||
66 | { | ||
67 | return inw(GPIO_DR(_PORTOF(portpin))) & (1<<(_PINOF(portpin))); | ||
68 | } | ||
69 | |||
70 | /* TODO: for cleaner atomicity semantics, add a mask to this routine */ | ||
71 | |||
72 | void hd64465_gpio_set_port(int port, unsigned int value) | ||
73 | { | ||
74 | outw(value, GPIO_DR(port)); | ||
75 | } | ||
76 | |||
77 | unsigned int hd64465_gpio_get_port(int port) | ||
78 | { | ||
79 | return inw(GPIO_DR(port)); | ||
80 | } | ||
81 | |||
82 | |||
83 | static struct { | ||
84 | void (*func)(int portpin, void *dev); | ||
85 | void *dev; | ||
86 | } handlers[GPIO_NPORTS * 8]; | ||
87 | |||
88 | static irqreturn_t hd64465_gpio_interrupt(int irq, void *dev) | ||
89 | { | ||
90 | unsigned short port, pin, isr, mask, portpin; | ||
91 | |||
92 | for (port=0 ; port<GPIO_NPORTS ; port++) { | ||
93 | isr = inw(GPIO_ISR(port)); | ||
94 | |||
95 | for (pin=0 ; pin<8 ; pin++) { | ||
96 | mask = 1<<pin; | ||
97 | if (isr & mask) { | ||
98 | portpin = (port<<3)|pin; | ||
99 | if (handlers[portpin].func != 0) | ||
100 | handlers[portpin].func(portpin, handlers[portpin].dev); | ||
101 | else | ||
102 | printk(KERN_NOTICE "unexpected GPIO interrupt, pin %c%d\n", | ||
103 | port+'A', (int)pin); | ||
104 | } | ||
105 | } | ||
106 | |||
107 | /* Write 1s back to ISR to clear it? That's what the manual says.. */ | ||
108 | outw(isr, GPIO_ISR(port)); | ||
109 | } | ||
110 | |||
111 | return IRQ_HANDLED; | ||
112 | } | ||
113 | |||
114 | void hd64465_gpio_register_irq(int portpin, int mode, | ||
115 | void (*handler)(int portpin, void *dev), void *dev) | ||
116 | { | ||
117 | unsigned long flags; | ||
118 | unsigned short icr, mask; | ||
119 | |||
120 | if (handler == 0) | ||
121 | return; | ||
122 | |||
123 | local_irq_save(flags); | ||
124 | |||
125 | handlers[portpin].func = handler; | ||
126 | handlers[portpin].dev = dev; | ||
127 | |||
128 | /* | ||
129 | * Configure Interrupt Control Register | ||
130 | */ | ||
131 | icr = inw(GPIO_ICR(_PORTOF(portpin))); | ||
132 | mask = (1<<_PINOF(portpin)); | ||
133 | |||
134 | /* unmask interrupt */ | ||
135 | icr &= ~mask; | ||
136 | |||
137 | /* set TS bit */ | ||
138 | mask <<= 8; | ||
139 | icr &= ~mask; | ||
140 | if (mode == HD64465_GPIO_RISING) | ||
141 | icr |= mask; | ||
142 | |||
143 | outw(icr, GPIO_ICR(_PORTOF(portpin))); | ||
144 | |||
145 | local_irq_restore(flags); | ||
146 | } | ||
147 | |||
148 | void hd64465_gpio_unregister_irq(int portpin) | ||
149 | { | ||
150 | unsigned long flags; | ||
151 | unsigned short icr; | ||
152 | |||
153 | local_irq_save(flags); | ||
154 | |||
155 | /* | ||
156 | * Configure Interrupt Control Register | ||
157 | */ | ||
158 | icr = inw(GPIO_ICR(_PORTOF(portpin))); | ||
159 | icr |= (1<<_PINOF(portpin)); /* mask interrupt */ | ||
160 | outw(icr, GPIO_ICR(_PORTOF(portpin))); | ||
161 | |||
162 | handlers[portpin].func = 0; | ||
163 | handlers[portpin].dev = 0; | ||
164 | |||
165 | local_irq_restore(flags); | ||
166 | } | ||
167 | |||
168 | static int __init hd64465_gpio_init(void) | ||
169 | { | ||
170 | if (!request_region(HD64465_REG_GPACR, 0x1000, MODNAME)) | ||
171 | return -EBUSY; | ||
172 | if (request_irq(HD64465_IRQ_GPIO, hd64465_gpio_interrupt, | ||
173 | IRQF_DISABLED, MODNAME, 0)) | ||
174 | goto out_irqfailed; | ||
175 | |||
176 | printk("HD64465 GPIO layer on irq %d\n", HD64465_IRQ_GPIO); | ||
177 | |||
178 | return 0; | ||
179 | |||
180 | out_irqfailed: | ||
181 | release_region(HD64465_REG_GPACR, 0x1000); | ||
182 | |||
183 | return -EINVAL; | ||
184 | } | ||
185 | |||
186 | static void __exit hd64465_gpio_exit(void) | ||
187 | { | ||
188 | release_region(HD64465_REG_GPACR, 0x1000); | ||
189 | free_irq(HD64465_IRQ_GPIO, 0); | ||
190 | } | ||
191 | |||
192 | module_init(hd64465_gpio_init); | ||
193 | module_exit(hd64465_gpio_exit); | ||
194 | |||
195 | MODULE_LICENSE("GPL"); | ||
196 | |||