| 1 |
1276 |
phoenix |
/*
|
| 2 |
|
|
File: include/asm-arm/sl811-hw.h
|
| 3 |
|
|
|
| 4 |
|
|
19.09.2003 hne@ist1.de
|
| 5 |
|
|
Use Kernel 2.4.20 and this source from 2.4.22
|
| 6 |
|
|
Splitt hardware depens into file sl811-x86.h and sl811-arm.h.
|
| 7 |
|
|
Functions as inline.
|
| 8 |
|
|
|
| 9 |
|
|
23.09.2003 hne
|
| 10 |
|
|
Move Hardware depend header sl811-arm.h into include/asm-arm/sl811-hw.h.
|
| 11 |
|
|
GPRD as parameter.
|
| 12 |
|
|
|
| 13 |
|
|
24.09.2003 hne
|
| 14 |
|
|
Use Offset from ADDR to DATA instand of direct io.
|
| 15 |
|
|
|
| 16 |
|
|
03.10.2003 hne
|
| 17 |
|
|
Low level only for port io into hardware-include.
|
| 18 |
|
|
*/
|
| 19 |
|
|
|
| 20 |
|
|
#ifndef __LINUX_SL811_HW_H
|
| 21 |
|
|
#define __LINUX_SL811_HW_H
|
| 22 |
|
|
|
| 23 |
|
|
#define MAX_CONTROLERS 1 /* Max number of sl811 controllers */
|
| 24 |
|
|
/* Always 1 for this architecture! */
|
| 25 |
|
|
|
| 26 |
|
|
#define SIZEOF_IO_REGION 1 /* Size for request/release region */
|
| 27 |
|
|
|
| 28 |
|
|
#define OFFSET_DATA_REG data_off /* Offset from ADDR_IO to DATA_IO (future) */
|
| 29 |
|
|
/* Can change by arg */
|
| 30 |
|
|
|
| 31 |
|
|
static int io = 0xf100000e; /* Base addr_io */
|
| 32 |
|
|
static int data_off = 1; /* Offset from addr_io to addr_io */
|
| 33 |
|
|
static int irq = 44; /* also change gprd !!! */
|
| 34 |
|
|
static int gprd = 23; /* also change irq !!! */
|
| 35 |
|
|
|
| 36 |
|
|
MODULE_PARM(io,"i");
|
| 37 |
|
|
MODULE_PARM_DESC(io,"sl811 address io port 0xf100000e");
|
| 38 |
|
|
MODULE_PARM(data_off,"i");
|
| 39 |
|
|
MODULE_PARM_DESC(data_off,"sl811 data io port offset from address port (default 1)");
|
| 40 |
|
|
MODULE_PARM(irq,"i");
|
| 41 |
|
|
MODULE_PARM_DESC(irq,"sl811 irq 44(default)");
|
| 42 |
|
|
MODULE_PARM(gprd,"i");
|
| 43 |
|
|
MODULE_PARM_DESC(gprd,"sl811 GPRD port 23(default)");
|
| 44 |
|
|
|
| 45 |
|
|
/*
|
| 46 |
|
|
* Low level: Read from Data port [arm]
|
| 47 |
|
|
*/
|
| 48 |
|
|
static __u8 inline sl811_read_data (struct sl811_hc *hc)
|
| 49 |
|
|
{
|
| 50 |
|
|
__u8 data;
|
| 51 |
|
|
data = readb(hc->data_io);
|
| 52 |
|
|
rmb();
|
| 53 |
|
|
return data;
|
| 54 |
|
|
}
|
| 55 |
|
|
|
| 56 |
|
|
/*
|
| 57 |
|
|
* Low level: Write to index register [arm]
|
| 58 |
|
|
*/
|
| 59 |
|
|
static void inline sl811_write_index (struct sl811_hc *hc, __u8 index)
|
| 60 |
|
|
{
|
| 61 |
|
|
writeb(index, hc->addr_io);
|
| 62 |
|
|
wmb();
|
| 63 |
|
|
}
|
| 64 |
|
|
|
| 65 |
|
|
/*
|
| 66 |
|
|
* Low level: Write to Data port [arm]
|
| 67 |
|
|
*/
|
| 68 |
|
|
static void inline sl811_write_data (struct sl811_hc *hc, __u8 data)
|
| 69 |
|
|
{
|
| 70 |
|
|
writeb(data, hc->data_io);
|
| 71 |
|
|
wmb();
|
| 72 |
|
|
}
|
| 73 |
|
|
|
| 74 |
|
|
/*
|
| 75 |
|
|
* Low level: Write to index register and data port [arm]
|
| 76 |
|
|
*/
|
| 77 |
|
|
static void inline sl811_write_index_data (struct sl811_hc *hc, __u8 index, __u8 data)
|
| 78 |
|
|
{
|
| 79 |
|
|
writeb(index, hc->addr_io);
|
| 80 |
|
|
writeb(data, hc->data_io);
|
| 81 |
|
|
wmb();
|
| 82 |
|
|
}
|
| 83 |
|
|
|
| 84 |
|
|
|
| 85 |
|
|
/*
|
| 86 |
|
|
* This function is board specific. It sets up the interrupt to
|
| 87 |
|
|
* be an edge trigger and trigger on the rising edge
|
| 88 |
|
|
*/
|
| 89 |
|
|
static void inline sl811_init_irq(void)
|
| 90 |
|
|
{
|
| 91 |
|
|
GPDR &= ~(1<<gprd);
|
| 92 |
|
|
set_GPIO_IRQ_edge(1<<gprd, GPIO_RISING_EDGE);
|
| 93 |
|
|
}
|
| 94 |
|
|
|
| 95 |
|
|
/*****************************************************************
|
| 96 |
|
|
*
|
| 97 |
|
|
* Function Name: release_regions [arm]
|
| 98 |
|
|
*
|
| 99 |
|
|
* This function is board specific. It release all io address
|
| 100 |
|
|
* from memory (if can).
|
| 101 |
|
|
*
|
| 102 |
|
|
* Input: struct sl811_hc * *
|
| 103 |
|
|
*
|
| 104 |
|
|
* Return value : 0 = OK
|
| 105 |
|
|
*
|
| 106 |
|
|
*****************************************************************/
|
| 107 |
|
|
static void inline sl811_release_regions(struct sl811_hc *hc)
|
| 108 |
|
|
{
|
| 109 |
|
|
if (hc->addr_io)
|
| 110 |
|
|
release_region(hc->addr_io, SIZEOF_IO_REGION);
|
| 111 |
|
|
hc->addr_io = 0;
|
| 112 |
|
|
|
| 113 |
|
|
if (hc->data_io)
|
| 114 |
|
|
release_region(hc->data_io, SIZEOF_IO_REGION);
|
| 115 |
|
|
hc->data_io = 0;
|
| 116 |
|
|
}
|
| 117 |
|
|
|
| 118 |
|
|
/*****************************************************************
|
| 119 |
|
|
*
|
| 120 |
|
|
* Function Name: request_regions [arm]
|
| 121 |
|
|
*
|
| 122 |
|
|
* This function is board specific. It request all io address and
|
| 123 |
|
|
* maps into memory (if can).
|
| 124 |
|
|
*
|
| 125 |
|
|
* Input: struct sl811_hc *
|
| 126 |
|
|
*
|
| 127 |
|
|
* Return value : 0 = OK
|
| 128 |
|
|
*
|
| 129 |
|
|
*****************************************************************/
|
| 130 |
|
|
static int inline sl811_request_regions (struct sl811_hc *hc, int addr_io, int data_io, const char *name)
|
| 131 |
|
|
{
|
| 132 |
|
|
if (!request_region(addr_io, SIZEOF_IO_REGION, name)) {
|
| 133 |
|
|
PDEBUG(3, "request address %d failed", addr_io);
|
| 134 |
|
|
return -EBUSY;
|
| 135 |
|
|
}
|
| 136 |
|
|
hc->addr_io = addr_io;
|
| 137 |
|
|
|
| 138 |
|
|
if (!request_region(data_io, SIZEOF_IO_REGION, MODNAME)) {
|
| 139 |
|
|
PDEBUG(3, "request address %d failed", data_io);
|
| 140 |
|
|
/* release_region(hc->addr_io, SIZEOF_IO_REGION); */
|
| 141 |
|
|
return -EBUSY;
|
| 142 |
|
|
}
|
| 143 |
|
|
hc->data_io = data_io;
|
| 144 |
|
|
|
| 145 |
|
|
return 0;
|
| 146 |
|
|
}
|
| 147 |
|
|
|
| 148 |
|
|
#endif // __LINUX_SL811_HW_H
|
