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linux-sg2042/arch/arm/mach-footbridge/netwinder-hw.c

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/*
* linux/arch/arm/mach-footbridge/netwinder-hw.c
*
* Netwinder machine fixup
*
* Copyright (C) 1998, 1999 Russell King, Phil Blundell
*/
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <asm/hardware/dec21285.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/system_misc.h>
#include <asm/mach/arch.h>
#include "common.h"
#define IRDA_IO_BASE 0x180
#define GP1_IO_BASE 0x338
#define GP2_IO_BASE 0x33a
/*
* Winbond WB83977F accessibility stuff
*/
static inline void wb977_open(void)
{
outb(0x87, 0x370);
outb(0x87, 0x370);
}
static inline void wb977_close(void)
{
outb(0xaa, 0x370);
}
static inline void wb977_wb(int reg, int val)
{
outb(reg, 0x370);
outb(val, 0x371);
}
static inline void wb977_ww(int reg, int val)
{
outb(reg, 0x370);
outb(val >> 8, 0x371);
outb(reg + 1, 0x370);
outb(val & 255, 0x371);
}
#define wb977_device_select(dev) wb977_wb(0x07, dev)
#define wb977_device_disable() wb977_wb(0x30, 0x00)
#define wb977_device_enable() wb977_wb(0x30, 0x01)
/*
* This is a lock for accessing ports GP1_IO_BASE and GP2_IO_BASE
*/
DEFINE_RAW_SPINLOCK(nw_gpio_lock);
EXPORT_SYMBOL(nw_gpio_lock);
static unsigned int current_gpio_op;
static unsigned int current_gpio_io;
static unsigned int current_cpld;
void nw_gpio_modify_op(unsigned int mask, unsigned int set)
{
unsigned int new_gpio, changed;
new_gpio = (current_gpio_op & ~mask) | set;
changed = new_gpio ^ current_gpio_op;
current_gpio_op = new_gpio;
if (changed & 0xff)
outb(new_gpio, GP1_IO_BASE);
if (changed & 0xff00)
outb(new_gpio >> 8, GP2_IO_BASE);
}
EXPORT_SYMBOL(nw_gpio_modify_op);
static inline void __gpio_modify_io(int mask, int in)
{
unsigned int new_gpio, changed;
int port;
new_gpio = (current_gpio_io & ~mask) | in;
changed = new_gpio ^ current_gpio_io;
current_gpio_io = new_gpio;
changed >>= 1;
new_gpio >>= 1;
wb977_device_select(7);
for (port = 0xe1; changed && port < 0xe8; changed >>= 1) {
wb977_wb(port, new_gpio & 1);
port += 1;
new_gpio >>= 1;
}
wb977_device_select(8);
for (port = 0xe8; changed && port < 0xec; changed >>= 1) {
wb977_wb(port, new_gpio & 1);
port += 1;
new_gpio >>= 1;
}
}
void nw_gpio_modify_io(unsigned int mask, unsigned int in)
{
/* Open up the SuperIO chip */
wb977_open();
__gpio_modify_io(mask, in);
/* Close up the EFER gate */
wb977_close();
}
EXPORT_SYMBOL(nw_gpio_modify_io);
unsigned int nw_gpio_read(void)
{
return inb(GP1_IO_BASE) | inb(GP2_IO_BASE) << 8;
}
EXPORT_SYMBOL(nw_gpio_read);
/*
* Initialise the Winbond W83977F global registers
*/
static inline void wb977_init_global(void)
{
/*
* Enable R/W config registers
*/
wb977_wb(0x26, 0x40);
/*
* Power down FDC (not used)
*/
wb977_wb(0x22, 0xfe);
/*
* GP12, GP11, CIRRX, IRRXH, GP10
*/
wb977_wb(0x2a, 0xc1);
/*
* GP23, GP22, GP21, GP20, GP13
*/
wb977_wb(0x2b, 0x6b);
/*
* GP17, GP16, GP15, GP14
*/
wb977_wb(0x2c, 0x55);
}
/*
* Initialise the Winbond W83977F printer port
*/
static inline void wb977_init_printer(void)
{
wb977_device_select(1);
/*
* mode 1 == EPP
*/
wb977_wb(0xf0, 0x01);
}
/*
* Initialise the Winbond W83977F keyboard controller
*/
static inline void wb977_init_keyboard(void)
{
wb977_device_select(5);
/*
* Keyboard controller address
*/
wb977_ww(0x60, 0x0060);
wb977_ww(0x62, 0x0064);
/*
* Keyboard IRQ 1, active high, edge trigger
*/
wb977_wb(0x70, 1);
wb977_wb(0x71, 0x02);
/*
* Mouse IRQ 5, active high, edge trigger
*/
wb977_wb(0x72, 5);
wb977_wb(0x73, 0x02);
/*
* KBC 8MHz
*/
wb977_wb(0xf0, 0x40);
/*
* Enable device
*/
wb977_device_enable();
}
/*
* Initialise the Winbond W83977F Infra-Red device
*/
static inline void wb977_init_irda(void)
{
wb977_device_select(6);
/*
* IR base address
*/
wb977_ww(0x60, IRDA_IO_BASE);
/*
* IRDA IRQ 6, active high, edge trigger
*/
wb977_wb(0x70, 6);
wb977_wb(0x71, 0x02);
/*
* RX DMA - ISA DMA 0
*/
wb977_wb(0x74, 0x00);
/*
* TX DMA - Disable Tx DMA
*/
wb977_wb(0x75, 0x04);
/*
* Append CRC, Enable bank selection
*/
wb977_wb(0xf0, 0x03);
/*
* Enable device
*/
wb977_device_enable();
}
/*
* Initialise Winbond W83977F general purpose IO
*/
static inline void wb977_init_gpio(void)
{
unsigned long flags;
/*
* Set up initial I/O definitions
*/
current_gpio_io = -1;
__gpio_modify_io(-1, GPIO_DONE | GPIO_WDTIMER);
wb977_device_select(7);
/*
* Group1 base address
*/
wb977_ww(0x60, GP1_IO_BASE);
wb977_ww(0x62, 0);
wb977_ww(0x64, 0);
/*
* GP10 (Orage button) IRQ 10, active high, edge trigger
*/
wb977_wb(0x70, 10);
wb977_wb(0x71, 0x02);
/*
* GP10: Debounce filter enabled, IRQ, input
*/
wb977_wb(0xe0, 0x19);
/*
* Enable Group1
*/
wb977_device_enable();
wb977_device_select(8);
/*
* Group2 base address
*/
wb977_ww(0x60, GP2_IO_BASE);
/*
* Clear watchdog timer regs
* - timer disable
*/
wb977_wb(0xf2, 0x00);
/*
* - disable LED, no mouse nor keyboard IRQ
*/
wb977_wb(0xf3, 0x00);
/*
* - timer counting, disable power LED, disable timeouot
*/
wb977_wb(0xf4, 0x00);
/*
* Enable group2
*/
wb977_device_enable();
/*
* Set Group1/Group2 outputs
*/
raw_spin_lock_irqsave(&nw_gpio_lock, flags);
nw_gpio_modify_op(-1, GPIO_RED_LED | GPIO_FAN);
raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
}
/*
* Initialise the Winbond W83977F chip.
*/
static void __init wb977_init(void)
{
request_region(0x370, 2, "W83977AF configuration");
/*
* Open up the SuperIO chip
*/
wb977_open();
/*
* Initialise the global registers
*/
wb977_init_global();
/*
* Initialise the various devices in
* the multi-IO chip.
*/
wb977_init_printer();
wb977_init_keyboard();
wb977_init_irda();
wb977_init_gpio();
/*
* Close up the EFER gate
*/
wb977_close();
}
void nw_cpld_modify(unsigned int mask, unsigned int set)
{
int msk;
current_cpld = (current_cpld & ~mask) | set;
nw_gpio_modify_io(GPIO_DATA | GPIO_IOCLK | GPIO_IOLOAD, 0);
nw_gpio_modify_op(GPIO_IOLOAD, 0);
for (msk = 8; msk; msk >>= 1) {
int bit = current_cpld & msk;
nw_gpio_modify_op(GPIO_DATA | GPIO_IOCLK, bit ? GPIO_DATA : 0);
nw_gpio_modify_op(GPIO_IOCLK, GPIO_IOCLK);
}
nw_gpio_modify_op(GPIO_IOCLK|GPIO_DATA, 0);
nw_gpio_modify_op(GPIO_IOLOAD|GPIO_DSCLK, GPIO_IOLOAD|GPIO_DSCLK);
nw_gpio_modify_op(GPIO_IOLOAD, 0);
}
EXPORT_SYMBOL(nw_cpld_modify);
static void __init cpld_init(void)
{
unsigned long flags;
raw_spin_lock_irqsave(&nw_gpio_lock, flags);
nw_cpld_modify(-1, CPLD_UNMUTE | CPLD_7111_DISABLE);
raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
}
static unsigned char rwa_unlock[] __initdata =
{ 0x00, 0x00, 0x6a, 0xb5, 0xda, 0xed, 0xf6, 0xfb, 0x7d, 0xbe, 0xdf, 0x6f, 0x37, 0x1b,
0x0d, 0x86, 0xc3, 0x61, 0xb0, 0x58, 0x2c, 0x16, 0x8b, 0x45, 0xa2, 0xd1, 0xe8, 0x74,
0x3a, 0x9d, 0xce, 0xe7, 0x73, 0x39 };
#ifndef DEBUG
#define dprintk(x...)
#else
#define dprintk(x...) printk(x)
#endif
#define WRITE_RWA(r,v) do { outb((r), 0x279); udelay(10); outb((v), 0xa79); } while (0)
static inline void rwa010_unlock(void)
{
int i;
WRITE_RWA(2, 2);
mdelay(10);
for (i = 0; i < sizeof(rwa_unlock); i++) {
outb(rwa_unlock[i], 0x279);
udelay(10);
}
}
static inline void rwa010_read_ident(void)
{
unsigned char si[9];
int i, j;
WRITE_RWA(3, 0);
WRITE_RWA(0, 128);
outb(1, 0x279);
mdelay(1);
dprintk("Identifier: ");
for (i = 0; i < 9; i++) {
si[i] = 0;
for (j = 0; j < 8; j++) {
int bit;
udelay(250);
inb(0x203);
udelay(250);
bit = inb(0x203);
dprintk("%02X ", bit);
bit = (bit == 0xaa) ? 1 : 0;
si[i] |= bit << j;
}
dprintk("(%02X) ", si[i]);
}
dprintk("\n");
}
static inline void rwa010_global_init(void)
{
WRITE_RWA(6, 2); // Assign a card no = 2
dprintk("Card no = %d\n", inb(0x203));
/* disable the modem section of the chip */
WRITE_RWA(7, 3);
WRITE_RWA(0x30, 0);
/* disable the cdrom section of the chip */
WRITE_RWA(7, 4);
WRITE_RWA(0x30, 0);
/* disable the MPU-401 section of the chip */
WRITE_RWA(7, 2);
WRITE_RWA(0x30, 0);
}
static inline void rwa010_game_port_init(void)
{
int i;
WRITE_RWA(7, 5);
dprintk("Slider base: ");
WRITE_RWA(0x61, 1);
i = inb(0x203);
WRITE_RWA(0x60, 2);
dprintk("%02X%02X (201)\n", inb(0x203), i);
WRITE_RWA(0x30, 1);
}
static inline void rwa010_waveartist_init(int base, int irq, int dma)
{
int i;
WRITE_RWA(7, 0);
dprintk("WaveArtist base: ");
WRITE_RWA(0x61, base & 255);
i = inb(0x203);
WRITE_RWA(0x60, base >> 8);
dprintk("%02X%02X (%X),", inb(0x203), i, base);
WRITE_RWA(0x70, irq);
dprintk(" irq: %d (%d),", inb(0x203), irq);
WRITE_RWA(0x74, dma);
dprintk(" dma: %d (%d)\n", inb(0x203), dma);
WRITE_RWA(0x30, 1);
}
static inline void rwa010_soundblaster_init(int sb_base, int al_base, int irq, int dma)
{
int i;
WRITE_RWA(7, 1);
dprintk("SoundBlaster base: ");
WRITE_RWA(0x61, sb_base & 255);
i = inb(0x203);
WRITE_RWA(0x60, sb_base >> 8);
dprintk("%02X%02X (%X),", inb(0x203), i, sb_base);
dprintk(" irq: ");
WRITE_RWA(0x70, irq);
dprintk("%d (%d),", inb(0x203), irq);
dprintk(" 8-bit DMA: ");
WRITE_RWA(0x74, dma);
dprintk("%d (%d)\n", inb(0x203), dma);
dprintk("AdLib base: ");
WRITE_RWA(0x63, al_base & 255);
i = inb(0x203);
WRITE_RWA(0x62, al_base >> 8);
dprintk("%02X%02X (%X)\n", inb(0x203), i, al_base);
WRITE_RWA(0x30, 1);
}
static void rwa010_soundblaster_reset(void)
{
int i;
outb(1, 0x226);
udelay(3);
outb(0, 0x226);
for (i = 0; i < 5; i++) {
if (inb(0x22e) & 0x80)
break;
mdelay(1);
}
if (i == 5)
printk("SoundBlaster: DSP reset failed\n");
dprintk("SoundBlaster DSP reset: %02X (AA)\n", inb(0x22a));
for (i = 0; i < 5; i++) {
if ((inb(0x22c) & 0x80) == 0)
break;
mdelay(1);
}
if (i == 5)
printk("SoundBlaster: DSP not ready\n");
else {
outb(0xe1, 0x22c);
dprintk("SoundBlaster DSP id: ");
i = inb(0x22a);
udelay(1);
i |= inb(0x22a) << 8;
dprintk("%04X\n", i);
for (i = 0; i < 5; i++) {
if ((inb(0x22c) & 0x80) == 0)
break;
mdelay(1);
}
if (i == 5)
printk("SoundBlaster: could not turn speaker off\n");
outb(0xd3, 0x22c);
}
/* turn on OPL3 */
outb(5, 0x38a);
outb(1, 0x38b);
}
static void __init rwa010_init(void)
{
rwa010_unlock();
rwa010_read_ident();
rwa010_global_init();
rwa010_game_port_init();
rwa010_waveartist_init(0x250, 3, 7);
rwa010_soundblaster_init(0x220, 0x388, 3, 1);
rwa010_soundblaster_reset();
}
/*
* Initialise any other hardware after we've got the PCI bus
* initialised. We may need the PCI bus to talk to this other
* hardware.
*/
static int __init nw_hw_init(void)
{
if (machine_is_netwinder()) {
wb977_init();
cpld_init();
rwa010_init();
}
return 0;
}
__initcall(nw_hw_init);
/*
* Older NeTTroms either do not provide a parameters
* page, or they don't supply correct information in
* the parameter page.
*/
static void __init
fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
{
#ifdef CONFIG_ISAPNP
extern int isapnp_disable;
/*
* We must not use the kernels ISAPnP code
* on the NetWinder - it will reset the settings
* for the WaveArtist chip and render it inoperable.
*/
isapnp_disable = 1;
#endif
}
static void netwinder_restart(enum reboot_mode mode, const char *cmd)
{
if (mode == REBOOT_SOFT) {
/* Jump into the ROM */
soft_restart(0x41000000);
} else {
local_irq_disable();
local_fiq_disable();
/* open up the SuperIO chip */
outb(0x87, 0x370);
outb(0x87, 0x370);
/* aux function group 1 (logical device 7) */
outb(0x07, 0x370);
outb(0x07, 0x371);
/* set GP16 for WD-TIMER output */
outb(0xe6, 0x370);
outb(0x00, 0x371);
/* set a RED LED and toggle WD_TIMER for rebooting */
outb(0xc4, 0x338);
}
}
/* LEDs */
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
struct netwinder_led {
struct led_classdev cdev;
u8 mask;
};
/*
* The triggers lines up below will only be used if the
* LED triggers are compiled in.
*/
static const struct {
const char *name;
const char *trigger;
} netwinder_leds[] = {
{ "netwinder:green", "heartbeat", },
{ "netwinder:red", "cpu0", },
};
/*
* The LED control in Netwinder is reversed:
* - setting bit means turn off LED
* - clearing bit means turn on LED
*/
static void netwinder_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
struct netwinder_led *led = container_of(cdev,
struct netwinder_led, cdev);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&nw_gpio_lock, flags);
reg = nw_gpio_read();
if (b != LED_OFF)
reg &= ~led->mask;
else
reg |= led->mask;
nw_gpio_modify_op(led->mask, reg);
spin_unlock_irqrestore(&nw_gpio_lock, flags);
}
static enum led_brightness netwinder_led_get(struct led_classdev *cdev)
{
struct netwinder_led *led = container_of(cdev,
struct netwinder_led, cdev);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&nw_gpio_lock, flags);
reg = nw_gpio_read();
spin_unlock_irqrestore(&nw_gpio_lock, flags);
return (reg & led->mask) ? LED_OFF : LED_FULL;
}
static int __init netwinder_leds_init(void)
{
int i;
if (!machine_is_netwinder())
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(netwinder_leds); i++) {
struct netwinder_led *led;
led = kzalloc(sizeof(*led), GFP_KERNEL);
if (!led)
break;
led->cdev.name = netwinder_leds[i].name;
led->cdev.brightness_set = netwinder_led_set;
led->cdev.brightness_get = netwinder_led_get;
led->cdev.default_trigger = netwinder_leds[i].trigger;
if (i == 0)
led->mask = GPIO_GREEN_LED;
else
led->mask = GPIO_RED_LED;
if (led_classdev_register(NULL, &led->cdev) < 0) {
kfree(led);
break;
}
}
return 0;
}
/*
* Since we may have triggers on any subsystem, defer registration
* until after subsystem_init.
*/
fs_initcall(netwinder_leds_init);
#endif
MACHINE_START(NETWINDER, "Rebel-NetWinder")
/* Maintainer: Russell King/Rebel.com */
.atag_offset = 0x100,
.video_start = 0x000a0000,
.video_end = 0x000bffff,
.reserve_lp0 = 1,
.reserve_lp2 = 1,
.fixup = fixup_netwinder,
.map_io = footbridge_map_io,
.init_irq = footbridge_init_irq,
.init_time = isa_timer_init,
.restart = netwinder_restart,
MACHINE_END
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