Viewing file:  h3600.c (5.65 KB) -rw-r--r--
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/*
* linux/arch/arm/mach-sa1100/h3600.c
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/sched.h>
#include <asm/irq.h>
#include <asm/hardware.h>
#include <asm/setup.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>
#include <linux/serial_core.h>
#include "generic.h"
/*
* Bitsy has extended, write-only memory-mapped GPIO's
*/
static int h3600_egpio = EGPIO_H3600_RS232_ON;
void init_h3600_egpio(void)
{
#ifdef CONFIG_IPAQ_H3100
int h3100_controls = (GPIO_H3100_BT_ON
| GPIO_H3100_QMUTE
| GPIO_H3100_LCD_3V_ON
| GPIO_H3100_AUD_ON
| GPIO_H3100_AUD_PWR_ON
| GPIO_H3100_IR_ON
| GPIO_H3100_IR_FSEL);
GPDR |= h3100_controls;
GPCR = h3100_controls;
GAFR = GPIO_SSP_CLK;
#endif
}
void clr_h3600_egpio(unsigned long x)
{
#ifdef CONFIG_IPAQ_H3100
unsigned long gpcr = 0;
if (x&EGPIO_H3600_QMUTE)
gpcr |= GPIO_H3100_QMUTE;
if (x&EGPIO_H3600_LCD_ON)
gpcr |= GPIO_H3100_LCD_3V_ON;
if (x&EGPIO_H3600_AUD_AMP_ON)
gpcr |= GPIO_H3100_AUD_ON;
if (x&EGPIO_H3600_AUD_PWR_ON)
gpcr |= GPIO_H3100_AUD_PWR_ON;
if (x&EGPIO_H3600_IR_ON)
gpcr |= GPIO_H3100_IR_ON;
if (x&EGPIO_H3600_IR_FSEL)
gpcr |= GPIO_H3100_IR_FSEL;
GPCR = gpcr;
#endif
h3600_egpio &= ~x;
H3600_EGPIO = h3600_egpio;
}
void set_h3600_egpio(unsigned long x)
{
#ifdef CONFIG_IPAQ_H3100
unsigned long gpsr = 0;
if (x&EGPIO_H3600_QMUTE)
gpsr |= GPIO_H3100_QMUTE;
if (x&EGPIO_H3600_LCD_ON)
gpsr |= GPIO_H3100_LCD_3V_ON;
if (x&EGPIO_H3600_AUD_AMP_ON)
gpsr |= GPIO_H3100_AUD_ON;
if (x&EGPIO_H3600_AUD_PWR_ON)
gpsr |= GPIO_H3100_AUD_PWR_ON;
if (x&EGPIO_H3600_IR_ON)
gpsr |= GPIO_H3100_IR_ON;
if (x&EGPIO_H3600_IR_FSEL)
gpsr |= GPIO_H3100_IR_FSEL;
GPSR = gpsr;
#endif
h3600_egpio |= x;
H3600_EGPIO = h3600_egpio;
}
EXPORT_SYMBOL(clr_h3600_egpio);
EXPORT_SYMBOL(set_h3600_egpio);
/*
* Low-level UART features.
*
* Note that RTS, CTS and DCD are all active low.
*/
static void h3600_uart_set_mctrl(struct uart_port *port, u_int mctrl)
{
if (port->mapbase == _Ser3UTCR0) {
if (mctrl & TIOCM_RTS)
GPCR = GPIO_H3600_COM_RTS;
else
GPSR = GPIO_H3600_COM_RTS;
}
}
static int h3600_uart_get_mctrl(struct uart_port *port)
{
int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
if (port->mapbase == _Ser3UTCR0) {
int gplr = GPLR;
if (gplr & GPIO_H3600_COM_DCD)
ret &= ~TIOCM_CD;
if (gplr & GPIO_H3600_COM_CTS)
ret &= ~TIOCM_CTS;
}
return ret;
}
static void h3600_dcd_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct uart_info *info = dev_id;
/* Note: should only call this if something has changed */
uart_handle_dcd_change(info, !(GPLR & GPIO_H3600_COM_DCD));
}
static void h3600_cts_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct uart_info *info = dev_id;
/* Note: should only call this if something has changed */
uart_handle_cts_change(info, !(GPLR & GPIO_H3600_COM_CTS));
}
static void h3600_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
if (port->mapbase == _Ser2UTCR0) {
if (state == 0) {
set_h3600_egpio(EGPIO_H3600_IR_ON);
} else {
clr_h3600_egpio(EGPIO_H3600_IR_ON);
}
} else if (port->mapbase == _Ser3UTCR0) {
if (state == 0) {
set_h3600_egpio(EGPIO_H3600_RS232_ON);
} else {
clr_h3600_egpio(EGPIO_H3600_RS232_ON);
}
}
}
static int h3600_uart_open(struct uart_port *port, struct uart_info *info)
{
int ret = 0;
if (port->mapbase == _Ser2UTCR0) {
Ser2UTCR4 = UTCR4_HSE;
Ser2HSCR0 = 0;
Ser2HSSR0 = HSSR0_EIF | HSSR0_TUR |
HSSR0_RAB | HSSR0_FRE;
} else if (port->mapbase == _Ser3UTCR0) {
GPDR &= ~(GPIO_H3600_COM_DCD|GPIO_H3600_COM_CTS);
GPDR |= GPIO_H3600_COM_RTS;
set_GPIO_IRQ_edge(GPIO_H3600_COM_DCD|GPIO_H3600_COM_CTS,
GPIO_BOTH_EDGES);
ret = request_irq(IRQ_GPIO_H3600_COM_DCD, h3600_dcd_intr,
0, "RS232 DCD", info);
if (ret)
return ret;
ret = request_irq(IRQ_GPIO_H3600_COM_CTS, h3600_cts_intr,
0, "RS232 CTS", info);
if (ret)
free_irq(IRQ_GPIO_H3600_COM_DCD, info);
}
return ret;
}
static void h3600_uart_close(struct uart_port *port, struct uart_info *info)
{
if (port->mapbase == _Ser3UTCR0) {
free_irq(IRQ_GPIO_H3600_COM_DCD, info);
free_irq(IRQ_GPIO_H3600_COM_CTS, info);
}
}
static struct sa1100_port_fns h3600_port_fns __initdata = {
set_mctrl: h3600_uart_set_mctrl,
get_mctrl: h3600_uart_get_mctrl,
pm: h3600_uart_pm,
open: h3600_uart_open,
close: h3600_uart_close,
};
static struct map_desc h3600_io_desc[] __initdata = {
/* virtual physical length domain r w c b */
{ 0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 1, 1, 0, 0 }, /* Flash bank 0 */
{ 0xf0000000, 0x49000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* EGPIO 0 */
{ 0xf1000000, 0x10000000, 0x02800000, DOMAIN_IO, 1, 1, 0, 0 }, /* static memory bank 2 */
{ 0xf3800000, 0x40000000, 0x00800000, DOMAIN_IO, 1, 1, 0, 0 }, /* static memory bank 4 */
LAST_DESC
};
static void __init h3600_map_io(void)
{
sa1100_map_io();
iotable_init(h3600_io_desc);
sa1100_register_uart_fns(&h3600_port_fns);
sa1100_register_uart(0, 3);
sa1100_register_uart(1, 1); /* isn't this one driven elsewhere? */
init_h3600_egpio();
/*
* Default GPIO settings.
*/
GPCR = 0x0fffffff;
GPDR = 0x0401f3fc;
/*
* Ensure those pins are outputs and driving low.
*/
PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
/* Configure suspend conditions */
PGSR = 0;
PWER = 0x1 | (1 << 31);
PCFR = PCFR_OPDE | PCFR_FP | PCFR_FS;
}
MACHINE_START(H3600, "Compaq iPAQ")
BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
BOOT_PARAMS(0xc0000100)
MAPIO(h3600_map_io)
INITIRQ(sa1100_init_irq)
MACHINE_END
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