You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
347 lines
7.4 KiB
347 lines
7.4 KiB
/*
|
|
* linux/arch/arm/mach-sa1100/neponset.c
|
|
*
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/mach/serial_sa1100.h>
|
|
#include <asm/arch/assabet.h>
|
|
#include <asm/arch/neponset.h>
|
|
#include <asm/hardware/sa1111.h>
|
|
#include <asm/sizes.h>
|
|
|
|
/*
|
|
* Install handler for Neponset IRQ. Note that we have to loop here
|
|
* since the ETHERNET and USAR IRQs are level based, and we need to
|
|
* ensure that the IRQ signal is deasserted before returning. This
|
|
* is rather unfortunate.
|
|
*/
|
|
static void
|
|
neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
unsigned int irr;
|
|
|
|
while (1) {
|
|
struct irq_desc *d;
|
|
|
|
/*
|
|
* Acknowledge the parent IRQ.
|
|
*/
|
|
desc->chip->ack(irq);
|
|
|
|
/*
|
|
* Read the interrupt reason register. Let's have all
|
|
* active IRQ bits high. Note: there is a typo in the
|
|
* Neponset user's guide for the SA1111 IRR level.
|
|
*/
|
|
irr = IRR ^ (IRR_ETHERNET | IRR_USAR);
|
|
|
|
if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
|
|
break;
|
|
|
|
/*
|
|
* Since there is no individual mask, we have to
|
|
* mask the parent IRQ. This is safe, since we'll
|
|
* recheck the register for any pending IRQs.
|
|
*/
|
|
if (irr & (IRR_ETHERNET | IRR_USAR)) {
|
|
desc->chip->mask(irq);
|
|
|
|
/*
|
|
* Ack the interrupt now to prevent re-entering
|
|
* this neponset handler. Again, this is safe
|
|
* since we'll check the IRR register prior to
|
|
* leaving.
|
|
*/
|
|
desc->chip->ack(irq);
|
|
|
|
if (irr & IRR_ETHERNET) {
|
|
d = irq_desc + IRQ_NEPONSET_SMC9196;
|
|
desc_handle_irq(IRQ_NEPONSET_SMC9196, d);
|
|
}
|
|
|
|
if (irr & IRR_USAR) {
|
|
d = irq_desc + IRQ_NEPONSET_USAR;
|
|
desc_handle_irq(IRQ_NEPONSET_USAR, d);
|
|
}
|
|
|
|
desc->chip->unmask(irq);
|
|
}
|
|
|
|
if (irr & IRR_SA1111) {
|
|
d = irq_desc + IRQ_NEPONSET_SA1111;
|
|
desc_handle_irq(IRQ_NEPONSET_SA1111, d);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
|
|
{
|
|
u_int mdm_ctl0 = MDM_CTL_0;
|
|
|
|
if (port->mapbase == _Ser1UTCR0) {
|
|
if (mctrl & TIOCM_RTS)
|
|
mdm_ctl0 &= ~MDM_CTL0_RTS2;
|
|
else
|
|
mdm_ctl0 |= MDM_CTL0_RTS2;
|
|
|
|
if (mctrl & TIOCM_DTR)
|
|
mdm_ctl0 &= ~MDM_CTL0_DTR2;
|
|
else
|
|
mdm_ctl0 |= MDM_CTL0_DTR2;
|
|
} else if (port->mapbase == _Ser3UTCR0) {
|
|
if (mctrl & TIOCM_RTS)
|
|
mdm_ctl0 &= ~MDM_CTL0_RTS1;
|
|
else
|
|
mdm_ctl0 |= MDM_CTL0_RTS1;
|
|
|
|
if (mctrl & TIOCM_DTR)
|
|
mdm_ctl0 &= ~MDM_CTL0_DTR1;
|
|
else
|
|
mdm_ctl0 |= MDM_CTL0_DTR1;
|
|
}
|
|
|
|
MDM_CTL_0 = mdm_ctl0;
|
|
}
|
|
|
|
static u_int neponset_get_mctrl(struct uart_port *port)
|
|
{
|
|
u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
|
|
u_int mdm_ctl1 = MDM_CTL_1;
|
|
|
|
if (port->mapbase == _Ser1UTCR0) {
|
|
if (mdm_ctl1 & MDM_CTL1_DCD2)
|
|
ret &= ~TIOCM_CD;
|
|
if (mdm_ctl1 & MDM_CTL1_CTS2)
|
|
ret &= ~TIOCM_CTS;
|
|
if (mdm_ctl1 & MDM_CTL1_DSR2)
|
|
ret &= ~TIOCM_DSR;
|
|
} else if (port->mapbase == _Ser3UTCR0) {
|
|
if (mdm_ctl1 & MDM_CTL1_DCD1)
|
|
ret &= ~TIOCM_CD;
|
|
if (mdm_ctl1 & MDM_CTL1_CTS1)
|
|
ret &= ~TIOCM_CTS;
|
|
if (mdm_ctl1 & MDM_CTL1_DSR1)
|
|
ret &= ~TIOCM_DSR;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct sa1100_port_fns neponset_port_fns __devinitdata = {
|
|
.set_mctrl = neponset_set_mctrl,
|
|
.get_mctrl = neponset_get_mctrl,
|
|
};
|
|
|
|
static int __devinit neponset_probe(struct platform_device *dev)
|
|
{
|
|
sa1100_register_uart_fns(&neponset_port_fns);
|
|
|
|
/*
|
|
* Install handler for GPIO25.
|
|
*/
|
|
set_irq_type(IRQ_GPIO25, IRQT_RISING);
|
|
set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler);
|
|
|
|
/*
|
|
* We would set IRQ_GPIO25 to be a wake-up IRQ, but
|
|
* unfortunately something on the Neponset activates
|
|
* this IRQ on sleep (ethernet?)
|
|
*/
|
|
#if 0
|
|
enable_irq_wake(IRQ_GPIO25);
|
|
#endif
|
|
|
|
/*
|
|
* Setup other Neponset IRQs. SA1111 will be done by the
|
|
* generic SA1111 code.
|
|
*/
|
|
set_irq_handler(IRQ_NEPONSET_SMC9196, handle_simple_irq);
|
|
set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
|
|
set_irq_handler(IRQ_NEPONSET_USAR, handle_simple_irq);
|
|
set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
|
|
|
|
/*
|
|
* Disable GPIO 0/1 drivers so the buttons work on the module.
|
|
*/
|
|
NCR_0 = NCR_GP01_OFF;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/*
|
|
* LDM power management.
|
|
*/
|
|
static unsigned int neponset_saved_state;
|
|
|
|
static int neponset_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
/*
|
|
* Save state.
|
|
*/
|
|
neponset_saved_state = NCR_0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int neponset_resume(struct platform_device *dev)
|
|
{
|
|
NCR_0 = neponset_saved_state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define neponset_suspend NULL
|
|
#define neponset_resume NULL
|
|
#endif
|
|
|
|
static struct platform_driver neponset_device_driver = {
|
|
.probe = neponset_probe,
|
|
.suspend = neponset_suspend,
|
|
.resume = neponset_resume,
|
|
.driver = {
|
|
.name = "neponset",
|
|
},
|
|
};
|
|
|
|
static struct resource neponset_resources[] = {
|
|
[0] = {
|
|
.start = 0x10000000,
|
|
.end = 0x17ffffff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
};
|
|
|
|
static struct platform_device neponset_device = {
|
|
.name = "neponset",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(neponset_resources),
|
|
.resource = neponset_resources,
|
|
};
|
|
|
|
static struct resource sa1111_resources[] = {
|
|
[0] = {
|
|
.start = 0x40000000,
|
|
.end = 0x40001fff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = IRQ_NEPONSET_SA1111,
|
|
.end = IRQ_NEPONSET_SA1111,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static u64 sa1111_dmamask = 0xffffffffUL;
|
|
|
|
static struct platform_device sa1111_device = {
|
|
.name = "sa1111",
|
|
.id = 0,
|
|
.dev = {
|
|
.dma_mask = &sa1111_dmamask,
|
|
.coherent_dma_mask = 0xffffffff,
|
|
},
|
|
.num_resources = ARRAY_SIZE(sa1111_resources),
|
|
.resource = sa1111_resources,
|
|
};
|
|
|
|
static struct resource smc91x_resources[] = {
|
|
[0] = {
|
|
.name = "smc91x-regs",
|
|
.start = SA1100_CS3_PHYS,
|
|
.end = SA1100_CS3_PHYS + 0x01ffffff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = IRQ_NEPONSET_SMC9196,
|
|
.end = IRQ_NEPONSET_SMC9196,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
[2] = {
|
|
.name = "smc91x-attrib",
|
|
.start = SA1100_CS3_PHYS + 0x02000000,
|
|
.end = SA1100_CS3_PHYS + 0x03ffffff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
};
|
|
|
|
static struct platform_device smc91x_device = {
|
|
.name = "smc91x",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(smc91x_resources),
|
|
.resource = smc91x_resources,
|
|
};
|
|
|
|
static struct platform_device *devices[] __initdata = {
|
|
&neponset_device,
|
|
&sa1111_device,
|
|
&smc91x_device,
|
|
};
|
|
|
|
extern void sa1110_mb_disable(void);
|
|
|
|
static int __init neponset_init(void)
|
|
{
|
|
platform_driver_register(&neponset_device_driver);
|
|
|
|
/*
|
|
* The Neponset is only present on the Assabet machine type.
|
|
*/
|
|
if (!machine_is_assabet())
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Ensure that the memory bus request/grant signals are setup,
|
|
* and the grant is held in its inactive state, whether or not
|
|
* we actually have a Neponset attached.
|
|
*/
|
|
sa1110_mb_disable();
|
|
|
|
if (!machine_has_neponset()) {
|
|
printk(KERN_DEBUG "Neponset expansion board not present\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (WHOAMI != 0x11) {
|
|
printk(KERN_WARNING "Neponset board detected, but "
|
|
"wrong ID: %02x\n", WHOAMI);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return platform_add_devices(devices, ARRAY_SIZE(devices));
|
|
}
|
|
|
|
subsys_initcall(neponset_init);
|
|
|
|
static struct map_desc neponset_io_desc[] __initdata = {
|
|
{ /* System Registers */
|
|
.virtual = 0xf3000000,
|
|
.pfn = __phys_to_pfn(0x10000000),
|
|
.length = SZ_1M,
|
|
.type = MT_DEVICE
|
|
}, { /* SA-1111 */
|
|
.virtual = 0xf4000000,
|
|
.pfn = __phys_to_pfn(0x40000000),
|
|
.length = SZ_1M,
|
|
.type = MT_DEVICE
|
|
}
|
|
};
|
|
|
|
void __init neponset_map_io(void)
|
|
{
|
|
iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
|
|
}
|
|
|