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