diff options
Diffstat (limited to 'arch/arm/mach-sa1100/neponset.c')
| -rw-r--r-- | arch/arm/mach-sa1100/neponset.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c new file mode 100644 index 0000000..1405383 --- /dev/null +++ b/arch/arm/mach-sa1100/neponset.c @@ -0,0 +1,342 @@ +/* + * linux/arch/arm/mach-sa1100/neponset.c + * + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/ptrace.h> +#include <linux/tty.h> +#include <linux/ioport.h> +#include <linux/serial_core.h> +#include <linux/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 irqdesc *desc, struct pt_regs *regs) +{ + unsigned int irr; + + while (1) { + struct irqdesc *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); + + if (irr & IRR_ETHERNET) { + d = irq_desc + IRQ_NEPONSET_SMC9196; + d->handle(IRQ_NEPONSET_SMC9196, d, regs); + } + + if (irr & IRR_USAR) { + d = irq_desc + IRQ_NEPONSET_USAR; + d->handle(IRQ_NEPONSET_USAR, d, regs); + } + + desc->chip->unmask(irq); + } + + if (irr & IRR_SA1111) { + d = irq_desc + IRQ_NEPONSET_SA1111; + d->handle(IRQ_NEPONSET_SA1111, d, regs); + } + } +} + +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 __initdata = { + .set_mctrl = neponset_set_mctrl, + .get_mctrl = neponset_get_mctrl, +}; + +static int neponset_probe(struct 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, do_simple_IRQ); + set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE); + set_irq_handler(IRQ_NEPONSET_USAR, do_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 int neponset_suspend(struct device *dev, pm_message_t state, u32 level) +{ + /* + * Save state. + */ + if (level == SUSPEND_SAVE_STATE || + level == SUSPEND_DISABLE || + level == SUSPEND_POWER_DOWN) { + if (!dev->power.saved_state) + dev->power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL); + if (!dev->power.saved_state) + return -ENOMEM; + + *(unsigned int *)dev->power.saved_state = NCR_0; + } + + return 0; +} + +static int neponset_resume(struct device *dev, u32 level) +{ + if (level == RESUME_RESTORE_STATE || level == RESUME_ENABLE) { + if (dev->power.saved_state) { + NCR_0 = *(unsigned int *)dev->power.saved_state; + kfree(dev->power.saved_state); + dev->power.saved_state = NULL; + } + } + + return 0; +} + +#else +#define neponset_suspend NULL +#define neponset_resume NULL +#endif + +static struct device_driver neponset_device_driver = { + .name = "neponset", + .bus = &platform_bus_type, + .probe = neponset_probe, + .suspend = neponset_suspend, + .resume = neponset_resume, +}; + +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, +}; + +static int __init neponset_init(void) +{ + 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 = { + /* virtual physical length type */ + { 0xf3000000, 0x10000000, SZ_1M, MT_DEVICE }, /* System Registers */ + { 0xf4000000, 0x40000000, SZ_1M, MT_DEVICE } /* SA-1111 */ +}; + +void __init neponset_map_io(void) +{ + iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc)); +} |