/* * 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 <mach/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 <mach/assabet.h> #include <mach/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) { /* * 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) { generic_handle_irq(IRQ_NEPONSET_SMC9196); } if (irr & IRR_USAR) { generic_handle_irq(IRQ_NEPONSET_USAR); } desc->chip->unmask(irq); } if (irr & IRR_SA1111) { generic_handle_irq(IRQ_NEPONSET_SA1111); } } } 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, IRQ_TYPE_EDGE_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)); }