| /* |
| * 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)); |
| } |