11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/arm/mach-sa1100/neponset.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds */ 51da177e4SLinus Torvalds #include <linux/kernel.h> 61da177e4SLinus Torvalds #include <linux/init.h> 71da177e4SLinus Torvalds #include <linux/ptrace.h> 81da177e4SLinus Torvalds #include <linux/tty.h> 91da177e4SLinus Torvalds #include <linux/ioport.h> 101da177e4SLinus Torvalds #include <linux/serial_core.h> 11d052d1beSRussell King #include <linux/platform_device.h> 121da177e4SLinus Torvalds #include <linux/slab.h> 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <asm/hardware.h> 151da177e4SLinus Torvalds #include <asm/mach-types.h> 161da177e4SLinus Torvalds #include <asm/irq.h> 171da177e4SLinus Torvalds #include <asm/mach/map.h> 181da177e4SLinus Torvalds #include <asm/mach/irq.h> 191da177e4SLinus Torvalds #include <asm/mach/serial_sa1100.h> 201da177e4SLinus Torvalds #include <asm/arch/assabet.h> 211da177e4SLinus Torvalds #include <asm/arch/neponset.h> 221da177e4SLinus Torvalds #include <asm/hardware/sa1111.h> 231da177e4SLinus Torvalds #include <asm/sizes.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds /* 261da177e4SLinus Torvalds * Install handler for Neponset IRQ. Note that we have to loop here 271da177e4SLinus Torvalds * since the ETHERNET and USAR IRQs are level based, and we need to 281da177e4SLinus Torvalds * ensure that the IRQ signal is deasserted before returning. This 291da177e4SLinus Torvalds * is rather unfortunate. 301da177e4SLinus Torvalds */ 311da177e4SLinus Torvalds static void 321da177e4SLinus Torvalds neponset_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) 331da177e4SLinus Torvalds { 341da177e4SLinus Torvalds unsigned int irr; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds while (1) { 371da177e4SLinus Torvalds struct irqdesc *d; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds /* 401da177e4SLinus Torvalds * Acknowledge the parent IRQ. 411da177e4SLinus Torvalds */ 421da177e4SLinus Torvalds desc->chip->ack(irq); 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds /* 451da177e4SLinus Torvalds * Read the interrupt reason register. Let's have all 461da177e4SLinus Torvalds * active IRQ bits high. Note: there is a typo in the 471da177e4SLinus Torvalds * Neponset user's guide for the SA1111 IRR level. 481da177e4SLinus Torvalds */ 491da177e4SLinus Torvalds irr = IRR ^ (IRR_ETHERNET | IRR_USAR); 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) 521da177e4SLinus Torvalds break; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* 551da177e4SLinus Torvalds * Since there is no individual mask, we have to 561da177e4SLinus Torvalds * mask the parent IRQ. This is safe, since we'll 571da177e4SLinus Torvalds * recheck the register for any pending IRQs. 581da177e4SLinus Torvalds */ 591da177e4SLinus Torvalds if (irr & (IRR_ETHERNET | IRR_USAR)) { 601da177e4SLinus Torvalds desc->chip->mask(irq); 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds if (irr & IRR_ETHERNET) { 631da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_SMC9196; 64664399e1SRussell King desc_handle_irq(IRQ_NEPONSET_SMC9196, d, regs); 651da177e4SLinus Torvalds } 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds if (irr & IRR_USAR) { 681da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_USAR; 69664399e1SRussell King desc_handle_irq(IRQ_NEPONSET_USAR, d, regs); 701da177e4SLinus Torvalds } 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds desc->chip->unmask(irq); 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds if (irr & IRR_SA1111) { 761da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_SA1111; 77664399e1SRussell King desc_handle_irq(IRQ_NEPONSET_SA1111, d, regs); 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) 831da177e4SLinus Torvalds { 841da177e4SLinus Torvalds u_int mdm_ctl0 = MDM_CTL_0; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 871da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 881da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS2; 891da177e4SLinus Torvalds else 901da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS2; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 931da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR2; 941da177e4SLinus Torvalds else 951da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR2; 961da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 971da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 981da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS1; 991da177e4SLinus Torvalds else 1001da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS1; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 1031da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR1; 1041da177e4SLinus Torvalds else 1051da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR1; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds MDM_CTL_0 = mdm_ctl0; 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static u_int neponset_get_mctrl(struct uart_port *port) 1121da177e4SLinus Torvalds { 1131da177e4SLinus Torvalds u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 1141da177e4SLinus Torvalds u_int mdm_ctl1 = MDM_CTL_1; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 1171da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD2) 1181da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1191da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS2) 1201da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1211da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR2) 1221da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1231da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 1241da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD1) 1251da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1261da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS1) 1271da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1281da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR1) 1291da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds return ret; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static struct sa1100_port_fns neponset_port_fns __initdata = { 1361da177e4SLinus Torvalds .set_mctrl = neponset_set_mctrl, 1371da177e4SLinus Torvalds .get_mctrl = neponset_get_mctrl, 1381da177e4SLinus Torvalds }; 1391da177e4SLinus Torvalds 1403ae5eaecSRussell King static int neponset_probe(struct platform_device *dev) 1411da177e4SLinus Torvalds { 1421da177e4SLinus Torvalds sa1100_register_uart_fns(&neponset_port_fns); 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds /* 1451da177e4SLinus Torvalds * Install handler for GPIO25. 1461da177e4SLinus Torvalds */ 1471da177e4SLinus Torvalds set_irq_type(IRQ_GPIO25, IRQT_RISING); 1481da177e4SLinus Torvalds set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds /* 1511da177e4SLinus Torvalds * We would set IRQ_GPIO25 to be a wake-up IRQ, but 1521da177e4SLinus Torvalds * unfortunately something on the Neponset activates 1531da177e4SLinus Torvalds * this IRQ on sleep (ethernet?) 1541da177e4SLinus Torvalds */ 1551da177e4SLinus Torvalds #if 0 1561da177e4SLinus Torvalds enable_irq_wake(IRQ_GPIO25); 1571da177e4SLinus Torvalds #endif 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* 1601da177e4SLinus Torvalds * Setup other Neponset IRQs. SA1111 will be done by the 1611da177e4SLinus Torvalds * generic SA1111 code. 1621da177e4SLinus Torvalds */ 1631da177e4SLinus Torvalds set_irq_handler(IRQ_NEPONSET_SMC9196, do_simple_IRQ); 1641da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE); 1651da177e4SLinus Torvalds set_irq_handler(IRQ_NEPONSET_USAR, do_simple_IRQ); 1661da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE); 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* 1691da177e4SLinus Torvalds * Disable GPIO 0/1 drivers so the buttons work on the module. 1701da177e4SLinus Torvalds */ 1711da177e4SLinus Torvalds NCR_0 = NCR_GP01_OFF; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds return 0; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds #ifdef CONFIG_PM 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds /* 1791da177e4SLinus Torvalds * LDM power management. 1801da177e4SLinus Torvalds */ 1813ae5eaecSRussell King static int neponset_suspend(struct platform_device *dev, pm_message_t state) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds /* 1841da177e4SLinus Torvalds * Save state. 1851da177e4SLinus Torvalds */ 1863ae5eaecSRussell King if (!dev->dev.power.saved_state) 1873ae5eaecSRussell King dev->dev.power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL); 1883ae5eaecSRussell King if (!dev->dev.power.saved_state) 1891da177e4SLinus Torvalds return -ENOMEM; 1901da177e4SLinus Torvalds 1913ae5eaecSRussell King *(unsigned int *)dev->dev.power.saved_state = NCR_0; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds return 0; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1963ae5eaecSRussell King static int neponset_resume(struct platform_device *dev) 1971da177e4SLinus Torvalds { 1983ae5eaecSRussell King if (dev->dev.power.saved_state) { 1993ae5eaecSRussell King NCR_0 = *(unsigned int *)dev->dev.power.saved_state; 2003ae5eaecSRussell King kfree(dev->dev.power.saved_state); 2013ae5eaecSRussell King dev->dev.power.saved_state = NULL; 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds return 0; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds #else 2081da177e4SLinus Torvalds #define neponset_suspend NULL 2091da177e4SLinus Torvalds #define neponset_resume NULL 2101da177e4SLinus Torvalds #endif 2111da177e4SLinus Torvalds 2123ae5eaecSRussell King static struct platform_driver neponset_device_driver = { 2131da177e4SLinus Torvalds .probe = neponset_probe, 2141da177e4SLinus Torvalds .suspend = neponset_suspend, 2151da177e4SLinus Torvalds .resume = neponset_resume, 2163ae5eaecSRussell King .driver = { 2173ae5eaecSRussell King .name = "neponset", 2183ae5eaecSRussell King }, 2191da177e4SLinus Torvalds }; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static struct resource neponset_resources[] = { 2221da177e4SLinus Torvalds [0] = { 2231da177e4SLinus Torvalds .start = 0x10000000, 2241da177e4SLinus Torvalds .end = 0x17ffffff, 2251da177e4SLinus Torvalds .flags = IORESOURCE_MEM, 2261da177e4SLinus Torvalds }, 2271da177e4SLinus Torvalds }; 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds static struct platform_device neponset_device = { 2301da177e4SLinus Torvalds .name = "neponset", 2311da177e4SLinus Torvalds .id = 0, 2321da177e4SLinus Torvalds .num_resources = ARRAY_SIZE(neponset_resources), 2331da177e4SLinus Torvalds .resource = neponset_resources, 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds static struct resource sa1111_resources[] = { 2371da177e4SLinus Torvalds [0] = { 2381da177e4SLinus Torvalds .start = 0x40000000, 2391da177e4SLinus Torvalds .end = 0x40001fff, 2401da177e4SLinus Torvalds .flags = IORESOURCE_MEM, 2411da177e4SLinus Torvalds }, 2421da177e4SLinus Torvalds [1] = { 2431da177e4SLinus Torvalds .start = IRQ_NEPONSET_SA1111, 2441da177e4SLinus Torvalds .end = IRQ_NEPONSET_SA1111, 2451da177e4SLinus Torvalds .flags = IORESOURCE_IRQ, 2461da177e4SLinus Torvalds }, 2471da177e4SLinus Torvalds }; 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds static u64 sa1111_dmamask = 0xffffffffUL; 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds static struct platform_device sa1111_device = { 2521da177e4SLinus Torvalds .name = "sa1111", 2531da177e4SLinus Torvalds .id = 0, 2541da177e4SLinus Torvalds .dev = { 2551da177e4SLinus Torvalds .dma_mask = &sa1111_dmamask, 2561da177e4SLinus Torvalds .coherent_dma_mask = 0xffffffff, 2571da177e4SLinus Torvalds }, 2581da177e4SLinus Torvalds .num_resources = ARRAY_SIZE(sa1111_resources), 2591da177e4SLinus Torvalds .resource = sa1111_resources, 2601da177e4SLinus Torvalds }; 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds static struct resource smc91x_resources[] = { 2631da177e4SLinus Torvalds [0] = { 2641da177e4SLinus Torvalds .name = "smc91x-regs", 2651da177e4SLinus Torvalds .start = SA1100_CS3_PHYS, 2661da177e4SLinus Torvalds .end = SA1100_CS3_PHYS + 0x01ffffff, 2671da177e4SLinus Torvalds .flags = IORESOURCE_MEM, 2681da177e4SLinus Torvalds }, 2691da177e4SLinus Torvalds [1] = { 2701da177e4SLinus Torvalds .start = IRQ_NEPONSET_SMC9196, 2711da177e4SLinus Torvalds .end = IRQ_NEPONSET_SMC9196, 2721da177e4SLinus Torvalds .flags = IORESOURCE_IRQ, 2731da177e4SLinus Torvalds }, 2741da177e4SLinus Torvalds [2] = { 2751da177e4SLinus Torvalds .name = "smc91x-attrib", 2761da177e4SLinus Torvalds .start = SA1100_CS3_PHYS + 0x02000000, 2771da177e4SLinus Torvalds .end = SA1100_CS3_PHYS + 0x03ffffff, 2781da177e4SLinus Torvalds .flags = IORESOURCE_MEM, 2791da177e4SLinus Torvalds }, 2801da177e4SLinus Torvalds }; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds static struct platform_device smc91x_device = { 2831da177e4SLinus Torvalds .name = "smc91x", 2841da177e4SLinus Torvalds .id = 0, 2851da177e4SLinus Torvalds .num_resources = ARRAY_SIZE(smc91x_resources), 2861da177e4SLinus Torvalds .resource = smc91x_resources, 2871da177e4SLinus Torvalds }; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds static struct platform_device *devices[] __initdata = { 2901da177e4SLinus Torvalds &neponset_device, 2911da177e4SLinus Torvalds &sa1111_device, 2921da177e4SLinus Torvalds &smc91x_device, 2931da177e4SLinus Torvalds }; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds static int __init neponset_init(void) 2961da177e4SLinus Torvalds { 2973ae5eaecSRussell King platform_driver_register(&neponset_device_driver); 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds /* 3001da177e4SLinus Torvalds * The Neponset is only present on the Assabet machine type. 3011da177e4SLinus Torvalds */ 3021da177e4SLinus Torvalds if (!machine_is_assabet()) 3031da177e4SLinus Torvalds return -ENODEV; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds /* 3061da177e4SLinus Torvalds * Ensure that the memory bus request/grant signals are setup, 3071da177e4SLinus Torvalds * and the grant is held in its inactive state, whether or not 3081da177e4SLinus Torvalds * we actually have a Neponset attached. 3091da177e4SLinus Torvalds */ 3101da177e4SLinus Torvalds sa1110_mb_disable(); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds if (!machine_has_neponset()) { 3131da177e4SLinus Torvalds printk(KERN_DEBUG "Neponset expansion board not present\n"); 3141da177e4SLinus Torvalds return -ENODEV; 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds if (WHOAMI != 0x11) { 3181da177e4SLinus Torvalds printk(KERN_WARNING "Neponset board detected, but " 3191da177e4SLinus Torvalds "wrong ID: %02x\n", WHOAMI); 3201da177e4SLinus Torvalds return -ENODEV; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds return platform_add_devices(devices, ARRAY_SIZE(devices)); 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds subsys_initcall(neponset_init); 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds static struct map_desc neponset_io_desc[] __initdata = { 32992519d82SDeepak Saxena { /* System Registers */ 33092519d82SDeepak Saxena .virtual = 0xf3000000, 33192519d82SDeepak Saxena .pfn = __phys_to_pfn(0x10000000), 33292519d82SDeepak Saxena .length = SZ_1M, 33392519d82SDeepak Saxena .type = MT_DEVICE 33492519d82SDeepak Saxena }, { /* SA-1111 */ 33592519d82SDeepak Saxena .virtual = 0xf4000000, 33692519d82SDeepak Saxena .pfn = __phys_to_pfn(0x40000000), 33792519d82SDeepak Saxena .length = SZ_1M, 33892519d82SDeepak Saxena .type = MT_DEVICE 33992519d82SDeepak Saxena } 3401da177e4SLinus Torvalds }; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds void __init neponset_map_io(void) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc)); 3451da177e4SLinus Torvalds } 346