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/tty.h> 81da177e4SLinus Torvalds #include <linux/ioport.h> 91da177e4SLinus Torvalds #include <linux/serial_core.h> 10d052d1beSRussell King #include <linux/platform_device.h> 111da177e4SLinus Torvalds #include <linux/slab.h> 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <asm/hardware.h> 141da177e4SLinus Torvalds #include <asm/mach-types.h> 151da177e4SLinus Torvalds #include <asm/irq.h> 161da177e4SLinus Torvalds #include <asm/mach/map.h> 171da177e4SLinus Torvalds #include <asm/mach/irq.h> 181da177e4SLinus Torvalds #include <asm/mach/serial_sa1100.h> 191da177e4SLinus Torvalds #include <asm/arch/assabet.h> 201da177e4SLinus Torvalds #include <asm/arch/neponset.h> 211da177e4SLinus Torvalds #include <asm/hardware/sa1111.h> 221da177e4SLinus Torvalds #include <asm/sizes.h> 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds /* 251da177e4SLinus Torvalds * Install handler for Neponset IRQ. Note that we have to loop here 261da177e4SLinus Torvalds * since the ETHERNET and USAR IRQs are level based, and we need to 271da177e4SLinus Torvalds * ensure that the IRQ signal is deasserted before returning. This 281da177e4SLinus Torvalds * is rather unfortunate. 291da177e4SLinus Torvalds */ 301da177e4SLinus Torvalds static void 3110dd5ce2SRussell King neponset_irq_handler(unsigned int irq, struct irq_desc *desc) 321da177e4SLinus Torvalds { 331da177e4SLinus Torvalds unsigned int irr; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds while (1) { 3610dd5ce2SRussell King struct irq_desc *d; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds /* 391da177e4SLinus Torvalds * Acknowledge the parent IRQ. 401da177e4SLinus Torvalds */ 411da177e4SLinus Torvalds desc->chip->ack(irq); 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds /* 441da177e4SLinus Torvalds * Read the interrupt reason register. Let's have all 451da177e4SLinus Torvalds * active IRQ bits high. Note: there is a typo in the 461da177e4SLinus Torvalds * Neponset user's guide for the SA1111 IRR level. 471da177e4SLinus Torvalds */ 481da177e4SLinus Torvalds irr = IRR ^ (IRR_ETHERNET | IRR_USAR); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) 511da177e4SLinus Torvalds break; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds /* 541da177e4SLinus Torvalds * Since there is no individual mask, we have to 551da177e4SLinus Torvalds * mask the parent IRQ. This is safe, since we'll 561da177e4SLinus Torvalds * recheck the register for any pending IRQs. 571da177e4SLinus Torvalds */ 581da177e4SLinus Torvalds if (irr & (IRR_ETHERNET | IRR_USAR)) { 591da177e4SLinus Torvalds desc->chip->mask(irq); 601da177e4SLinus Torvalds 61d782f33dSRussell King /* 62d782f33dSRussell King * Ack the interrupt now to prevent re-entering 63d782f33dSRussell King * this neponset handler. Again, this is safe 64d782f33dSRussell King * since we'll check the IRR register prior to 65d782f33dSRussell King * leaving. 66d782f33dSRussell King */ 67d782f33dSRussell King desc->chip->ack(irq); 68d782f33dSRussell King 691da177e4SLinus Torvalds if (irr & IRR_ETHERNET) { 701da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_SMC9196; 710cd61b68SLinus Torvalds desc_handle_irq(IRQ_NEPONSET_SMC9196, d); 721da177e4SLinus Torvalds } 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds if (irr & IRR_USAR) { 751da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_USAR; 760cd61b68SLinus Torvalds desc_handle_irq(IRQ_NEPONSET_USAR, d); 771da177e4SLinus Torvalds } 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds desc->chip->unmask(irq); 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds if (irr & IRR_SA1111) { 831da177e4SLinus Torvalds d = irq_desc + IRQ_NEPONSET_SA1111; 840cd61b68SLinus Torvalds desc_handle_irq(IRQ_NEPONSET_SA1111, d); 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds u_int mdm_ctl0 = MDM_CTL_0; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 941da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 951da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS2; 961da177e4SLinus Torvalds else 971da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS2; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 1001da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR2; 1011da177e4SLinus Torvalds else 1021da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR2; 1031da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 1041da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 1051da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS1; 1061da177e4SLinus Torvalds else 1071da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS1; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 1101da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR1; 1111da177e4SLinus Torvalds else 1121da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR1; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds MDM_CTL_0 = mdm_ctl0; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static u_int neponset_get_mctrl(struct uart_port *port) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 1211da177e4SLinus Torvalds u_int mdm_ctl1 = MDM_CTL_1; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 1241da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD2) 1251da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1261da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS2) 1271da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1281da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR2) 1291da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1301da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 1311da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD1) 1321da177e4SLinus Torvalds ret &= ~TIOCM_CD; 1331da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS1) 1341da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 1351da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR1) 1361da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds return ret; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 142cdea4606SRussell King static struct sa1100_port_fns neponset_port_fns __devinitdata = { 1431da177e4SLinus Torvalds .set_mctrl = neponset_set_mctrl, 1441da177e4SLinus Torvalds .get_mctrl = neponset_get_mctrl, 1451da177e4SLinus Torvalds }; 1461da177e4SLinus Torvalds 147cdea4606SRussell King static int __devinit neponset_probe(struct platform_device *dev) 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds sa1100_register_uart_fns(&neponset_port_fns); 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds /* 1521da177e4SLinus Torvalds * Install handler for GPIO25. 1531da177e4SLinus Torvalds */ 1546cab4860SDmitry Baryshkov set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING); 1551da177e4SLinus Torvalds set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler); 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds /* 1581da177e4SLinus Torvalds * We would set IRQ_GPIO25 to be a wake-up IRQ, but 1591da177e4SLinus Torvalds * unfortunately something on the Neponset activates 1601da177e4SLinus Torvalds * this IRQ on sleep (ethernet?) 1611da177e4SLinus Torvalds */ 1621da177e4SLinus Torvalds #if 0 1631da177e4SLinus Torvalds enable_irq_wake(IRQ_GPIO25); 1641da177e4SLinus Torvalds #endif 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /* 1671da177e4SLinus Torvalds * Setup other Neponset IRQs. SA1111 will be done by the 1681da177e4SLinus Torvalds * generic SA1111 code. 1691da177e4SLinus Torvalds */ 17010dd5ce2SRussell King set_irq_handler(IRQ_NEPONSET_SMC9196, handle_simple_irq); 1711da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE); 17210dd5ce2SRussell King set_irq_handler(IRQ_NEPONSET_USAR, handle_simple_irq); 1731da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE); 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* 1761da177e4SLinus Torvalds * Disable GPIO 0/1 drivers so the buttons work on the module. 1771da177e4SLinus Torvalds */ 1781da177e4SLinus Torvalds NCR_0 = NCR_GP01_OFF; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds return 0; 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds #ifdef CONFIG_PM 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* 1861da177e4SLinus Torvalds * LDM power management. 1871da177e4SLinus Torvalds */ 18893160c63SRafael J. Wysocki static unsigned int neponset_saved_state; 18993160c63SRafael J. Wysocki 1903ae5eaecSRussell King static int neponset_suspend(struct platform_device *dev, pm_message_t state) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds /* 1931da177e4SLinus Torvalds * Save state. 1941da177e4SLinus Torvalds */ 19593160c63SRafael J. Wysocki neponset_saved_state = NCR_0; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds return 0; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds 2003ae5eaecSRussell King static int neponset_resume(struct platform_device *dev) 2011da177e4SLinus Torvalds { 20293160c63SRafael J. Wysocki NCR_0 = neponset_saved_state; 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 295cdcb81f7SRussell King extern void sa1110_mb_disable(void); 296cdcb81f7SRussell King 2971da177e4SLinus Torvalds static int __init neponset_init(void) 2981da177e4SLinus Torvalds { 2993ae5eaecSRussell King platform_driver_register(&neponset_device_driver); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds /* 3021da177e4SLinus Torvalds * The Neponset is only present on the Assabet machine type. 3031da177e4SLinus Torvalds */ 3041da177e4SLinus Torvalds if (!machine_is_assabet()) 3051da177e4SLinus Torvalds return -ENODEV; 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds /* 3081da177e4SLinus Torvalds * Ensure that the memory bus request/grant signals are setup, 3091da177e4SLinus Torvalds * and the grant is held in its inactive state, whether or not 3101da177e4SLinus Torvalds * we actually have a Neponset attached. 3111da177e4SLinus Torvalds */ 3121da177e4SLinus Torvalds sa1110_mb_disable(); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds if (!machine_has_neponset()) { 3151da177e4SLinus Torvalds printk(KERN_DEBUG "Neponset expansion board not present\n"); 3161da177e4SLinus Torvalds return -ENODEV; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds if (WHOAMI != 0x11) { 3201da177e4SLinus Torvalds printk(KERN_WARNING "Neponset board detected, but " 3211da177e4SLinus Torvalds "wrong ID: %02x\n", WHOAMI); 3221da177e4SLinus Torvalds return -ENODEV; 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds return platform_add_devices(devices, ARRAY_SIZE(devices)); 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds subsys_initcall(neponset_init); 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds static struct map_desc neponset_io_desc[] __initdata = { 33192519d82SDeepak Saxena { /* System Registers */ 33292519d82SDeepak Saxena .virtual = 0xf3000000, 33392519d82SDeepak Saxena .pfn = __phys_to_pfn(0x10000000), 33492519d82SDeepak Saxena .length = SZ_1M, 33592519d82SDeepak Saxena .type = MT_DEVICE 33692519d82SDeepak Saxena }, { /* SA-1111 */ 33792519d82SDeepak Saxena .virtual = 0xf4000000, 33892519d82SDeepak Saxena .pfn = __phys_to_pfn(0x40000000), 33992519d82SDeepak Saxena .length = SZ_1M, 34092519d82SDeepak Saxena .type = MT_DEVICE 34192519d82SDeepak Saxena } 3421da177e4SLinus Torvalds }; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds void __init neponset_map_io(void) 3451da177e4SLinus Torvalds { 3461da177e4SLinus Torvalds iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc)); 3471da177e4SLinus Torvalds } 348