11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/arm/mach-sa1100/neponset.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds */ 51da177e4SLinus Torvalds #include <linux/init.h> 61da177e4SLinus Torvalds #include <linux/ioport.h> 792e617d9SRussell King #include <linux/kernel.h> 8d052d1beSRussell King #include <linux/platform_device.h> 992e617d9SRussell King #include <linux/serial_core.h> 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #include <asm/mach-types.h> 121da177e4SLinus Torvalds #include <asm/irq.h> 131da177e4SLinus Torvalds #include <asm/mach/map.h> 141da177e4SLinus Torvalds #include <asm/mach/irq.h> 151da177e4SLinus Torvalds #include <asm/mach/serial_sa1100.h> 161da177e4SLinus Torvalds #include <asm/hardware/sa1111.h> 171da177e4SLinus Torvalds #include <asm/sizes.h> 181da177e4SLinus Torvalds 1992e617d9SRussell King #include <mach/hardware.h> 2092e617d9SRussell King #include <mach/assabet.h> 2192e617d9SRussell King #include <mach/neponset.h> 2292e617d9SRussell King 236ad1b614SRussell King void neponset_ncr_frob(unsigned int mask, unsigned int val) 246ad1b614SRussell King { 256ad1b614SRussell King unsigned long flags; 266ad1b614SRussell King 276ad1b614SRussell King local_irq_save(flags); 286ad1b614SRussell King NCR_0 = (NCR_0 & ~mask) | val; 296ad1b614SRussell King local_irq_restore(flags); 306ad1b614SRussell King } 316ad1b614SRussell King 321da177e4SLinus Torvalds static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) 331da177e4SLinus Torvalds { 341da177e4SLinus Torvalds u_int mdm_ctl0 = MDM_CTL_0; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 371da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 381da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS2; 391da177e4SLinus Torvalds else 401da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS2; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 431da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR2; 441da177e4SLinus Torvalds else 451da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR2; 461da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 471da177e4SLinus Torvalds if (mctrl & TIOCM_RTS) 481da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_RTS1; 491da177e4SLinus Torvalds else 501da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_RTS1; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds if (mctrl & TIOCM_DTR) 531da177e4SLinus Torvalds mdm_ctl0 &= ~MDM_CTL0_DTR1; 541da177e4SLinus Torvalds else 551da177e4SLinus Torvalds mdm_ctl0 |= MDM_CTL0_DTR1; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds MDM_CTL_0 = mdm_ctl0; 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds static u_int neponset_get_mctrl(struct uart_port *port) 621da177e4SLinus Torvalds { 631da177e4SLinus Torvalds u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 641da177e4SLinus Torvalds u_int mdm_ctl1 = MDM_CTL_1; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds if (port->mapbase == _Ser1UTCR0) { 671da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD2) 681da177e4SLinus Torvalds ret &= ~TIOCM_CD; 691da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS2) 701da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 711da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR2) 721da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 731da177e4SLinus Torvalds } else if (port->mapbase == _Ser3UTCR0) { 741da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DCD1) 751da177e4SLinus Torvalds ret &= ~TIOCM_CD; 761da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_CTS1) 771da177e4SLinus Torvalds ret &= ~TIOCM_CTS; 781da177e4SLinus Torvalds if (mdm_ctl1 & MDM_CTL1_DSR1) 791da177e4SLinus Torvalds ret &= ~TIOCM_DSR; 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds return ret; 831da177e4SLinus Torvalds } 841da177e4SLinus Torvalds 85cdea4606SRussell King static struct sa1100_port_fns neponset_port_fns __devinitdata = { 861da177e4SLinus Torvalds .set_mctrl = neponset_set_mctrl, 871da177e4SLinus Torvalds .get_mctrl = neponset_get_mctrl, 881da177e4SLinus Torvalds }; 891da177e4SLinus Torvalds 9071045520SRussell King /* 9192e617d9SRussell King * Install handler for Neponset IRQ. Note that we have to loop here 9292e617d9SRussell King * since the ETHERNET and USAR IRQs are level based, and we need to 9392e617d9SRussell King * ensure that the IRQ signal is deasserted before returning. This 9492e617d9SRussell King * is rather unfortunate. 9592e617d9SRussell King */ 9692e617d9SRussell King static void 9792e617d9SRussell King neponset_irq_handler(unsigned int irq, struct irq_desc *desc) 9892e617d9SRussell King { 9992e617d9SRussell King unsigned int irr; 10092e617d9SRussell King 10192e617d9SRussell King while (1) { 10292e617d9SRussell King /* 10392e617d9SRussell King * Acknowledge the parent IRQ. 10492e617d9SRussell King */ 10592e617d9SRussell King desc->irq_data.chip->irq_ack(&desc->irq_data); 10692e617d9SRussell King 10792e617d9SRussell King /* 10892e617d9SRussell King * Read the interrupt reason register. Let's have all 10992e617d9SRussell King * active IRQ bits high. Note: there is a typo in the 11092e617d9SRussell King * Neponset user's guide for the SA1111 IRR level. 11192e617d9SRussell King */ 11292e617d9SRussell King irr = IRR ^ (IRR_ETHERNET | IRR_USAR); 11392e617d9SRussell King 11492e617d9SRussell King if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) 11592e617d9SRussell King break; 11692e617d9SRussell King 11792e617d9SRussell King /* 11892e617d9SRussell King * Since there is no individual mask, we have to 11992e617d9SRussell King * mask the parent IRQ. This is safe, since we'll 12092e617d9SRussell King * recheck the register for any pending IRQs. 12192e617d9SRussell King */ 12292e617d9SRussell King if (irr & (IRR_ETHERNET | IRR_USAR)) { 12392e617d9SRussell King desc->irq_data.chip->irq_mask(&desc->irq_data); 12492e617d9SRussell King 12592e617d9SRussell King /* 12692e617d9SRussell King * Ack the interrupt now to prevent re-entering 12792e617d9SRussell King * this neponset handler. Again, this is safe 12892e617d9SRussell King * since we'll check the IRR register prior to 12992e617d9SRussell King * leaving. 13092e617d9SRussell King */ 13192e617d9SRussell King desc->irq_data.chip->irq_ack(&desc->irq_data); 13292e617d9SRussell King 13392e617d9SRussell King if (irr & IRR_ETHERNET) { 13492e617d9SRussell King generic_handle_irq(IRQ_NEPONSET_SMC9196); 13592e617d9SRussell King } 13692e617d9SRussell King 13792e617d9SRussell King if (irr & IRR_USAR) { 13892e617d9SRussell King generic_handle_irq(IRQ_NEPONSET_USAR); 13992e617d9SRussell King } 14092e617d9SRussell King 14192e617d9SRussell King desc->irq_data.chip->irq_unmask(&desc->irq_data); 14292e617d9SRussell King } 14392e617d9SRussell King 14492e617d9SRussell King if (irr & IRR_SA1111) { 14592e617d9SRussell King generic_handle_irq(IRQ_NEPONSET_SA1111); 14692e617d9SRussell King } 14792e617d9SRussell King } 14892e617d9SRussell King } 14992e617d9SRussell King 15092e617d9SRussell King /* 15171045520SRussell King * Yes, we really do not have any kind of masking or unmasking 15271045520SRussell King */ 15371045520SRussell King static void nochip_noop(struct irq_data *irq) 15471045520SRussell King { 15571045520SRussell King } 15671045520SRussell King 15771045520SRussell King static struct irq_chip nochip = { 15871045520SRussell King .name = "neponset", 15971045520SRussell King .irq_ack = nochip_noop, 16071045520SRussell King .irq_mask = nochip_noop, 16171045520SRussell King .irq_unmask = nochip_noop, 16271045520SRussell King }; 16371045520SRussell King 16492e617d9SRussell King static struct resource sa1111_resources[] = { 16592e617d9SRussell King [0] = DEFINE_RES_MEM(0x40000000, SZ_8K), 16692e617d9SRussell King [1] = DEFINE_RES_IRQ(IRQ_NEPONSET_SA1111), 16792e617d9SRussell King }; 16892e617d9SRussell King 16992e617d9SRussell King static struct sa1111_platform_data sa1111_info = { 17092e617d9SRussell King .irq_base = IRQ_BOARD_END, 17192e617d9SRussell King }; 17292e617d9SRussell King 17392e617d9SRussell King static u64 sa1111_dmamask = 0xffffffffUL; 17492e617d9SRussell King 17592e617d9SRussell King static struct platform_device sa1111_device = { 17692e617d9SRussell King .name = "sa1111", 17792e617d9SRussell King .id = 0, 17892e617d9SRussell King .dev = { 17992e617d9SRussell King .dma_mask = &sa1111_dmamask, 18092e617d9SRussell King .coherent_dma_mask = 0xffffffff, 18192e617d9SRussell King .platform_data = &sa1111_info, 18292e617d9SRussell King }, 18392e617d9SRussell King .num_resources = ARRAY_SIZE(sa1111_resources), 18492e617d9SRussell King .resource = sa1111_resources, 18592e617d9SRussell King }; 18692e617d9SRussell King 18792e617d9SRussell King static struct resource smc91x_resources[] = { 18892e617d9SRussell King [0] = DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS, 0x02000000, "smc91x-regs"), 18992e617d9SRussell King [1] = DEFINE_RES_IRQ(IRQ_NEPONSET_SMC9196), 19092e617d9SRussell King [2] = DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000, 19192e617d9SRussell King 0x02000000, "smc91x-attrib"), 19292e617d9SRussell King }; 19392e617d9SRussell King 19492e617d9SRussell King static struct platform_device smc91x_device = { 19592e617d9SRussell King .name = "smc91x", 19692e617d9SRussell King .id = 0, 19792e617d9SRussell King .num_resources = ARRAY_SIZE(smc91x_resources), 19892e617d9SRussell King .resource = smc91x_resources, 19992e617d9SRussell King }; 20092e617d9SRussell King 201cdea4606SRussell King static int __devinit neponset_probe(struct platform_device *dev) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds sa1100_register_uart_fns(&neponset_port_fns); 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds /* 2061da177e4SLinus Torvalds * Install handler for GPIO25. 2071da177e4SLinus Torvalds */ 2086845664aSThomas Gleixner irq_set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING); 2096845664aSThomas Gleixner irq_set_chained_handler(IRQ_GPIO25, neponset_irq_handler); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /* 2121da177e4SLinus Torvalds * We would set IRQ_GPIO25 to be a wake-up IRQ, but 2131da177e4SLinus Torvalds * unfortunately something on the Neponset activates 2141da177e4SLinus Torvalds * this IRQ on sleep (ethernet?) 2151da177e4SLinus Torvalds */ 2161da177e4SLinus Torvalds #if 0 2171da177e4SLinus Torvalds enable_irq_wake(IRQ_GPIO25); 2181da177e4SLinus Torvalds #endif 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds /* 2211da177e4SLinus Torvalds * Setup other Neponset IRQs. SA1111 will be done by the 2221da177e4SLinus Torvalds * generic SA1111 code. 2231da177e4SLinus Torvalds */ 22471045520SRussell King irq_set_chip_and_handler(IRQ_NEPONSET_SMC9196, &nochip, 22571045520SRussell King handle_simple_irq); 2261da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE); 22771045520SRussell King irq_set_chip_and_handler(IRQ_NEPONSET_USAR, &nochip, 22871045520SRussell King handle_simple_irq); 2291da177e4SLinus Torvalds set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE); 23071045520SRussell King irq_set_chip(IRQ_NEPONSET_SA1111, &nochip); 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds /* 2331da177e4SLinus Torvalds * Disable GPIO 0/1 drivers so the buttons work on the module. 2341da177e4SLinus Torvalds */ 2351da177e4SLinus Torvalds NCR_0 = NCR_GP01_OFF; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds return 0; 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds #ifdef CONFIG_PM 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds * LDM power management. 2441da177e4SLinus Torvalds */ 24593160c63SRafael J. Wysocki static unsigned int neponset_saved_state; 24693160c63SRafael J. Wysocki 2473ae5eaecSRussell King static int neponset_suspend(struct platform_device *dev, pm_message_t state) 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds /* 2501da177e4SLinus Torvalds * Save state. 2511da177e4SLinus Torvalds */ 25293160c63SRafael J. Wysocki neponset_saved_state = NCR_0; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds return 0; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2573ae5eaecSRussell King static int neponset_resume(struct platform_device *dev) 2581da177e4SLinus Torvalds { 25993160c63SRafael J. Wysocki NCR_0 = neponset_saved_state; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds return 0; 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds #else 2651da177e4SLinus Torvalds #define neponset_suspend NULL 2661da177e4SLinus Torvalds #define neponset_resume NULL 2671da177e4SLinus Torvalds #endif 2681da177e4SLinus Torvalds 2693ae5eaecSRussell King static struct platform_driver neponset_device_driver = { 2701da177e4SLinus Torvalds .probe = neponset_probe, 2711da177e4SLinus Torvalds .suspend = neponset_suspend, 2721da177e4SLinus Torvalds .resume = neponset_resume, 2733ae5eaecSRussell King .driver = { 2743ae5eaecSRussell King .name = "neponset", 2753ae5eaecSRussell King }, 2761da177e4SLinus Torvalds }; 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds static struct resource neponset_resources[] = { 279a181099eSRussell King [0] = DEFINE_RES_MEM(0x10000000, 0x08000000), 2801da177e4SLinus Torvalds }; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds static struct platform_device neponset_device = { 2831da177e4SLinus Torvalds .name = "neponset", 2841da177e4SLinus Torvalds .id = 0, 2851da177e4SLinus Torvalds .num_resources = ARRAY_SIZE(neponset_resources), 2861da177e4SLinus Torvalds .resource = neponset_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