Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-sa1100/neponset.c |
| 3 | * |
| 4 | */ |
| 5 | #include <linux/kernel.h> |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/ptrace.h> |
| 8 | #include <linux/tty.h> |
| 9 | #include <linux/ioport.h> |
| 10 | #include <linux/serial_core.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 11 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/slab.h> |
| 13 | |
| 14 | #include <asm/hardware.h> |
| 15 | #include <asm/mach-types.h> |
| 16 | #include <asm/irq.h> |
| 17 | #include <asm/mach/map.h> |
| 18 | #include <asm/mach/irq.h> |
| 19 | #include <asm/mach/serial_sa1100.h> |
| 20 | #include <asm/arch/assabet.h> |
| 21 | #include <asm/arch/neponset.h> |
| 22 | #include <asm/hardware/sa1111.h> |
| 23 | #include <asm/sizes.h> |
| 24 | |
| 25 | /* |
| 26 | * Install handler for Neponset IRQ. Note that we have to loop here |
| 27 | * since the ETHERNET and USAR IRQs are level based, and we need to |
| 28 | * ensure that the IRQ signal is deasserted before returning. This |
| 29 | * is rather unfortunate. |
| 30 | */ |
| 31 | static void |
| 32 | neponset_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) |
| 33 | { |
| 34 | unsigned int irr; |
| 35 | |
| 36 | while (1) { |
| 37 | struct irqdesc *d; |
| 38 | |
| 39 | /* |
| 40 | * Acknowledge the parent IRQ. |
| 41 | */ |
| 42 | desc->chip->ack(irq); |
| 43 | |
| 44 | /* |
| 45 | * Read the interrupt reason register. Let's have all |
| 46 | * active IRQ bits high. Note: there is a typo in the |
| 47 | * Neponset user's guide for the SA1111 IRR level. |
| 48 | */ |
| 49 | irr = IRR ^ (IRR_ETHERNET | IRR_USAR); |
| 50 | |
| 51 | if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) |
| 52 | break; |
| 53 | |
| 54 | /* |
| 55 | * Since there is no individual mask, we have to |
| 56 | * mask the parent IRQ. This is safe, since we'll |
| 57 | * recheck the register for any pending IRQs. |
| 58 | */ |
| 59 | if (irr & (IRR_ETHERNET | IRR_USAR)) { |
| 60 | desc->chip->mask(irq); |
| 61 | |
Russell King | d782f33 | 2006-06-08 17:59:31 +0100 | [diff] [blame] | 62 | /* |
| 63 | * Ack the interrupt now to prevent re-entering |
| 64 | * this neponset handler. Again, this is safe |
| 65 | * since we'll check the IRR register prior to |
| 66 | * leaving. |
| 67 | */ |
| 68 | desc->chip->ack(irq); |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | if (irr & IRR_ETHERNET) { |
| 71 | d = irq_desc + IRQ_NEPONSET_SMC9196; |
Russell King | 664399e | 2005-09-04 19:45:00 +0100 | [diff] [blame] | 72 | desc_handle_irq(IRQ_NEPONSET_SMC9196, d, regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | if (irr & IRR_USAR) { |
| 76 | d = irq_desc + IRQ_NEPONSET_USAR; |
Russell King | 664399e | 2005-09-04 19:45:00 +0100 | [diff] [blame] | 77 | desc_handle_irq(IRQ_NEPONSET_USAR, d, regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | desc->chip->unmask(irq); |
| 81 | } |
| 82 | |
| 83 | if (irr & IRR_SA1111) { |
| 84 | d = irq_desc + IRQ_NEPONSET_SA1111; |
Russell King | 664399e | 2005-09-04 19:45:00 +0100 | [diff] [blame] | 85 | desc_handle_irq(IRQ_NEPONSET_SA1111, d, regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) |
| 91 | { |
| 92 | u_int mdm_ctl0 = MDM_CTL_0; |
| 93 | |
| 94 | if (port->mapbase == _Ser1UTCR0) { |
| 95 | if (mctrl & TIOCM_RTS) |
| 96 | mdm_ctl0 &= ~MDM_CTL0_RTS2; |
| 97 | else |
| 98 | mdm_ctl0 |= MDM_CTL0_RTS2; |
| 99 | |
| 100 | if (mctrl & TIOCM_DTR) |
| 101 | mdm_ctl0 &= ~MDM_CTL0_DTR2; |
| 102 | else |
| 103 | mdm_ctl0 |= MDM_CTL0_DTR2; |
| 104 | } else if (port->mapbase == _Ser3UTCR0) { |
| 105 | if (mctrl & TIOCM_RTS) |
| 106 | mdm_ctl0 &= ~MDM_CTL0_RTS1; |
| 107 | else |
| 108 | mdm_ctl0 |= MDM_CTL0_RTS1; |
| 109 | |
| 110 | if (mctrl & TIOCM_DTR) |
| 111 | mdm_ctl0 &= ~MDM_CTL0_DTR1; |
| 112 | else |
| 113 | mdm_ctl0 |= MDM_CTL0_DTR1; |
| 114 | } |
| 115 | |
| 116 | MDM_CTL_0 = mdm_ctl0; |
| 117 | } |
| 118 | |
| 119 | static u_int neponset_get_mctrl(struct uart_port *port) |
| 120 | { |
| 121 | u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; |
| 122 | u_int mdm_ctl1 = MDM_CTL_1; |
| 123 | |
| 124 | if (port->mapbase == _Ser1UTCR0) { |
| 125 | if (mdm_ctl1 & MDM_CTL1_DCD2) |
| 126 | ret &= ~TIOCM_CD; |
| 127 | if (mdm_ctl1 & MDM_CTL1_CTS2) |
| 128 | ret &= ~TIOCM_CTS; |
| 129 | if (mdm_ctl1 & MDM_CTL1_DSR2) |
| 130 | ret &= ~TIOCM_DSR; |
| 131 | } else if (port->mapbase == _Ser3UTCR0) { |
| 132 | if (mdm_ctl1 & MDM_CTL1_DCD1) |
| 133 | ret &= ~TIOCM_CD; |
| 134 | if (mdm_ctl1 & MDM_CTL1_CTS1) |
| 135 | ret &= ~TIOCM_CTS; |
| 136 | if (mdm_ctl1 & MDM_CTL1_DSR1) |
| 137 | ret &= ~TIOCM_DSR; |
| 138 | } |
| 139 | |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | static struct sa1100_port_fns neponset_port_fns __initdata = { |
| 144 | .set_mctrl = neponset_set_mctrl, |
| 145 | .get_mctrl = neponset_get_mctrl, |
| 146 | }; |
| 147 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 148 | static int neponset_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | sa1100_register_uart_fns(&neponset_port_fns); |
| 151 | |
| 152 | /* |
| 153 | * Install handler for GPIO25. |
| 154 | */ |
| 155 | set_irq_type(IRQ_GPIO25, IRQT_RISING); |
| 156 | set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler); |
| 157 | |
| 158 | /* |
| 159 | * We would set IRQ_GPIO25 to be a wake-up IRQ, but |
| 160 | * unfortunately something on the Neponset activates |
| 161 | * this IRQ on sleep (ethernet?) |
| 162 | */ |
| 163 | #if 0 |
| 164 | enable_irq_wake(IRQ_GPIO25); |
| 165 | #endif |
| 166 | |
| 167 | /* |
| 168 | * Setup other Neponset IRQs. SA1111 will be done by the |
| 169 | * generic SA1111 code. |
| 170 | */ |
| 171 | set_irq_handler(IRQ_NEPONSET_SMC9196, do_simple_IRQ); |
| 172 | set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE); |
| 173 | set_irq_handler(IRQ_NEPONSET_USAR, do_simple_IRQ); |
| 174 | set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE); |
| 175 | |
| 176 | /* |
| 177 | * Disable GPIO 0/1 drivers so the buttons work on the module. |
| 178 | */ |
| 179 | NCR_0 = NCR_GP01_OFF; |
| 180 | |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | #ifdef CONFIG_PM |
| 185 | |
| 186 | /* |
| 187 | * LDM power management. |
| 188 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 189 | static int neponset_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
| 191 | /* |
| 192 | * Save state. |
| 193 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 194 | if (!dev->dev.power.saved_state) |
| 195 | dev->dev.power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL); |
| 196 | if (!dev->dev.power.saved_state) |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 197 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 199 | *(unsigned int *)dev->dev.power.saved_state = NCR_0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 204 | static int neponset_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 206 | if (dev->dev.power.saved_state) { |
| 207 | NCR_0 = *(unsigned int *)dev->dev.power.saved_state; |
| 208 | kfree(dev->dev.power.saved_state); |
| 209 | dev->dev.power.saved_state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | #else |
| 216 | #define neponset_suspend NULL |
| 217 | #define neponset_resume NULL |
| 218 | #endif |
| 219 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 220 | static struct platform_driver neponset_device_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | .probe = neponset_probe, |
| 222 | .suspend = neponset_suspend, |
| 223 | .resume = neponset_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 224 | .driver = { |
| 225 | .name = "neponset", |
| 226 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | }; |
| 228 | |
| 229 | static struct resource neponset_resources[] = { |
| 230 | [0] = { |
| 231 | .start = 0x10000000, |
| 232 | .end = 0x17ffffff, |
| 233 | .flags = IORESOURCE_MEM, |
| 234 | }, |
| 235 | }; |
| 236 | |
| 237 | static struct platform_device neponset_device = { |
| 238 | .name = "neponset", |
| 239 | .id = 0, |
| 240 | .num_resources = ARRAY_SIZE(neponset_resources), |
| 241 | .resource = neponset_resources, |
| 242 | }; |
| 243 | |
| 244 | static struct resource sa1111_resources[] = { |
| 245 | [0] = { |
| 246 | .start = 0x40000000, |
| 247 | .end = 0x40001fff, |
| 248 | .flags = IORESOURCE_MEM, |
| 249 | }, |
| 250 | [1] = { |
| 251 | .start = IRQ_NEPONSET_SA1111, |
| 252 | .end = IRQ_NEPONSET_SA1111, |
| 253 | .flags = IORESOURCE_IRQ, |
| 254 | }, |
| 255 | }; |
| 256 | |
| 257 | static u64 sa1111_dmamask = 0xffffffffUL; |
| 258 | |
| 259 | static struct platform_device sa1111_device = { |
| 260 | .name = "sa1111", |
| 261 | .id = 0, |
| 262 | .dev = { |
| 263 | .dma_mask = &sa1111_dmamask, |
| 264 | .coherent_dma_mask = 0xffffffff, |
| 265 | }, |
| 266 | .num_resources = ARRAY_SIZE(sa1111_resources), |
| 267 | .resource = sa1111_resources, |
| 268 | }; |
| 269 | |
| 270 | static struct resource smc91x_resources[] = { |
| 271 | [0] = { |
| 272 | .name = "smc91x-regs", |
| 273 | .start = SA1100_CS3_PHYS, |
| 274 | .end = SA1100_CS3_PHYS + 0x01ffffff, |
| 275 | .flags = IORESOURCE_MEM, |
| 276 | }, |
| 277 | [1] = { |
| 278 | .start = IRQ_NEPONSET_SMC9196, |
| 279 | .end = IRQ_NEPONSET_SMC9196, |
| 280 | .flags = IORESOURCE_IRQ, |
| 281 | }, |
| 282 | [2] = { |
| 283 | .name = "smc91x-attrib", |
| 284 | .start = SA1100_CS3_PHYS + 0x02000000, |
| 285 | .end = SA1100_CS3_PHYS + 0x03ffffff, |
| 286 | .flags = IORESOURCE_MEM, |
| 287 | }, |
| 288 | }; |
| 289 | |
| 290 | static struct platform_device smc91x_device = { |
| 291 | .name = "smc91x", |
| 292 | .id = 0, |
| 293 | .num_resources = ARRAY_SIZE(smc91x_resources), |
| 294 | .resource = smc91x_resources, |
| 295 | }; |
| 296 | |
| 297 | static struct platform_device *devices[] __initdata = { |
| 298 | &neponset_device, |
| 299 | &sa1111_device, |
| 300 | &smc91x_device, |
| 301 | }; |
| 302 | |
| 303 | static int __init neponset_init(void) |
| 304 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 305 | platform_driver_register(&neponset_device_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
| 307 | /* |
| 308 | * The Neponset is only present on the Assabet machine type. |
| 309 | */ |
| 310 | if (!machine_is_assabet()) |
| 311 | return -ENODEV; |
| 312 | |
| 313 | /* |
| 314 | * Ensure that the memory bus request/grant signals are setup, |
| 315 | * and the grant is held in its inactive state, whether or not |
| 316 | * we actually have a Neponset attached. |
| 317 | */ |
| 318 | sa1110_mb_disable(); |
| 319 | |
| 320 | if (!machine_has_neponset()) { |
| 321 | printk(KERN_DEBUG "Neponset expansion board not present\n"); |
| 322 | return -ENODEV; |
| 323 | } |
| 324 | |
| 325 | if (WHOAMI != 0x11) { |
| 326 | printk(KERN_WARNING "Neponset board detected, but " |
| 327 | "wrong ID: %02x\n", WHOAMI); |
| 328 | return -ENODEV; |
| 329 | } |
| 330 | |
| 331 | return platform_add_devices(devices, ARRAY_SIZE(devices)); |
| 332 | } |
| 333 | |
| 334 | subsys_initcall(neponset_init); |
| 335 | |
| 336 | static struct map_desc neponset_io_desc[] __initdata = { |
Deepak Saxena | 92519d8 | 2005-10-28 15:19:04 +0100 | [diff] [blame] | 337 | { /* System Registers */ |
| 338 | .virtual = 0xf3000000, |
| 339 | .pfn = __phys_to_pfn(0x10000000), |
| 340 | .length = SZ_1M, |
| 341 | .type = MT_DEVICE |
| 342 | }, { /* SA-1111 */ |
| 343 | .virtual = 0xf4000000, |
| 344 | .pfn = __phys_to_pfn(0x40000000), |
| 345 | .length = SZ_1M, |
| 346 | .type = MT_DEVICE |
| 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | }; |
| 349 | |
| 350 | void __init neponset_map_io(void) |
| 351 | { |
| 352 | iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc)); |
| 353 | } |