2 * linux/arch/arm/mach-sa1100/neponset.c
5 #include <linux/kernel.h>
6 #include <linux/init.h>
8 #include <linux/ioport.h>
9 #include <linux/serial_core.h>
10 #include <linux/platform_device.h>
12 #include <mach/hardware.h>
13 #include <asm/mach-types.h>
15 #include <asm/mach/map.h>
16 #include <asm/mach/irq.h>
17 #include <asm/mach/serial_sa1100.h>
18 #include <mach/assabet.h>
19 #include <mach/neponset.h>
20 #include <asm/hardware/sa1111.h>
21 #include <asm/sizes.h>
24 * Install handler for Neponset IRQ. Note that we have to loop here
25 * since the ETHERNET and USAR IRQs are level based, and we need to
26 * ensure that the IRQ signal is deasserted before returning. This
27 * is rather unfortunate.
30 neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
36 * Acknowledge the parent IRQ.
38 desc->irq_data.chip->irq_ack(&desc->irq_data);
41 * Read the interrupt reason register. Let's have all
42 * active IRQ bits high. Note: there is a typo in the
43 * Neponset user's guide for the SA1111 IRR level.
45 irr = IRR ^ (IRR_ETHERNET | IRR_USAR);
47 if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
51 * Since there is no individual mask, we have to
52 * mask the parent IRQ. This is safe, since we'll
53 * recheck the register for any pending IRQs.
55 if (irr & (IRR_ETHERNET | IRR_USAR)) {
56 desc->irq_data.chip->irq_mask(&desc->irq_data);
59 * Ack the interrupt now to prevent re-entering
60 * this neponset handler. Again, this is safe
61 * since we'll check the IRR register prior to
64 desc->irq_data.chip->irq_ack(&desc->irq_data);
66 if (irr & IRR_ETHERNET) {
67 generic_handle_irq(IRQ_NEPONSET_SMC9196);
71 generic_handle_irq(IRQ_NEPONSET_USAR);
74 desc->irq_data.chip->irq_unmask(&desc->irq_data);
77 if (irr & IRR_SA1111) {
78 generic_handle_irq(IRQ_NEPONSET_SA1111);
83 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
85 u_int mdm_ctl0 = MDM_CTL_0;
87 if (port->mapbase == _Ser1UTCR0) {
88 if (mctrl & TIOCM_RTS)
89 mdm_ctl0 &= ~MDM_CTL0_RTS2;
91 mdm_ctl0 |= MDM_CTL0_RTS2;
93 if (mctrl & TIOCM_DTR)
94 mdm_ctl0 &= ~MDM_CTL0_DTR2;
96 mdm_ctl0 |= MDM_CTL0_DTR2;
97 } else if (port->mapbase == _Ser3UTCR0) {
98 if (mctrl & TIOCM_RTS)
99 mdm_ctl0 &= ~MDM_CTL0_RTS1;
101 mdm_ctl0 |= MDM_CTL0_RTS1;
103 if (mctrl & TIOCM_DTR)
104 mdm_ctl0 &= ~MDM_CTL0_DTR1;
106 mdm_ctl0 |= MDM_CTL0_DTR1;
109 MDM_CTL_0 = mdm_ctl0;
112 static u_int neponset_get_mctrl(struct uart_port *port)
114 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
115 u_int mdm_ctl1 = MDM_CTL_1;
117 if (port->mapbase == _Ser1UTCR0) {
118 if (mdm_ctl1 & MDM_CTL1_DCD2)
120 if (mdm_ctl1 & MDM_CTL1_CTS2)
122 if (mdm_ctl1 & MDM_CTL1_DSR2)
124 } else if (port->mapbase == _Ser3UTCR0) {
125 if (mdm_ctl1 & MDM_CTL1_DCD1)
127 if (mdm_ctl1 & MDM_CTL1_CTS1)
129 if (mdm_ctl1 & MDM_CTL1_DSR1)
136 static struct sa1100_port_fns neponset_port_fns __devinitdata = {
137 .set_mctrl = neponset_set_mctrl,
138 .get_mctrl = neponset_get_mctrl,
141 static int __devinit neponset_probe(struct platform_device *dev)
143 sa1100_register_uart_fns(&neponset_port_fns);
146 * Install handler for GPIO25.
148 irq_set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING);
149 irq_set_chained_handler(IRQ_GPIO25, neponset_irq_handler);
152 * We would set IRQ_GPIO25 to be a wake-up IRQ, but
153 * unfortunately something on the Neponset activates
154 * this IRQ on sleep (ethernet?)
157 enable_irq_wake(IRQ_GPIO25);
161 * Setup other Neponset IRQs. SA1111 will be done by the
162 * generic SA1111 code.
164 irq_set_handler(IRQ_NEPONSET_SMC9196, handle_simple_irq);
165 set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
166 irq_set_handler(IRQ_NEPONSET_USAR, handle_simple_irq);
167 set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
170 * Disable GPIO 0/1 drivers so the buttons work on the module.
172 NCR_0 = NCR_GP01_OFF;
180 * LDM power management.
182 static unsigned int neponset_saved_state;
184 static int neponset_suspend(struct platform_device *dev, pm_message_t state)
189 neponset_saved_state = NCR_0;
194 static int neponset_resume(struct platform_device *dev)
196 NCR_0 = neponset_saved_state;
202 #define neponset_suspend NULL
203 #define neponset_resume NULL
206 static struct platform_driver neponset_device_driver = {
207 .probe = neponset_probe,
208 .suspend = neponset_suspend,
209 .resume = neponset_resume,
215 static struct resource neponset_resources[] = {
216 [0] = DEFINE_RES_MEM(0x10000000, 0x08000000),
219 static struct platform_device neponset_device = {
222 .num_resources = ARRAY_SIZE(neponset_resources),
223 .resource = neponset_resources,
226 static struct resource sa1111_resources[] = {
227 [0] = DEFINE_RES_MEM(0x40000000, SZ_8K),
228 [1] = DEFINE_RES_IRQ(IRQ_NEPONSET_SA1111),
231 static struct sa1111_platform_data sa1111_info = {
232 .irq_base = IRQ_BOARD_END,
235 static u64 sa1111_dmamask = 0xffffffffUL;
237 static struct platform_device sa1111_device = {
241 .dma_mask = &sa1111_dmamask,
242 .coherent_dma_mask = 0xffffffff,
243 .platform_data = &sa1111_info,
245 .num_resources = ARRAY_SIZE(sa1111_resources),
246 .resource = sa1111_resources,
249 static struct resource smc91x_resources[] = {
250 [0] = DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS, 0x02000000, "smc91x-regs"),
251 [1] = DEFINE_RES_IRQ(IRQ_NEPONSET_SMC9196),
252 [2] = DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000,
253 0x02000000, "smc91x-attrib"),
256 static struct platform_device smc91x_device = {
259 .num_resources = ARRAY_SIZE(smc91x_resources),
260 .resource = smc91x_resources,
263 static struct platform_device *devices[] __initdata = {
269 extern void sa1110_mb_disable(void);
271 static int __init neponset_init(void)
273 platform_driver_register(&neponset_device_driver);
276 * The Neponset is only present on the Assabet machine type.
278 if (!machine_is_assabet())
282 * Ensure that the memory bus request/grant signals are setup,
283 * and the grant is held in its inactive state, whether or not
284 * we actually have a Neponset attached.
288 if (!machine_has_neponset()) {
289 printk(KERN_DEBUG "Neponset expansion board not present\n");
293 if (WHOAMI != 0x11) {
294 printk(KERN_WARNING "Neponset board detected, but "
295 "wrong ID: %02x\n", WHOAMI);
299 return platform_add_devices(devices, ARRAY_SIZE(devices));
302 subsys_initcall(neponset_init);
304 static struct map_desc neponset_io_desc[] __initdata = {
305 { /* System Registers */
306 .virtual = 0xf3000000,
307 .pfn = __phys_to_pfn(0x10000000),
311 .virtual = 0xf4000000,
312 .pfn = __phys_to_pfn(0x40000000),
318 void __init neponset_map_io(void)
320 iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));