2 * linux/arch/arm/mach-sa1100/neponset.c
5 #include <linux/init.h>
6 #include <linux/ioport.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
12 #include <linux/serial_core.h>
13 #include <linux/slab.h>
15 #include <asm/mach-types.h>
16 #include <asm/mach/map.h>
17 #include <asm/mach/serial_sa1100.h>
18 #include <asm/hardware/sa1111.h>
19 #include <asm/sizes.h>
21 #include <mach/hardware.h>
22 #include <mach/assabet.h>
23 #include <mach/neponset.h>
24 #include <mach/irqs.h>
26 #define NEP_IRQ_SMC91X 0
27 #define NEP_IRQ_USAR 1
28 #define NEP_IRQ_SA1111 2
38 #define MDM_CTL_0 0xb0
39 #define MDM_CTL_1 0xb4
42 #define IRR_ETHERNET (1 << 0)
43 #define IRR_USAR (1 << 1)
44 #define IRR_SA1111 (1 << 2)
46 #define MDM_CTL0_RTS1 (1 << 0)
47 #define MDM_CTL0_DTR1 (1 << 1)
48 #define MDM_CTL0_RTS2 (1 << 2)
49 #define MDM_CTL0_DTR2 (1 << 3)
51 #define MDM_CTL1_CTS1 (1 << 0)
52 #define MDM_CTL1_DSR1 (1 << 1)
53 #define MDM_CTL1_DCD1 (1 << 2)
54 #define MDM_CTL1_CTS2 (1 << 3)
55 #define MDM_CTL1_DSR2 (1 << 4)
56 #define MDM_CTL1_DCD2 (1 << 5)
58 #define AUD_SEL_1341 (1 << 0)
59 #define AUD_MUTE_1341 (1 << 1)
61 extern void sa1110_mb_disable(void);
63 struct neponset_drvdata {
65 struct platform_device *sa1111;
66 struct platform_device *smc91x;
68 #ifdef CONFIG_PM_SLEEP
74 static void __iomem *nep_base;
76 void neponset_ncr_frob(unsigned int mask, unsigned int val)
78 void __iomem *base = nep_base;
84 local_irq_save(flags);
85 v = readb_relaxed(base + NCR_0);
86 writeb_relaxed((v & ~mask) | val, base + NCR_0);
87 local_irq_restore(flags);
89 WARN(1, "nep_base unset\n");
93 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
95 void __iomem *base = nep_base;
101 mdm_ctl0 = readb_relaxed(base + MDM_CTL_0);
102 if (port->mapbase == _Ser1UTCR0) {
103 if (mctrl & TIOCM_RTS)
104 mdm_ctl0 &= ~MDM_CTL0_RTS2;
106 mdm_ctl0 |= MDM_CTL0_RTS2;
108 if (mctrl & TIOCM_DTR)
109 mdm_ctl0 &= ~MDM_CTL0_DTR2;
111 mdm_ctl0 |= MDM_CTL0_DTR2;
112 } else if (port->mapbase == _Ser3UTCR0) {
113 if (mctrl & TIOCM_RTS)
114 mdm_ctl0 &= ~MDM_CTL0_RTS1;
116 mdm_ctl0 |= MDM_CTL0_RTS1;
118 if (mctrl & TIOCM_DTR)
119 mdm_ctl0 &= ~MDM_CTL0_DTR1;
121 mdm_ctl0 |= MDM_CTL0_DTR1;
124 writeb_relaxed(mdm_ctl0, base + MDM_CTL_0);
127 static u_int neponset_get_mctrl(struct uart_port *port)
129 void __iomem *base = nep_base;
130 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
136 mdm_ctl1 = readb_relaxed(base + MDM_CTL_1);
137 if (port->mapbase == _Ser1UTCR0) {
138 if (mdm_ctl1 & MDM_CTL1_DCD2)
140 if (mdm_ctl1 & MDM_CTL1_CTS2)
142 if (mdm_ctl1 & MDM_CTL1_DSR2)
144 } else if (port->mapbase == _Ser3UTCR0) {
145 if (mdm_ctl1 & MDM_CTL1_DCD1)
147 if (mdm_ctl1 & MDM_CTL1_CTS1)
149 if (mdm_ctl1 & MDM_CTL1_DSR1)
156 static struct sa1100_port_fns neponset_port_fns __devinitdata = {
157 .set_mctrl = neponset_set_mctrl,
158 .get_mctrl = neponset_get_mctrl,
162 * Install handler for Neponset IRQ. Note that we have to loop here
163 * since the ETHERNET and USAR IRQs are level based, and we need to
164 * ensure that the IRQ signal is deasserted before returning. This
165 * is rather unfortunate.
167 static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
169 struct neponset_drvdata *d = irq_desc_get_handler_data(desc);
174 * Acknowledge the parent IRQ.
176 desc->irq_data.chip->irq_ack(&desc->irq_data);
179 * Read the interrupt reason register. Let's have all
180 * active IRQ bits high. Note: there is a typo in the
181 * Neponset user's guide for the SA1111 IRR level.
183 irr = readb_relaxed(d->base + IRR);
184 irr ^= IRR_ETHERNET | IRR_USAR;
186 if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
190 * Since there is no individual mask, we have to
191 * mask the parent IRQ. This is safe, since we'll
192 * recheck the register for any pending IRQs.
194 if (irr & (IRR_ETHERNET | IRR_USAR)) {
195 desc->irq_data.chip->irq_mask(&desc->irq_data);
198 * Ack the interrupt now to prevent re-entering
199 * this neponset handler. Again, this is safe
200 * since we'll check the IRR register prior to
203 desc->irq_data.chip->irq_ack(&desc->irq_data);
205 if (irr & IRR_ETHERNET)
206 generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X);
209 generic_handle_irq(d->irq_base + NEP_IRQ_USAR);
211 desc->irq_data.chip->irq_unmask(&desc->irq_data);
214 if (irr & IRR_SA1111)
215 generic_handle_irq(d->irq_base + NEP_IRQ_SA1111);
219 /* Yes, we really do not have any kind of masking or unmasking */
220 static void nochip_noop(struct irq_data *irq)
224 static struct irq_chip nochip = {
226 .irq_ack = nochip_noop,
227 .irq_mask = nochip_noop,
228 .irq_unmask = nochip_noop,
231 static struct sa1111_platform_data sa1111_info = {
232 .disable_devs = SA1111_DEVID_PS2_MSE,
235 static int __devinit neponset_probe(struct platform_device *dev)
237 struct neponset_drvdata *d;
238 struct resource *nep_res, *sa1111_res, *smc91x_res;
239 struct resource sa1111_resources[] = {
240 DEFINE_RES_MEM(0x40000000, SZ_8K),
241 { .flags = IORESOURCE_IRQ },
243 struct platform_device_info sa1111_devinfo = {
247 .res = sa1111_resources,
248 .num_res = ARRAY_SIZE(sa1111_resources),
249 .data = &sa1111_info,
250 .size_data = sizeof(sa1111_info),
251 .dma_mask = 0xffffffffUL,
253 struct resource smc91x_resources[] = {
254 DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS,
255 0x02000000, "smc91x-regs"),
256 DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000,
257 0x02000000, "smc91x-attrib"),
258 { .flags = IORESOURCE_IRQ },
260 struct platform_device_info smc91x_devinfo = {
264 .res = smc91x_resources,
265 .num_res = ARRAY_SIZE(smc91x_resources),
272 irq = ret = platform_get_irq(dev, 0);
276 nep_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
277 smc91x_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
278 sa1111_res = platform_get_resource(dev, IORESOURCE_MEM, 2);
279 if (!nep_res || !smc91x_res || !sa1111_res) {
284 d = kzalloc(sizeof(*d), GFP_KERNEL);
290 d->base = ioremap(nep_res->start, SZ_4K);
296 if (readb_relaxed(d->base + WHOAMI) != 0x11) {
297 dev_warn(&dev->dev, "Neponset board detected, but wrong ID: %02x\n",
298 readb_relaxed(d->base + WHOAMI));
303 ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1);
305 dev_err(&dev->dev, "unable to allocate %u irqs: %d\n",
314 irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip,
316 set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID | IRQF_PROBE);
317 irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip,
319 set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID | IRQF_PROBE);
320 irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip);
322 irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
323 irq_set_handler_data(irq, d);
324 irq_set_chained_handler(irq, neponset_irq_handler);
327 * We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately
328 * something on the Neponset activates this IRQ on sleep (eth?)
331 enable_irq_wake(irq);
334 dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n",
335 d->irq_base, d->irq_base + NEP_IRQ_NR - 1);
338 sa1100_register_uart_fns(&neponset_port_fns);
340 /* Ensure that the memory bus request/grant signals are setup */
343 /* Disable GPIO 0/1 drivers so the buttons work on the Assabet */
344 writeb_relaxed(NCR_GP01_OFF, d->base + NCR_0);
346 sa1111_resources[0].parent = sa1111_res;
347 sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111;
348 sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111;
349 d->sa1111 = platform_device_register_full(&sa1111_devinfo);
351 smc91x_resources[0].parent = smc91x_res;
352 smc91x_resources[1].parent = smc91x_res;
353 smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X;
354 smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X;
355 d->smc91x = platform_device_register_full(&smc91x_devinfo);
357 platform_set_drvdata(dev, d);
370 static int __devexit neponset_remove(struct platform_device *dev)
372 struct neponset_drvdata *d = platform_get_drvdata(dev);
373 int irq = platform_get_irq(dev, 0);
375 if (!IS_ERR(d->sa1111))
376 platform_device_unregister(d->sa1111);
377 if (!IS_ERR(d->smc91x))
378 platform_device_unregister(d->smc91x);
379 irq_set_chained_handler(irq, NULL);
380 irq_free_descs(d->irq_base, NEP_IRQ_NR);
388 #ifdef CONFIG_PM_SLEEP
389 static int neponset_suspend(struct device *dev)
391 struct neponset_drvdata *d = dev_get_drvdata(dev);
393 d->ncr0 = readb_relaxed(d->base + NCR_0);
394 d->mdm_ctl_0 = readb_relaxed(d->base + MDM_CTL_0);
399 static int neponset_resume(struct device *dev)
401 struct neponset_drvdata *d = dev_get_drvdata(dev);
403 writeb_relaxed(d->ncr0, d->base + NCR_0);
404 writeb_relaxed(d->mdm_ctl_0, d->base + MDM_CTL_0);
409 static const struct dev_pm_ops neponset_pm_ops = {
410 .suspend_noirq = neponset_suspend,
411 .resume_noirq = neponset_resume,
412 .freeze_noirq = neponset_suspend,
413 .restore_noirq = neponset_resume,
415 #define PM_OPS &neponset_pm_ops
420 static struct platform_driver neponset_device_driver = {
421 .probe = neponset_probe,
422 .remove = __devexit_p(neponset_remove),
425 .owner = THIS_MODULE,
430 static int __init neponset_init(void)
432 return platform_driver_register(&neponset_device_driver);
435 subsys_initcall(neponset_init);