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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-sa1100/neponset.c | |
1da177e4 | 3 | */ |
9590e898 | 4 | #include <linux/err.h> |
1da177e4 | 5 | #include <linux/init.h> |
1da177e4 | 6 | #include <linux/ioport.h> |
ced8d21c | 7 | #include <linux/irq.h> |
92e617d9 | 8 | #include <linux/kernel.h> |
ae14c2e2 | 9 | #include <linux/module.h> |
6920b5a7 | 10 | #include <linux/platform_data/sa11x0-serial.h> |
d052d1be | 11 | #include <linux/platform_device.h> |
51f93390 | 12 | #include <linux/pm.h> |
92e617d9 | 13 | #include <linux/serial_core.h> |
ae14c2e2 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | |
1da177e4 | 16 | #include <asm/mach-types.h> |
1da177e4 | 17 | #include <asm/mach/map.h> |
1da177e4 LT |
18 | #include <asm/hardware/sa1111.h> |
19 | #include <asm/sizes.h> | |
20 | ||
92e617d9 RK |
21 | #include <mach/hardware.h> |
22 | #include <mach/assabet.h> | |
23 | #include <mach/neponset.h> | |
f314f33b | 24 | #include <mach/irqs.h> |
92e617d9 | 25 | |
ced8d21c RK |
26 | #define NEP_IRQ_SMC91X 0 |
27 | #define NEP_IRQ_USAR 1 | |
28 | #define NEP_IRQ_SA1111 2 | |
29 | #define NEP_IRQ_NR 3 | |
30 | ||
f942b0fd RK |
31 | #define WHOAMI 0x00 |
32 | #define LEDS 0x10 | |
33 | #define SWPK 0x20 | |
34 | #define IRR 0x24 | |
35 | #define KP_Y_IN 0x80 | |
36 | #define KP_X_OUT 0x90 | |
37 | #define NCR_0 0xa0 | |
38 | #define MDM_CTL_0 0xb0 | |
39 | #define MDM_CTL_1 0xb4 | |
40 | #define AUD_CTL 0xc0 | |
41 | ||
42 | #define IRR_ETHERNET (1 << 0) | |
43 | #define IRR_USAR (1 << 1) | |
44 | #define IRR_SA1111 (1 << 2) | |
45 | ||
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) | |
50 | ||
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) | |
57 | ||
58 | #define AUD_SEL_1341 (1 << 0) | |
59 | #define AUD_MUTE_1341 (1 << 1) | |
60 | ||
bab50a35 RK |
61 | extern void sa1110_mb_disable(void); |
62 | ||
ae14c2e2 | 63 | struct neponset_drvdata { |
f942b0fd | 64 | void __iomem *base; |
9590e898 RK |
65 | struct platform_device *sa1111; |
66 | struct platform_device *smc91x; | |
ced8d21c | 67 | unsigned irq_base; |
ae14c2e2 RK |
68 | #ifdef CONFIG_PM_SLEEP |
69 | u32 ncr0; | |
70 | u32 mdm_ctl_0; | |
71 | #endif | |
72 | }; | |
73 | ||
f942b0fd RK |
74 | static void __iomem *nep_base; |
75 | ||
6ad1b614 RK |
76 | void neponset_ncr_frob(unsigned int mask, unsigned int val) |
77 | { | |
f942b0fd RK |
78 | void __iomem *base = nep_base; |
79 | ||
80 | if (base) { | |
81 | unsigned long flags; | |
82 | unsigned v; | |
83 | ||
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); | |
88 | } else { | |
89 | WARN(1, "nep_base unset\n"); | |
90 | } | |
6ad1b614 | 91 | } |
ef0c1484 | 92 | EXPORT_SYMBOL(neponset_ncr_frob); |
6ad1b614 | 93 | |
92e617d9 RK |
94 | static void neponset_set_mctrl(struct uart_port *port, u_int mctrl) |
95 | { | |
f942b0fd RK |
96 | void __iomem *base = nep_base; |
97 | u_int mdm_ctl0; | |
98 | ||
99 | if (!base) | |
100 | return; | |
92e617d9 | 101 | |
f942b0fd | 102 | mdm_ctl0 = readb_relaxed(base + MDM_CTL_0); |
92e617d9 RK |
103 | if (port->mapbase == _Ser1UTCR0) { |
104 | if (mctrl & TIOCM_RTS) | |
105 | mdm_ctl0 &= ~MDM_CTL0_RTS2; | |
106 | else | |
107 | mdm_ctl0 |= MDM_CTL0_RTS2; | |
108 | ||
109 | if (mctrl & TIOCM_DTR) | |
110 | mdm_ctl0 &= ~MDM_CTL0_DTR2; | |
111 | else | |
112 | mdm_ctl0 |= MDM_CTL0_DTR2; | |
113 | } else if (port->mapbase == _Ser3UTCR0) { | |
114 | if (mctrl & TIOCM_RTS) | |
115 | mdm_ctl0 &= ~MDM_CTL0_RTS1; | |
116 | else | |
117 | mdm_ctl0 |= MDM_CTL0_RTS1; | |
118 | ||
119 | if (mctrl & TIOCM_DTR) | |
120 | mdm_ctl0 &= ~MDM_CTL0_DTR1; | |
121 | else | |
122 | mdm_ctl0 |= MDM_CTL0_DTR1; | |
123 | } | |
124 | ||
f942b0fd | 125 | writeb_relaxed(mdm_ctl0, base + MDM_CTL_0); |
92e617d9 RK |
126 | } |
127 | ||
128 | static u_int neponset_get_mctrl(struct uart_port *port) | |
129 | { | |
f942b0fd | 130 | void __iomem *base = nep_base; |
92e617d9 | 131 | u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; |
f942b0fd | 132 | u_int mdm_ctl1; |
92e617d9 | 133 | |
f942b0fd RK |
134 | if (!base) |
135 | return ret; | |
136 | ||
137 | mdm_ctl1 = readb_relaxed(base + MDM_CTL_1); | |
92e617d9 RK |
138 | if (port->mapbase == _Ser1UTCR0) { |
139 | if (mdm_ctl1 & MDM_CTL1_DCD2) | |
140 | ret &= ~TIOCM_CD; | |
141 | if (mdm_ctl1 & MDM_CTL1_CTS2) | |
142 | ret &= ~TIOCM_CTS; | |
143 | if (mdm_ctl1 & MDM_CTL1_DSR2) | |
144 | ret &= ~TIOCM_DSR; | |
145 | } else if (port->mapbase == _Ser3UTCR0) { | |
146 | if (mdm_ctl1 & MDM_CTL1_DCD1) | |
147 | ret &= ~TIOCM_CD; | |
148 | if (mdm_ctl1 & MDM_CTL1_CTS1) | |
149 | ret &= ~TIOCM_CTS; | |
150 | if (mdm_ctl1 & MDM_CTL1_DSR1) | |
151 | ret &= ~TIOCM_DSR; | |
152 | } | |
153 | ||
154 | return ret; | |
155 | } | |
156 | ||
351a102d | 157 | static struct sa1100_port_fns neponset_port_fns = { |
92e617d9 RK |
158 | .set_mctrl = neponset_set_mctrl, |
159 | .get_mctrl = neponset_get_mctrl, | |
160 | }; | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * Install handler for Neponset IRQ. Note that we have to loop here | |
164 | * since the ETHERNET and USAR IRQs are level based, and we need to | |
165 | * ensure that the IRQ signal is deasserted before returning. This | |
166 | * is rather unfortunate. | |
167 | */ | |
ced8d21c | 168 | static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc) |
1da177e4 | 169 | { |
ced8d21c | 170 | struct neponset_drvdata *d = irq_desc_get_handler_data(desc); |
1da177e4 LT |
171 | unsigned int irr; |
172 | ||
173 | while (1) { | |
1da177e4 LT |
174 | /* |
175 | * Acknowledge the parent IRQ. | |
176 | */ | |
c4e8964e | 177 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
1da177e4 LT |
178 | |
179 | /* | |
180 | * Read the interrupt reason register. Let's have all | |
181 | * active IRQ bits high. Note: there is a typo in the | |
182 | * Neponset user's guide for the SA1111 IRR level. | |
183 | */ | |
f942b0fd RK |
184 | irr = readb_relaxed(d->base + IRR); |
185 | irr ^= IRR_ETHERNET | IRR_USAR; | |
1da177e4 LT |
186 | |
187 | if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0) | |
188 | break; | |
189 | ||
190 | /* | |
191 | * Since there is no individual mask, we have to | |
192 | * mask the parent IRQ. This is safe, since we'll | |
193 | * recheck the register for any pending IRQs. | |
194 | */ | |
195 | if (irr & (IRR_ETHERNET | IRR_USAR)) { | |
c4e8964e | 196 | desc->irq_data.chip->irq_mask(&desc->irq_data); |
1da177e4 | 197 | |
d782f33d RK |
198 | /* |
199 | * Ack the interrupt now to prevent re-entering | |
200 | * this neponset handler. Again, this is safe | |
201 | * since we'll check the IRR register prior to | |
202 | * leaving. | |
203 | */ | |
c4e8964e | 204 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
d782f33d | 205 | |
ced8d21c RK |
206 | if (irr & IRR_ETHERNET) |
207 | generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X); | |
1da177e4 | 208 | |
ced8d21c RK |
209 | if (irr & IRR_USAR) |
210 | generic_handle_irq(d->irq_base + NEP_IRQ_USAR); | |
1da177e4 | 211 | |
c4e8964e | 212 | desc->irq_data.chip->irq_unmask(&desc->irq_data); |
1da177e4 LT |
213 | } |
214 | ||
ced8d21c RK |
215 | if (irr & IRR_SA1111) |
216 | generic_handle_irq(d->irq_base + NEP_IRQ_SA1111); | |
1da177e4 LT |
217 | } |
218 | } | |
219 | ||
ced8d21c | 220 | /* Yes, we really do not have any kind of masking or unmasking */ |
71045520 RK |
221 | static void nochip_noop(struct irq_data *irq) |
222 | { | |
223 | } | |
224 | ||
225 | static struct irq_chip nochip = { | |
226 | .name = "neponset", | |
227 | .irq_ack = nochip_noop, | |
228 | .irq_mask = nochip_noop, | |
229 | .irq_unmask = nochip_noop, | |
230 | }; | |
231 | ||
92e617d9 | 232 | static struct sa1111_platform_data sa1111_info = { |
07be45f5 | 233 | .disable_devs = SA1111_DEVID_PS2_MSE, |
92e617d9 RK |
234 | }; |
235 | ||
351a102d | 236 | static int neponset_probe(struct platform_device *dev) |
1da177e4 | 237 | { |
ae14c2e2 | 238 | struct neponset_drvdata *d; |
f942b0fd | 239 | struct resource *nep_res, *sa1111_res, *smc91x_res; |
ced8d21c RK |
240 | struct resource sa1111_resources[] = { |
241 | DEFINE_RES_MEM(0x40000000, SZ_8K), | |
242 | { .flags = IORESOURCE_IRQ }, | |
243 | }; | |
9590e898 RK |
244 | struct platform_device_info sa1111_devinfo = { |
245 | .parent = &dev->dev, | |
246 | .name = "sa1111", | |
247 | .id = 0, | |
248 | .res = sa1111_resources, | |
249 | .num_res = ARRAY_SIZE(sa1111_resources), | |
250 | .data = &sa1111_info, | |
251 | .size_data = sizeof(sa1111_info), | |
252 | .dma_mask = 0xffffffffUL, | |
253 | }; | |
ced8d21c RK |
254 | struct resource smc91x_resources[] = { |
255 | DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS, | |
256 | 0x02000000, "smc91x-regs"), | |
257 | DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000, | |
258 | 0x02000000, "smc91x-attrib"), | |
259 | { .flags = IORESOURCE_IRQ }, | |
260 | }; | |
9590e898 RK |
261 | struct platform_device_info smc91x_devinfo = { |
262 | .parent = &dev->dev, | |
263 | .name = "smc91x", | |
264 | .id = 0, | |
265 | .res = smc91x_resources, | |
266 | .num_res = ARRAY_SIZE(smc91x_resources), | |
267 | }; | |
b6bdfcf5 RK |
268 | int ret, irq; |
269 | ||
f942b0fd RK |
270 | if (nep_base) |
271 | return -EBUSY; | |
272 | ||
b6bdfcf5 RK |
273 | irq = ret = platform_get_irq(dev, 0); |
274 | if (ret < 0) | |
275 | goto err_alloc; | |
ae14c2e2 | 276 | |
f942b0fd | 277 | nep_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
d2e539a5 RK |
278 | smc91x_res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
279 | sa1111_res = platform_get_resource(dev, IORESOURCE_MEM, 2); | |
f942b0fd | 280 | if (!nep_res || !smc91x_res || !sa1111_res) { |
d2e539a5 RK |
281 | ret = -ENXIO; |
282 | goto err_alloc; | |
283 | } | |
284 | ||
ae14c2e2 RK |
285 | d = kzalloc(sizeof(*d), GFP_KERNEL); |
286 | if (!d) { | |
287 | ret = -ENOMEM; | |
288 | goto err_alloc; | |
289 | } | |
290 | ||
f942b0fd RK |
291 | d->base = ioremap(nep_res->start, SZ_4K); |
292 | if (!d->base) { | |
293 | ret = -ENOMEM; | |
294 | goto err_ioremap; | |
295 | } | |
296 | ||
297 | if (readb_relaxed(d->base + WHOAMI) != 0x11) { | |
298 | dev_warn(&dev->dev, "Neponset board detected, but wrong ID: %02x\n", | |
299 | readb_relaxed(d->base + WHOAMI)); | |
300 | ret = -ENODEV; | |
301 | goto err_id; | |
302 | } | |
303 | ||
ced8d21c RK |
304 | ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1); |
305 | if (ret <= 0) { | |
306 | dev_err(&dev->dev, "unable to allocate %u irqs: %d\n", | |
307 | NEP_IRQ_NR, ret); | |
308 | if (ret == 0) | |
309 | ret = -ENOMEM; | |
310 | goto err_irq_alloc; | |
311 | } | |
312 | ||
313 | d->irq_base = ret; | |
314 | ||
315 | irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip, | |
316 | handle_simple_irq); | |
317 | set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID | IRQF_PROBE); | |
318 | irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip, | |
319 | handle_simple_irq); | |
320 | set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID | IRQF_PROBE); | |
321 | irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip); | |
1da177e4 | 322 | |
b6bdfcf5 RK |
323 | irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING); |
324 | irq_set_handler_data(irq, d); | |
325 | irq_set_chained_handler(irq, neponset_irq_handler); | |
1da177e4 LT |
326 | |
327 | /* | |
ced8d21c RK |
328 | * We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately |
329 | * something on the Neponset activates this IRQ on sleep (eth?) | |
1da177e4 LT |
330 | */ |
331 | #if 0 | |
b6bdfcf5 | 332 | enable_irq_wake(irq); |
1da177e4 LT |
333 | #endif |
334 | ||
ced8d21c RK |
335 | dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n", |
336 | d->irq_base, d->irq_base + NEP_IRQ_NR - 1); | |
f942b0fd | 337 | nep_base = d->base; |
1da177e4 | 338 | |
ced8d21c RK |
339 | sa1100_register_uart_fns(&neponset_port_fns); |
340 | ||
bab50a35 RK |
341 | /* Ensure that the memory bus request/grant signals are setup */ |
342 | sa1110_mb_disable(); | |
343 | ||
ced8d21c | 344 | /* Disable GPIO 0/1 drivers so the buttons work on the Assabet */ |
f942b0fd | 345 | writeb_relaxed(NCR_GP01_OFF, d->base + NCR_0); |
1da177e4 | 346 | |
d2e539a5 | 347 | sa1111_resources[0].parent = sa1111_res; |
ced8d21c RK |
348 | sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111; |
349 | sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111; | |
9590e898 | 350 | d->sa1111 = platform_device_register_full(&sa1111_devinfo); |
ced8d21c | 351 | |
d2e539a5 RK |
352 | smc91x_resources[0].parent = smc91x_res; |
353 | smc91x_resources[1].parent = smc91x_res; | |
ced8d21c RK |
354 | smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X; |
355 | smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X; | |
9590e898 RK |
356 | d->smc91x = platform_device_register_full(&smc91x_devinfo); |
357 | ||
ae14c2e2 RK |
358 | platform_set_drvdata(dev, d); |
359 | ||
1da177e4 | 360 | return 0; |
ae14c2e2 | 361 | |
ced8d21c | 362 | err_irq_alloc: |
f942b0fd RK |
363 | err_id: |
364 | iounmap(d->base); | |
365 | err_ioremap: | |
ced8d21c | 366 | kfree(d); |
ae14c2e2 RK |
367 | err_alloc: |
368 | return ret; | |
1da177e4 LT |
369 | } |
370 | ||
351a102d | 371 | static int neponset_remove(struct platform_device *dev) |
ae14c2e2 RK |
372 | { |
373 | struct neponset_drvdata *d = platform_get_drvdata(dev); | |
b6bdfcf5 | 374 | int irq = platform_get_irq(dev, 0); |
1da177e4 | 375 | |
9590e898 RK |
376 | if (!IS_ERR(d->sa1111)) |
377 | platform_device_unregister(d->sa1111); | |
378 | if (!IS_ERR(d->smc91x)) | |
379 | platform_device_unregister(d->smc91x); | |
b6bdfcf5 | 380 | irq_set_chained_handler(irq, NULL); |
ced8d21c | 381 | irq_free_descs(d->irq_base, NEP_IRQ_NR); |
f942b0fd RK |
382 | nep_base = NULL; |
383 | iounmap(d->base); | |
ae14c2e2 RK |
384 | kfree(d); |
385 | ||
386 | return 0; | |
387 | } | |
93160c63 | 388 | |
51f93390 RK |
389 | #ifdef CONFIG_PM_SLEEP |
390 | static int neponset_suspend(struct device *dev) | |
1da177e4 | 391 | { |
51f93390 | 392 | struct neponset_drvdata *d = dev_get_drvdata(dev); |
ae14c2e2 | 393 | |
f942b0fd RK |
394 | d->ncr0 = readb_relaxed(d->base + NCR_0); |
395 | d->mdm_ctl_0 = readb_relaxed(d->base + MDM_CTL_0); | |
1da177e4 LT |
396 | |
397 | return 0; | |
398 | } | |
399 | ||
51f93390 | 400 | static int neponset_resume(struct device *dev) |
1da177e4 | 401 | { |
51f93390 | 402 | struct neponset_drvdata *d = dev_get_drvdata(dev); |
ae14c2e2 | 403 | |
f942b0fd RK |
404 | writeb_relaxed(d->ncr0, d->base + NCR_0); |
405 | writeb_relaxed(d->mdm_ctl_0, d->base + MDM_CTL_0); | |
1da177e4 LT |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
51f93390 RK |
410 | static const struct dev_pm_ops neponset_pm_ops = { |
411 | .suspend_noirq = neponset_suspend, | |
412 | .resume_noirq = neponset_resume, | |
413 | .freeze_noirq = neponset_suspend, | |
414 | .restore_noirq = neponset_resume, | |
415 | }; | |
416 | #define PM_OPS &neponset_pm_ops | |
1da177e4 | 417 | #else |
51f93390 | 418 | #define PM_OPS NULL |
1da177e4 LT |
419 | #endif |
420 | ||
3ae5eaec | 421 | static struct platform_driver neponset_device_driver = { |
1da177e4 | 422 | .probe = neponset_probe, |
351a102d | 423 | .remove = neponset_remove, |
3ae5eaec RK |
424 | .driver = { |
425 | .name = "neponset", | |
398e58d0 | 426 | .owner = THIS_MODULE, |
51f93390 | 427 | .pm = PM_OPS, |
3ae5eaec | 428 | }, |
1da177e4 LT |
429 | }; |
430 | ||
1da177e4 LT |
431 | static int __init neponset_init(void) |
432 | { | |
bab50a35 | 433 | return platform_driver_register(&neponset_device_driver); |
1da177e4 LT |
434 | } |
435 | ||
436 | subsys_initcall(neponset_init); |