1
2
3
4#include <linux/err.h>
5#include <linux/init.h>
6#include <linux/ioport.h>
7#include <linux/irq.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/platform_data/sa11x0-serial.h>
11#include <linux/platform_device.h>
12#include <linux/pm.h>
13#include <linux/serial_core.h>
14#include <linux/slab.h>
15
16#include <asm/mach-types.h>
17#include <asm/mach/map.h>
18#include <asm/hardware/sa1111.h>
19#include <asm/sizes.h>
20
21#include <mach/hardware.h>
22#include <mach/assabet.h>
23#include <mach/neponset.h>
24#include <mach/irqs.h>
25
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
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
61extern void sa1110_mb_disable(void);
62
63struct neponset_drvdata {
64 void __iomem *base;
65 struct platform_device *sa1111;
66 struct platform_device *smc91x;
67 unsigned irq_base;
68#ifdef CONFIG_PM_SLEEP
69 u32 ncr0;
70 u32 mdm_ctl_0;
71#endif
72};
73
74static void __iomem *nep_base;
75
76void neponset_ncr_frob(unsigned int mask, unsigned int val)
77{
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 }
91}
92EXPORT_SYMBOL(neponset_ncr_frob);
93
94static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
95{
96 void __iomem *base = nep_base;
97 u_int mdm_ctl0;
98
99 if (!base)
100 return;
101
102 mdm_ctl0 = readb_relaxed(base + MDM_CTL_0);
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
125 writeb_relaxed(mdm_ctl0, base + MDM_CTL_0);
126}
127
128static u_int neponset_get_mctrl(struct uart_port *port)
129{
130 void __iomem *base = nep_base;
131 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
132 u_int mdm_ctl1;
133
134 if (!base)
135 return ret;
136
137 mdm_ctl1 = readb_relaxed(base + MDM_CTL_1);
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
157static struct sa1100_port_fns neponset_port_fns = {
158 .set_mctrl = neponset_set_mctrl,
159 .get_mctrl = neponset_get_mctrl,
160};
161
162
163
164
165
166
167
168static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
169{
170 struct neponset_drvdata *d = irq_desc_get_handler_data(desc);
171 unsigned int irr;
172
173 while (1) {
174
175
176
177 desc->irq_data.chip->irq_ack(&desc->irq_data);
178
179
180
181
182
183
184 irr = readb_relaxed(d->base + IRR);
185 irr ^= IRR_ETHERNET | IRR_USAR;
186
187 if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
188 break;
189
190
191
192
193
194
195 if (irr & (IRR_ETHERNET | IRR_USAR)) {
196 desc->irq_data.chip->irq_mask(&desc->irq_data);
197
198
199
200
201
202
203
204 desc->irq_data.chip->irq_ack(&desc->irq_data);
205
206 if (irr & IRR_ETHERNET)
207 generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X);
208
209 if (irr & IRR_USAR)
210 generic_handle_irq(d->irq_base + NEP_IRQ_USAR);
211
212 desc->irq_data.chip->irq_unmask(&desc->irq_data);
213 }
214
215 if (irr & IRR_SA1111)
216 generic_handle_irq(d->irq_base + NEP_IRQ_SA1111);
217 }
218}
219
220
221static void nochip_noop(struct irq_data *irq)
222{
223}
224
225static struct irq_chip nochip = {
226 .name = "neponset",
227 .irq_ack = nochip_noop,
228 .irq_mask = nochip_noop,
229 .irq_unmask = nochip_noop,
230};
231
232static struct sa1111_platform_data sa1111_info = {
233 .disable_devs = SA1111_DEVID_PS2_MSE,
234};
235
236static int neponset_probe(struct platform_device *dev)
237{
238 struct neponset_drvdata *d;
239 struct resource *nep_res, *sa1111_res, *smc91x_res;
240 struct resource sa1111_resources[] = {
241 DEFINE_RES_MEM(0x40000000, SZ_8K),
242 { .flags = IORESOURCE_IRQ },
243 };
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 };
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 };
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 };
268 int ret, irq;
269
270 if (nep_base)
271 return -EBUSY;
272
273 irq = ret = platform_get_irq(dev, 0);
274 if (ret < 0)
275 goto err_alloc;
276
277 nep_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
278 smc91x_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
279 sa1111_res = platform_get_resource(dev, IORESOURCE_MEM, 2);
280 if (!nep_res || !smc91x_res || !sa1111_res) {
281 ret = -ENXIO;
282 goto err_alloc;
283 }
284
285 d = kzalloc(sizeof(*d), GFP_KERNEL);
286 if (!d) {
287 ret = -ENOMEM;
288 goto err_alloc;
289 }
290
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
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);
322
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);
326
327
328
329
330
331#if 0
332 enable_irq_wake(irq);
333#endif
334
335 dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n",
336 d->irq_base, d->irq_base + NEP_IRQ_NR - 1);
337 nep_base = d->base;
338
339 sa1100_register_uart_fns(&neponset_port_fns);
340
341
342 sa1110_mb_disable();
343
344
345 writeb_relaxed(NCR_GP01_OFF, d->base + NCR_0);
346
347 sa1111_resources[0].parent = sa1111_res;
348 sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111;
349 sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111;
350 d->sa1111 = platform_device_register_full(&sa1111_devinfo);
351
352 smc91x_resources[0].parent = smc91x_res;
353 smc91x_resources[1].parent = smc91x_res;
354 smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X;
355 smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X;
356 d->smc91x = platform_device_register_full(&smc91x_devinfo);
357
358 platform_set_drvdata(dev, d);
359
360 return 0;
361
362 err_irq_alloc:
363 err_id:
364 iounmap(d->base);
365 err_ioremap:
366 kfree(d);
367 err_alloc:
368 return ret;
369}
370
371static int neponset_remove(struct platform_device *dev)
372{
373 struct neponset_drvdata *d = platform_get_drvdata(dev);
374 int irq = platform_get_irq(dev, 0);
375
376 if (!IS_ERR(d->sa1111))
377 platform_device_unregister(d->sa1111);
378 if (!IS_ERR(d->smc91x))
379 platform_device_unregister(d->smc91x);
380 irq_set_chained_handler(irq, NULL);
381 irq_free_descs(d->irq_base, NEP_IRQ_NR);
382 nep_base = NULL;
383 iounmap(d->base);
384 kfree(d);
385
386 return 0;
387}
388
389#ifdef CONFIG_PM_SLEEP
390static int neponset_suspend(struct device *dev)
391{
392 struct neponset_drvdata *d = dev_get_drvdata(dev);
393
394 d->ncr0 = readb_relaxed(d->base + NCR_0);
395 d->mdm_ctl_0 = readb_relaxed(d->base + MDM_CTL_0);
396
397 return 0;
398}
399
400static int neponset_resume(struct device *dev)
401{
402 struct neponset_drvdata *d = dev_get_drvdata(dev);
403
404 writeb_relaxed(d->ncr0, d->base + NCR_0);
405 writeb_relaxed(d->mdm_ctl_0, d->base + MDM_CTL_0);
406
407 return 0;
408}
409
410static 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
417#else
418#define PM_OPS NULL
419#endif
420
421static struct platform_driver neponset_device_driver = {
422 .probe = neponset_probe,
423 .remove = neponset_remove,
424 .driver = {
425 .name = "neponset",
426 .owner = THIS_MODULE,
427 .pm = PM_OPS,
428 },
429};
430
431static int __init neponset_init(void)
432{
433 return platform_driver_register(&neponset_device_driver);
434}
435
436subsys_initcall(neponset_init);
437
