[PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks
[linux-2.6.git] / arch / arm / mach-sa1100 / neponset.c
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>
11 #include <linux/device.h>
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
62                         if (irr & IRR_ETHERNET) {
63                                 d = irq_desc + IRQ_NEPONSET_SMC9196;
64                                 desc_handle_irq(IRQ_NEPONSET_SMC9196, d, regs);
65                         }
66
67                         if (irr & IRR_USAR) {
68                                 d = irq_desc + IRQ_NEPONSET_USAR;
69                                 desc_handle_irq(IRQ_NEPONSET_USAR, d, regs);
70                         }
71
72                         desc->chip->unmask(irq);
73                 }
74
75                 if (irr & IRR_SA1111) {
76                         d = irq_desc + IRQ_NEPONSET_SA1111;
77                         desc_handle_irq(IRQ_NEPONSET_SA1111, d, regs);
78                 }
79         }
80 }
81
82 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
83 {
84         u_int mdm_ctl0 = MDM_CTL_0;
85
86         if (port->mapbase == _Ser1UTCR0) {
87                 if (mctrl & TIOCM_RTS)
88                         mdm_ctl0 &= ~MDM_CTL0_RTS2;
89                 else
90                         mdm_ctl0 |= MDM_CTL0_RTS2;
91
92                 if (mctrl & TIOCM_DTR)
93                         mdm_ctl0 &= ~MDM_CTL0_DTR2;
94                 else
95                         mdm_ctl0 |= MDM_CTL0_DTR2;
96         } else if (port->mapbase == _Ser3UTCR0) {
97                 if (mctrl & TIOCM_RTS)
98                         mdm_ctl0 &= ~MDM_CTL0_RTS1;
99                 else
100                         mdm_ctl0 |= MDM_CTL0_RTS1;
101
102                 if (mctrl & TIOCM_DTR)
103                         mdm_ctl0 &= ~MDM_CTL0_DTR1;
104                 else
105                         mdm_ctl0 |= MDM_CTL0_DTR1;
106         }
107
108         MDM_CTL_0 = mdm_ctl0;
109 }
110
111 static u_int neponset_get_mctrl(struct uart_port *port)
112 {
113         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
114         u_int mdm_ctl1 = MDM_CTL_1;
115
116         if (port->mapbase == _Ser1UTCR0) {
117                 if (mdm_ctl1 & MDM_CTL1_DCD2)
118                         ret &= ~TIOCM_CD;
119                 if (mdm_ctl1 & MDM_CTL1_CTS2)
120                         ret &= ~TIOCM_CTS;
121                 if (mdm_ctl1 & MDM_CTL1_DSR2)
122                         ret &= ~TIOCM_DSR;
123         } else if (port->mapbase == _Ser3UTCR0) {
124                 if (mdm_ctl1 & MDM_CTL1_DCD1)
125                         ret &= ~TIOCM_CD;
126                 if (mdm_ctl1 & MDM_CTL1_CTS1)
127                         ret &= ~TIOCM_CTS;
128                 if (mdm_ctl1 & MDM_CTL1_DSR1)
129                         ret &= ~TIOCM_DSR;
130         }
131
132         return ret;
133 }
134
135 static struct sa1100_port_fns neponset_port_fns __initdata = {
136         .set_mctrl      = neponset_set_mctrl,
137         .get_mctrl      = neponset_get_mctrl,
138 };
139
140 static int neponset_probe(struct device *dev)
141 {
142         sa1100_register_uart_fns(&neponset_port_fns);
143
144         /*
145          * Install handler for GPIO25.
146          */
147         set_irq_type(IRQ_GPIO25, IRQT_RISING);
148         set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler);
149
150         /*
151          * We would set IRQ_GPIO25 to be a wake-up IRQ, but
152          * unfortunately something on the Neponset activates
153          * this IRQ on sleep (ethernet?)
154          */
155 #if 0
156         enable_irq_wake(IRQ_GPIO25);
157 #endif
158
159         /*
160          * Setup other Neponset IRQs.  SA1111 will be done by the
161          * generic SA1111 code.
162          */
163         set_irq_handler(IRQ_NEPONSET_SMC9196, do_simple_IRQ);
164         set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
165         set_irq_handler(IRQ_NEPONSET_USAR, do_simple_IRQ);
166         set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
167
168         /*
169          * Disable GPIO 0/1 drivers so the buttons work on the module.
170          */
171         NCR_0 = NCR_GP01_OFF;
172
173         return 0;
174 }
175
176 #ifdef CONFIG_PM
177
178 /*
179  * LDM power management.
180  */
181 static int neponset_suspend(struct device *dev, pm_message_t state)
182 {
183         /*
184          * Save state.
185          */
186         if (!dev->power.saved_state)
187                 dev->power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL);
188         if (!dev->power.saved_state)
189                 return -ENOMEM;
190
191         *(unsigned int *)dev->power.saved_state = NCR_0;
192
193         return 0;
194 }
195
196 static int neponset_resume(struct device *dev)
197 {
198         if (dev->power.saved_state) {
199                 NCR_0 = *(unsigned int *)dev->power.saved_state;
200                 kfree(dev->power.saved_state);
201                 dev->power.saved_state = NULL;
202         }
203
204         return 0;
205 }
206
207 #else
208 #define neponset_suspend NULL
209 #define neponset_resume  NULL
210 #endif
211
212 static struct device_driver neponset_device_driver = {
213         .name           = "neponset",
214         .bus            = &platform_bus_type,
215         .probe          = neponset_probe,
216         .suspend        = neponset_suspend,
217         .resume         = neponset_resume,
218 };
219
220 static struct resource neponset_resources[] = {
221         [0] = {
222                 .start  = 0x10000000,
223                 .end    = 0x17ffffff,
224                 .flags  = IORESOURCE_MEM,
225         },
226 };
227
228 static struct platform_device neponset_device = {
229         .name           = "neponset",
230         .id             = 0,
231         .num_resources  = ARRAY_SIZE(neponset_resources),
232         .resource       = neponset_resources,
233 };
234
235 static struct resource sa1111_resources[] = {
236         [0] = {
237                 .start  = 0x40000000,
238                 .end    = 0x40001fff,
239                 .flags  = IORESOURCE_MEM,
240         },
241         [1] = {
242                 .start  = IRQ_NEPONSET_SA1111,
243                 .end    = IRQ_NEPONSET_SA1111,
244                 .flags  = IORESOURCE_IRQ,
245         },
246 };
247
248 static u64 sa1111_dmamask = 0xffffffffUL;
249
250 static struct platform_device sa1111_device = {
251         .name           = "sa1111",
252         .id             = 0,
253         .dev            = {
254                 .dma_mask = &sa1111_dmamask,
255                 .coherent_dma_mask = 0xffffffff,
256         },
257         .num_resources  = ARRAY_SIZE(sa1111_resources),
258         .resource       = sa1111_resources,
259 };
260
261 static struct resource smc91x_resources[] = {
262         [0] = {
263                 .name   = "smc91x-regs",
264                 .start  = SA1100_CS3_PHYS,
265                 .end    = SA1100_CS3_PHYS + 0x01ffffff,
266                 .flags  = IORESOURCE_MEM,
267         },
268         [1] = {
269                 .start  = IRQ_NEPONSET_SMC9196,
270                 .end    = IRQ_NEPONSET_SMC9196,
271                 .flags  = IORESOURCE_IRQ,
272         },
273         [2] = {
274                 .name   = "smc91x-attrib",
275                 .start  = SA1100_CS3_PHYS + 0x02000000,
276                 .end    = SA1100_CS3_PHYS + 0x03ffffff,
277                 .flags  = IORESOURCE_MEM,
278         },
279 };
280
281 static struct platform_device smc91x_device = {
282         .name           = "smc91x",
283         .id             = 0,
284         .num_resources  = ARRAY_SIZE(smc91x_resources),
285         .resource       = smc91x_resources,
286 };
287
288 static struct platform_device *devices[] __initdata = {
289         &neponset_device,
290         &sa1111_device,
291         &smc91x_device,
292 };
293
294 static int __init neponset_init(void)
295 {
296         driver_register(&neponset_device_driver);
297
298         /*
299          * The Neponset is only present on the Assabet machine type.
300          */
301         if (!machine_is_assabet())
302                 return -ENODEV;
303
304         /*
305          * Ensure that the memory bus request/grant signals are setup,
306          * and the grant is held in its inactive state, whether or not
307          * we actually have a Neponset attached.
308          */
309         sa1110_mb_disable();
310
311         if (!machine_has_neponset()) {
312                 printk(KERN_DEBUG "Neponset expansion board not present\n");
313                 return -ENODEV;
314         }
315
316         if (WHOAMI != 0x11) {
317                 printk(KERN_WARNING "Neponset board detected, but "
318                         "wrong ID: %02x\n", WHOAMI);
319                 return -ENODEV;
320         }
321
322         return platform_add_devices(devices, ARRAY_SIZE(devices));
323 }
324
325 subsys_initcall(neponset_init);
326
327 static struct map_desc neponset_io_desc[] __initdata = {
328  /* virtual     physical    length type */
329   { 0xf3000000, 0x10000000, SZ_1M, MT_DEVICE }, /* System Registers */
330   { 0xf4000000, 0x40000000, SZ_1M, MT_DEVICE }  /* SA-1111 */
331 };
332
333 void __init neponset_map_io(void)
334 {
335         iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
336 }