ARM: 5910/1: ARM: Add tmp register for addruart and loadsp
[linux-3.10.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/tty.h>
8 #include <linux/ioport.h>
9 #include <linux/serial_core.h>
10 #include <linux/platform_device.h>
11 #include <linux/slab.h>
12
13 #include <mach/hardware.h>
14 #include <asm/mach-types.h>
15 #include <asm/irq.h>
16 #include <asm/mach/map.h>
17 #include <asm/mach/irq.h>
18 #include <asm/mach/serial_sa1100.h>
19 #include <mach/assabet.h>
20 #include <mach/neponset.h>
21 #include <asm/hardware/sa1111.h>
22 #include <asm/sizes.h>
23
24 /*
25  * Install handler for Neponset IRQ.  Note that we have to loop here
26  * since the ETHERNET and USAR IRQs are level based, and we need to
27  * ensure that the IRQ signal is deasserted before returning.  This
28  * is rather unfortunate.
29  */
30 static void
31 neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
32 {
33         unsigned int irr;
34
35         while (1) {
36                 /*
37                  * Acknowledge the parent IRQ.
38                  */
39                 desc->chip->ack(irq);
40
41                 /*
42                  * Read the interrupt reason register.  Let's have all
43                  * active IRQ bits high.  Note: there is a typo in the
44                  * Neponset user's guide for the SA1111 IRR level.
45                  */
46                 irr = IRR ^ (IRR_ETHERNET | IRR_USAR);
47
48                 if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
49                         break;
50
51                 /*
52                  * Since there is no individual mask, we have to
53                  * mask the parent IRQ.  This is safe, since we'll
54                  * recheck the register for any pending IRQs.
55                  */
56                 if (irr & (IRR_ETHERNET | IRR_USAR)) {
57                         desc->chip->mask(irq);
58
59                         /*
60                          * Ack the interrupt now to prevent re-entering
61                          * this neponset handler.  Again, this is safe
62                          * since we'll check the IRR register prior to
63                          * leaving.
64                          */
65                         desc->chip->ack(irq);
66
67                         if (irr & IRR_ETHERNET) {
68                                 generic_handle_irq(IRQ_NEPONSET_SMC9196);
69                         }
70
71                         if (irr & IRR_USAR) {
72                                 generic_handle_irq(IRQ_NEPONSET_USAR);
73                         }
74
75                         desc->chip->unmask(irq);
76                 }
77
78                 if (irr & IRR_SA1111) {
79                         generic_handle_irq(IRQ_NEPONSET_SA1111);
80                 }
81         }
82 }
83
84 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
85 {
86         u_int mdm_ctl0 = MDM_CTL_0;
87
88         if (port->mapbase == _Ser1UTCR0) {
89                 if (mctrl & TIOCM_RTS)
90                         mdm_ctl0 &= ~MDM_CTL0_RTS2;
91                 else
92                         mdm_ctl0 |= MDM_CTL0_RTS2;
93
94                 if (mctrl & TIOCM_DTR)
95                         mdm_ctl0 &= ~MDM_CTL0_DTR2;
96                 else
97                         mdm_ctl0 |= MDM_CTL0_DTR2;
98         } else if (port->mapbase == _Ser3UTCR0) {
99                 if (mctrl & TIOCM_RTS)
100                         mdm_ctl0 &= ~MDM_CTL0_RTS1;
101                 else
102                         mdm_ctl0 |= MDM_CTL0_RTS1;
103
104                 if (mctrl & TIOCM_DTR)
105                         mdm_ctl0 &= ~MDM_CTL0_DTR1;
106                 else
107                         mdm_ctl0 |= MDM_CTL0_DTR1;
108         }
109
110         MDM_CTL_0 = mdm_ctl0;
111 }
112
113 static u_int neponset_get_mctrl(struct uart_port *port)
114 {
115         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
116         u_int mdm_ctl1 = MDM_CTL_1;
117
118         if (port->mapbase == _Ser1UTCR0) {
119                 if (mdm_ctl1 & MDM_CTL1_DCD2)
120                         ret &= ~TIOCM_CD;
121                 if (mdm_ctl1 & MDM_CTL1_CTS2)
122                         ret &= ~TIOCM_CTS;
123                 if (mdm_ctl1 & MDM_CTL1_DSR2)
124                         ret &= ~TIOCM_DSR;
125         } else if (port->mapbase == _Ser3UTCR0) {
126                 if (mdm_ctl1 & MDM_CTL1_DCD1)
127                         ret &= ~TIOCM_CD;
128                 if (mdm_ctl1 & MDM_CTL1_CTS1)
129                         ret &= ~TIOCM_CTS;
130                 if (mdm_ctl1 & MDM_CTL1_DSR1)
131                         ret &= ~TIOCM_DSR;
132         }
133
134         return ret;
135 }
136
137 static struct sa1100_port_fns neponset_port_fns __devinitdata = {
138         .set_mctrl      = neponset_set_mctrl,
139         .get_mctrl      = neponset_get_mctrl,
140 };
141
142 static int __devinit neponset_probe(struct platform_device *dev)
143 {
144         sa1100_register_uart_fns(&neponset_port_fns);
145
146         /*
147          * Install handler for GPIO25.
148          */
149         set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING);
150         set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler);
151
152         /*
153          * We would set IRQ_GPIO25 to be a wake-up IRQ, but
154          * unfortunately something on the Neponset activates
155          * this IRQ on sleep (ethernet?)
156          */
157 #if 0
158         enable_irq_wake(IRQ_GPIO25);
159 #endif
160
161         /*
162          * Setup other Neponset IRQs.  SA1111 will be done by the
163          * generic SA1111 code.
164          */
165         set_irq_handler(IRQ_NEPONSET_SMC9196, handle_simple_irq);
166         set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
167         set_irq_handler(IRQ_NEPONSET_USAR, handle_simple_irq);
168         set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
169
170         /*
171          * Disable GPIO 0/1 drivers so the buttons work on the module.
172          */
173         NCR_0 = NCR_GP01_OFF;
174
175         return 0;
176 }
177
178 #ifdef CONFIG_PM
179
180 /*
181  * LDM power management.
182  */
183 static unsigned int neponset_saved_state;
184
185 static int neponset_suspend(struct platform_device *dev, pm_message_t state)
186 {
187         /*
188          * Save state.
189          */
190         neponset_saved_state = NCR_0;
191
192         return 0;
193 }
194
195 static int neponset_resume(struct platform_device *dev)
196 {
197         NCR_0 = neponset_saved_state;
198
199         return 0;
200 }
201
202 #else
203 #define neponset_suspend NULL
204 #define neponset_resume  NULL
205 #endif
206
207 static struct platform_driver neponset_device_driver = {
208         .probe          = neponset_probe,
209         .suspend        = neponset_suspend,
210         .resume         = neponset_resume,
211         .driver         = {
212                 .name   = "neponset",
213         },
214 };
215
216 static struct resource neponset_resources[] = {
217         [0] = {
218                 .start  = 0x10000000,
219                 .end    = 0x17ffffff,
220                 .flags  = IORESOURCE_MEM,
221         },
222 };
223
224 static struct platform_device neponset_device = {
225         .name           = "neponset",
226         .id             = 0,
227         .num_resources  = ARRAY_SIZE(neponset_resources),
228         .resource       = neponset_resources,
229 };
230
231 static struct resource sa1111_resources[] = {
232         [0] = {
233                 .start  = 0x40000000,
234                 .end    = 0x40001fff,
235                 .flags  = IORESOURCE_MEM,
236         },
237         [1] = {
238                 .start  = IRQ_NEPONSET_SA1111,
239                 .end    = IRQ_NEPONSET_SA1111,
240                 .flags  = IORESOURCE_IRQ,
241         },
242 };
243
244 static u64 sa1111_dmamask = 0xffffffffUL;
245
246 static struct platform_device sa1111_device = {
247         .name           = "sa1111",
248         .id             = 0,
249         .dev            = {
250                 .dma_mask = &sa1111_dmamask,
251                 .coherent_dma_mask = 0xffffffff,
252         },
253         .num_resources  = ARRAY_SIZE(sa1111_resources),
254         .resource       = sa1111_resources,
255 };
256
257 static struct resource smc91x_resources[] = {
258         [0] = {
259                 .name   = "smc91x-regs",
260                 .start  = SA1100_CS3_PHYS,
261                 .end    = SA1100_CS3_PHYS + 0x01ffffff,
262                 .flags  = IORESOURCE_MEM,
263         },
264         [1] = {
265                 .start  = IRQ_NEPONSET_SMC9196,
266                 .end    = IRQ_NEPONSET_SMC9196,
267                 .flags  = IORESOURCE_IRQ,
268         },
269         [2] = {
270                 .name   = "smc91x-attrib",
271                 .start  = SA1100_CS3_PHYS + 0x02000000,
272                 .end    = SA1100_CS3_PHYS + 0x03ffffff,
273                 .flags  = IORESOURCE_MEM,
274         },
275 };
276
277 static struct platform_device smc91x_device = {
278         .name           = "smc91x",
279         .id             = 0,
280         .num_resources  = ARRAY_SIZE(smc91x_resources),
281         .resource       = smc91x_resources,
282 };
283
284 static struct platform_device *devices[] __initdata = {
285         &neponset_device,
286         &sa1111_device,
287         &smc91x_device,
288 };
289
290 extern void sa1110_mb_disable(void);
291
292 static int __init neponset_init(void)
293 {
294         platform_driver_register(&neponset_device_driver);
295
296         /*
297          * The Neponset is only present on the Assabet machine type.
298          */
299         if (!machine_is_assabet())
300                 return -ENODEV;
301
302         /*
303          * Ensure that the memory bus request/grant signals are setup,
304          * and the grant is held in its inactive state, whether or not
305          * we actually have a Neponset attached.
306          */
307         sa1110_mb_disable();
308
309         if (!machine_has_neponset()) {
310                 printk(KERN_DEBUG "Neponset expansion board not present\n");
311                 return -ENODEV;
312         }
313
314         if (WHOAMI != 0x11) {
315                 printk(KERN_WARNING "Neponset board detected, but "
316                         "wrong ID: %02x\n", WHOAMI);
317                 return -ENODEV;
318         }
319
320         return platform_add_devices(devices, ARRAY_SIZE(devices));
321 }
322
323 subsys_initcall(neponset_init);
324
325 static struct map_desc neponset_io_desc[] __initdata = {
326         {       /* System Registers */
327                 .virtual        =  0xf3000000,
328                 .pfn            = __phys_to_pfn(0x10000000),
329                 .length         = SZ_1M,
330                 .type           = MT_DEVICE
331         }, {    /* SA-1111 */
332                 .virtual        =  0xf4000000,
333                 .pfn            = __phys_to_pfn(0x40000000),
334                 .length         = SZ_1M,
335                 .type           = MT_DEVICE
336         }
337 };
338
339 void __init neponset_map_io(void)
340 {
341         iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
342 }