~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/arm/mach-sa1100/neponset.c

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.11 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.84 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.154 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.201 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.201 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.77 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 12 #include <mach/hardware.h>
 13 #include <asm/mach-types.h>
 14 #include <asm/irq.h>
 15 #include <asm/mach/map.h>
 16 #include <asm/mach/irq.h>
 17 #include <asm/mach/serial_sa1100.h>
 18 #include <mach/assabet.h>
 19 #include <mach/neponset.h>
 20 #include <asm/hardware/sa1111.h>
 21 #include <asm/sizes.h>
 22 
 23 /*
 24  * Install handler for Neponset IRQ.  Note that we have to loop here
 25  * since the ETHERNET and USAR IRQs are level based, and we need to
 26  * ensure that the IRQ signal is deasserted before returning.  This
 27  * is rather unfortunate.
 28  */
 29 static void
 30 neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
 31 {
 32         unsigned int irr;
 33 
 34         while (1) {
 35                 /*
 36                  * Acknowledge the parent IRQ.
 37                  */
 38                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 39 
 40                 /*
 41                  * Read the interrupt reason register.  Let's have all
 42                  * active IRQ bits high.  Note: there is a typo in the
 43                  * Neponset user's guide for the SA1111 IRR level.
 44                  */
 45                 irr = IRR ^ (IRR_ETHERNET | IRR_USAR);
 46 
 47                 if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
 48                         break;
 49 
 50                 /*
 51                  * Since there is no individual mask, we have to
 52                  * mask the parent IRQ.  This is safe, since we'll
 53                  * recheck the register for any pending IRQs.
 54                  */
 55                 if (irr & (IRR_ETHERNET | IRR_USAR)) {
 56                         desc->irq_data.chip->irq_mask(&desc->irq_data);
 57 
 58                         /*
 59                          * Ack the interrupt now to prevent re-entering
 60                          * this neponset handler.  Again, this is safe
 61                          * since we'll check the IRR register prior to
 62                          * leaving.
 63                          */
 64                         desc->irq_data.chip->irq_ack(&desc->irq_data);
 65 
 66                         if (irr & IRR_ETHERNET) {
 67                                 generic_handle_irq(IRQ_NEPONSET_SMC9196);
 68                         }
 69 
 70                         if (irr & IRR_USAR) {
 71                                 generic_handle_irq(IRQ_NEPONSET_USAR);
 72                         }
 73 
 74                         desc->irq_data.chip->irq_unmask(&desc->irq_data);
 75                 }
 76 
 77                 if (irr & IRR_SA1111) {
 78                         generic_handle_irq(IRQ_NEPONSET_SA1111);
 79                 }
 80         }
 81 }
 82 
 83 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
 84 {
 85         u_int mdm_ctl0 = MDM_CTL_0;
 86 
 87         if (port->mapbase == _Ser1UTCR0) {
 88                 if (mctrl & TIOCM_RTS)
 89                         mdm_ctl0 &= ~MDM_CTL0_RTS2;
 90                 else
 91                         mdm_ctl0 |= MDM_CTL0_RTS2;
 92 
 93                 if (mctrl & TIOCM_DTR)
 94                         mdm_ctl0 &= ~MDM_CTL0_DTR2;
 95                 else
 96                         mdm_ctl0 |= MDM_CTL0_DTR2;
 97         } else if (port->mapbase == _Ser3UTCR0) {
 98                 if (mctrl & TIOCM_RTS)
 99                         mdm_ctl0 &= ~MDM_CTL0_RTS1;
100                 else
101                         mdm_ctl0 |= MDM_CTL0_RTS1;
102 
103                 if (mctrl & TIOCM_DTR)
104                         mdm_ctl0 &= ~MDM_CTL0_DTR1;
105                 else
106                         mdm_ctl0 |= MDM_CTL0_DTR1;
107         }
108 
109         MDM_CTL_0 = mdm_ctl0;
110 }
111 
112 static u_int neponset_get_mctrl(struct uart_port *port)
113 {
114         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
115         u_int mdm_ctl1 = MDM_CTL_1;
116 
117         if (port->mapbase == _Ser1UTCR0) {
118                 if (mdm_ctl1 & MDM_CTL1_DCD2)
119                         ret &= ~TIOCM_CD;
120                 if (mdm_ctl1 & MDM_CTL1_CTS2)
121                         ret &= ~TIOCM_CTS;
122                 if (mdm_ctl1 & MDM_CTL1_DSR2)
123                         ret &= ~TIOCM_DSR;
124         } else if (port->mapbase == _Ser3UTCR0) {
125                 if (mdm_ctl1 & MDM_CTL1_DCD1)
126                         ret &= ~TIOCM_CD;
127                 if (mdm_ctl1 & MDM_CTL1_CTS1)
128                         ret &= ~TIOCM_CTS;
129                 if (mdm_ctl1 & MDM_CTL1_DSR1)
130                         ret &= ~TIOCM_DSR;
131         }
132 
133         return ret;
134 }
135 
136 static struct sa1100_port_fns neponset_port_fns __devinitdata = {
137         .set_mctrl      = neponset_set_mctrl,
138         .get_mctrl      = neponset_get_mctrl,
139 };
140 
141 static int __devinit neponset_probe(struct platform_device *dev)
142 {
143         sa1100_register_uart_fns(&neponset_port_fns);
144 
145         /*
146          * Install handler for GPIO25.
147          */
148         irq_set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING);
149         irq_set_chained_handler(IRQ_GPIO25, neponset_irq_handler);
150 
151         /*
152          * We would set IRQ_GPIO25 to be a wake-up IRQ, but
153          * unfortunately something on the Neponset activates
154          * this IRQ on sleep (ethernet?)
155          */
156 #if 0
157         enable_irq_wake(IRQ_GPIO25);
158 #endif
159 
160         /*
161          * Setup other Neponset IRQs.  SA1111 will be done by the
162          * generic SA1111 code.
163          */
164         irq_set_handler(IRQ_NEPONSET_SMC9196, handle_simple_irq);
165         set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
166         irq_set_handler(IRQ_NEPONSET_USAR, handle_simple_irq);
167         set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
168 
169         /*
170          * Disable GPIO 0/1 drivers so the buttons work on the module.
171          */
172         NCR_0 = NCR_GP01_OFF;
173 
174         return 0;
175 }
176 
177 #ifdef CONFIG_PM
178 
179 /*
180  * LDM power management.
181  */
182 static unsigned int neponset_saved_state;
183 
184 static int neponset_suspend(struct platform_device *dev, pm_message_t state)
185 {
186         /*
187          * Save state.
188          */
189         neponset_saved_state = NCR_0;
190 
191         return 0;
192 }
193 
194 static int neponset_resume(struct platform_device *dev)
195 {
196         NCR_0 = neponset_saved_state;
197 
198         return 0;
199 }
200 
201 #else
202 #define neponset_suspend NULL
203 #define neponset_resume  NULL
204 #endif
205 
206 static struct platform_driver neponset_device_driver = {
207         .probe          = neponset_probe,
208         .suspend        = neponset_suspend,
209         .resume         = neponset_resume,
210         .driver         = {
211                 .name   = "neponset",
212         },
213 };
214 
215 static struct resource neponset_resources[] = {
216         [0] = {
217                 .start  = 0x10000000,
218                 .end    = 0x17ffffff,
219                 .flags  = IORESOURCE_MEM,
220         },
221 };
222 
223 static struct platform_device neponset_device = {
224         .name           = "neponset",
225         .id             = 0,
226         .num_resources  = ARRAY_SIZE(neponset_resources),
227         .resource       = neponset_resources,
228 };
229 
230 static struct resource sa1111_resources[] = {
231         [0] = {
232                 .start  = 0x40000000,
233                 .end    = 0x40001fff,
234                 .flags  = IORESOURCE_MEM,
235         },
236         [1] = {
237                 .start  = IRQ_NEPONSET_SA1111,
238                 .end    = IRQ_NEPONSET_SA1111,
239                 .flags  = IORESOURCE_IRQ,
240         },
241 };
242 
243 static struct sa1111_platform_data sa1111_info = {
244         .irq_base       = IRQ_BOARD_END,
245 };
246 
247 static u64 sa1111_dmamask = 0xffffffffUL;
248 
249 static struct platform_device sa1111_device = {
250         .name           = "sa1111",
251         .id             = 0,
252         .dev            = {
253                 .dma_mask = &sa1111_dmamask,
254                 .coherent_dma_mask = 0xffffffff,
255                 .platform_data = &sa1111_info,
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 extern void sa1110_mb_disable(void);
295 
296 static int __init neponset_init(void)
297 {
298         platform_driver_register(&neponset_device_driver);
299 
300         /*
301          * The Neponset is only present on the Assabet machine type.
302          */
303         if (!machine_is_assabet())
304                 return -ENODEV;
305 
306         /*
307          * Ensure that the memory bus request/grant signals are setup,
308          * and the grant is held in its inactive state, whether or not
309          * we actually have a Neponset attached.
310          */
311         sa1110_mb_disable();
312 
313         if (!machine_has_neponset()) {
314                 printk(KERN_DEBUG "Neponset expansion board not present\n");
315                 return -ENODEV;
316         }
317 
318         if (WHOAMI != 0x11) {
319                 printk(KERN_WARNING "Neponset board detected, but "
320                         "wrong ID: %02x\n", WHOAMI);
321                 return -ENODEV;
322         }
323 
324         return platform_add_devices(devices, ARRAY_SIZE(devices));
325 }
326 
327 subsys_initcall(neponset_init);
328 
329 static struct map_desc neponset_io_desc[] __initdata = {
330         {       /* System Registers */
331                 .virtual        =  0xf3000000,
332                 .pfn            = __phys_to_pfn(0x10000000),
333                 .length         = SZ_1M,
334                 .type           = MT_DEVICE
335         }, {    /* SA-1111 */
336                 .virtual        =  0xf4000000,
337                 .pfn            = __phys_to_pfn(0x40000000),
338                 .length         = SZ_1M,
339                 .type           = MT_DEVICE
340         }
341 };
342 
343 void __init neponset_map_io(void)
344 {
345         iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
346 }
347 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp