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[MIPS] jmr3927: use generic txx9 gpio
[linux-2.6/verdex.git] / arch / mips / jmr3927 / rbhma3100 / setup.c
blobf39c444e42d4156ceabcdf10a30a26e3cf4d3fb8
1 /*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License as published by the
4 * Free Software Foundation; either version 2 of the License, or (at your
5 * option) any later version.
6 *
7 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
8 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
10 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
11 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
12 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
13 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
14 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
15 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
16 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * Copyright 2001 MontaVista Software Inc.
23 * Author: MontaVista Software, Inc.
24 * ahennessy@mvista.com
25 *
26 * Copyright (C) 2000-2001 Toshiba Corporation
27 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
28 */
29
30 #include <linux/init.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/ioport.h>
35 #include <linux/delay.h>
36 #include <linux/pm.h>
37 #include <linux/platform_device.h>
38 #include <linux/clk.h>
39 #include <linux/gpio.h>
40 #ifdef CONFIG_SERIAL_TXX9
41 #include <linux/serial_core.h>
42 #endif
43
44 #include <asm/txx9tmr.h>
45 #include <asm/txx9pio.h>
46 #include <asm/reboot.h>
47 #include <asm/jmr3927/jmr3927.h>
48 #include <asm/mipsregs.h>
49
50 extern void puts(const char *cp);
51
52 /* don't enable - see errata */
53 static int jmr3927_ccfg_toeon;
54
55 static inline void do_reset(void)
56 {
57 #if 1 /* Resetting PCI bus */
58 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
59 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
60 (void)jmr3927_ioc_reg_in(JMR3927_IOC_RESET_ADDR); /* flush WB */
61 mdelay(1);
62 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
63 #endif
64 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
65 }
66
67 static void jmr3927_machine_restart(char *command)
68 {
69 local_irq_disable();
70 puts("Rebooting...");
71 do_reset();
72 }
73
74 static void jmr3927_machine_halt(void)
75 {
76 puts("JMR-TX3927 halted.\n");
77 while (1);
78 }
79
80 static void jmr3927_machine_power_off(void)
81 {
82 puts("JMR-TX3927 halted. Please turn off the power.\n");
83 while (1);
84 }
85
86 void __init plat_time_init(void)
87 {
88 txx9_clockevent_init(TX3927_TMR_REG(0),
89 TXX9_IRQ_BASE + JMR3927_IRQ_IRC_TMR(0),
90 JMR3927_IMCLK);
91 txx9_clocksource_init(TX3927_TMR_REG(1), JMR3927_IMCLK);
92 }
93
94 #define DO_WRITE_THROUGH
95 #define DO_ENABLE_CACHE
96
97 extern char * __init prom_getcmdline(void);
98 static void jmr3927_board_init(void);
99 extern struct resource pci_io_resource;
100 extern struct resource pci_mem_resource;
101
102 void __init plat_mem_setup(void)
103 {
104 char *argptr;
105
106 set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);
107
108 _machine_restart = jmr3927_machine_restart;
109 _machine_halt = jmr3927_machine_halt;
110 pm_power_off = jmr3927_machine_power_off;
111
112 /*
113 * IO/MEM resources.
114 */
115 ioport_resource.start = pci_io_resource.start;
116 ioport_resource.end = pci_io_resource.end;
117 iomem_resource.start = 0;
118 iomem_resource.end = 0xffffffff;
119
120 /* Reboot on panic */
121 panic_timeout = 180;
122
123 /* cache setup */
124 {
125 unsigned int conf;
126 #ifdef DO_ENABLE_CACHE
127 int mips_ic_disable = 0, mips_dc_disable = 0;
128 #else
129 int mips_ic_disable = 1, mips_dc_disable = 1;
130 #endif
131 #ifdef DO_WRITE_THROUGH
132 int mips_config_cwfon = 0;
133 int mips_config_wbon = 0;
134 #else
135 int mips_config_cwfon = 1;
136 int mips_config_wbon = 1;
137 #endif
138
139 conf = read_c0_conf();
140 conf &= ~(TX39_CONF_ICE | TX39_CONF_DCE | TX39_CONF_WBON | TX39_CONF_CWFON);
141 conf |= mips_ic_disable ? 0 : TX39_CONF_ICE;
142 conf |= mips_dc_disable ? 0 : TX39_CONF_DCE;
143 conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
144 conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;
145
146 write_c0_conf(conf);
147 write_c0_cache(0);
148 }
149
150 /* initialize board */
151 jmr3927_board_init();
152
153 argptr = prom_getcmdline();
154
155 if ((argptr = strstr(argptr, "toeon")) != NULL)
156 jmr3927_ccfg_toeon = 1;
157 argptr = prom_getcmdline();
158 if ((argptr = strstr(argptr, "ip=")) == NULL) {
159 argptr = prom_getcmdline();
160 strcat(argptr, " ip=bootp");
161 }
162
163 #ifdef CONFIG_SERIAL_TXX9
164 {
165 extern int early_serial_txx9_setup(struct uart_port *port);
166 int i;
167 struct uart_port req;
168 for(i = 0; i < 2; i++) {
169 memset(&req, 0, sizeof(req));
170 req.line = i;
171 req.iotype = UPIO_MEM;
172 req.membase = (unsigned char __iomem *)TX3927_SIO_REG(i);
173 req.mapbase = TX3927_SIO_REG(i);
174 req.irq = i == 0 ?
175 JMR3927_IRQ_IRC_SIO0 : JMR3927_IRQ_IRC_SIO1;
176 if (i == 0)
177 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
178 req.uartclk = JMR3927_IMCLK;
179 early_serial_txx9_setup(&req);
180 }
181 }
182 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
183 argptr = prom_getcmdline();
184 if ((argptr = strstr(argptr, "console=")) == NULL) {
185 argptr = prom_getcmdline();
186 strcat(argptr, " console=ttyS1,115200");
187 }
188 #endif
189 #endif
190 }
191
192 static void tx3927_setup(void);
193
194 static void __init jmr3927_board_init(void)
195 {
196 tx3927_setup();
197
198 /* SIO0 DTR on */
199 jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);
200
201 jmr3927_led_set(0);
202
203 printk("JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
204 jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
205 jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
206 jmr3927_dipsw1(), jmr3927_dipsw2(),
207 jmr3927_dipsw3(), jmr3927_dipsw4());
208 }
209
210 static void __init tx3927_setup(void)
211 {
212 int i;
213 #ifdef CONFIG_PCI
214 unsigned long mips_pci_io_base = JMR3927_PCIIO;
215 unsigned long mips_pci_io_size = JMR3927_PCIIO_SIZE;
216 unsigned long mips_pci_mem_base = JMR3927_PCIMEM;
217 unsigned long mips_pci_mem_size = JMR3927_PCIMEM_SIZE;
218 /* for legacy I/O, PCI I/O PCI Bus address must be 0 */
219 unsigned long mips_pci_io_pciaddr = 0;
220 #endif
221
222 /* SDRAMC are configured by PROM */
223
224 /* ROMC */
225 tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
226 tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
227 tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
228 tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;
229
230 /* CCFG */
231 /* enable Timeout BusError */
232 if (jmr3927_ccfg_toeon)
233 tx3927_ccfgptr->ccfg |= TX3927_CCFG_TOE;
234
235 /* clear BusErrorOnWrite flag */
236 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
237 /* Disable PCI snoop */
238 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
239 /* do reset on watchdog */
240 tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
241
242 #ifdef DO_WRITE_THROUGH
243 /* Enable PCI SNOOP - with write through only */
244 tx3927_ccfgptr->ccfg |= TX3927_CCFG_PSNP;
245 #endif
246
247 /* Pin selection */
248 tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
249 tx3927_ccfgptr->pcfg |=
250 TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
251 (TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));
252
253 printk("TX3927 -- CRIR:%08lx CCFG:%08lx PCFG:%08lx\n",
254 tx3927_ccfgptr->crir,
255 tx3927_ccfgptr->ccfg, tx3927_ccfgptr->pcfg);
256
257 /* TMR */
258 for (i = 0; i < TX3927_NR_TMR; i++)
259 txx9_tmr_init(TX3927_TMR_REG(i));
260
261 /* DMA */
262 tx3927_dmaptr->mcr = 0;
263 for (i = 0; i < ARRAY_SIZE(tx3927_dmaptr->ch); i++) {
264 /* reset channel */
265 tx3927_dmaptr->ch[i].ccr = TX3927_DMA_CCR_CHRST;
266 tx3927_dmaptr->ch[i].ccr = 0;
267 }
268 /* enable DMA */
269 #ifdef __BIG_ENDIAN
270 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN;
271 #else
272 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN | TX3927_DMA_MCR_LE;
273 #endif
274
275 #ifdef CONFIG_PCI
276 /* PCIC */
277 printk("TX3927 PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:",
278 tx3927_pcicptr->did, tx3927_pcicptr->vid,
279 tx3927_pcicptr->rid);
280 if (!(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB)) {
281 printk("External\n");
282 /* XXX */
283 } else {
284 printk("Internal\n");
285
286 /* Reset PCI Bus */
287 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
288 udelay(100);
289 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
290 JMR3927_IOC_RESET_ADDR);
291 udelay(100);
292 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
293
294
295 /* Disable External PCI Config. Access */
296 tx3927_pcicptr->lbc = TX3927_PCIC_LBC_EPCAD;
297 #ifdef __BIG_ENDIAN
298 tx3927_pcicptr->lbc |= TX3927_PCIC_LBC_IBSE |
299 TX3927_PCIC_LBC_TIBSE |
300 TX3927_PCIC_LBC_TMFBSE | TX3927_PCIC_LBC_MSDSE;
301 #endif
302 /* LB->PCI mappings */
303 tx3927_pcicptr->iomas = ~(mips_pci_io_size - 1);
304 tx3927_pcicptr->ilbioma = mips_pci_io_base;
305 tx3927_pcicptr->ipbioma = mips_pci_io_pciaddr;
306 tx3927_pcicptr->mmas = ~(mips_pci_mem_size - 1);
307 tx3927_pcicptr->ilbmma = mips_pci_mem_base;
308 tx3927_pcicptr->ipbmma = mips_pci_mem_base;
309 /* PCI->LB mappings */
310 tx3927_pcicptr->iobas = 0xffffffff;
311 tx3927_pcicptr->ioba = 0;
312 tx3927_pcicptr->tlbioma = 0;
313 tx3927_pcicptr->mbas = ~(mips_pci_mem_size - 1);
314 tx3927_pcicptr->mba = 0;
315 tx3927_pcicptr->tlbmma = 0;
316 /* Enable Direct mapping Address Space Decoder */
317 tx3927_pcicptr->lbc |= TX3927_PCIC_LBC_ILMDE | TX3927_PCIC_LBC_ILIDE;
318
319 /* Clear All Local Bus Status */
320 tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL;
321 /* Enable All Local Bus Interrupts */
322 tx3927_pcicptr->lbim = TX3927_PCIC_LBIM_ALL;
323 /* Clear All PCI Status Error */
324 tx3927_pcicptr->pcistat = TX3927_PCIC_PCISTATIM_ALL;
325 /* Enable All PCI Status Error Interrupts */
326 tx3927_pcicptr->pcistatim = TX3927_PCIC_PCISTATIM_ALL;
327
328 /* PCIC Int => IRC IRQ10 */
329 tx3927_pcicptr->il = TX3927_IR_PCI;
330 /* Target Control (per errata) */
331 tx3927_pcicptr->tc = TX3927_PCIC_TC_OF8E | TX3927_PCIC_TC_IF8E;
332
333 /* Enable Bus Arbiter */
334 tx3927_pcicptr->pbapmc = TX3927_PCIC_PBAPMC_PBAEN;
335
336 tx3927_pcicptr->pcicmd = PCI_COMMAND_MASTER |
337 PCI_COMMAND_MEMORY |
338 PCI_COMMAND_IO |
339 PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
340 }
341 #endif /* CONFIG_PCI */
342
343 /* PIO */
344 /* PIO[15:12] connected to LEDs */
345 __raw_writel(0x0000f000, &tx3927_pioptr->dir);
346 __raw_writel(0, &tx3927_pioptr->maskcpu);
347 __raw_writel(0, &tx3927_pioptr->maskext);
348 txx9_gpio_init(TX3927_PIO_REG, 0, 16);
349 gpio_request(11, "dipsw1");
350 gpio_request(10, "dipsw2");
351 {
352 unsigned int conf;
353
354 conf = read_c0_conf();
355 if (!(conf & TX39_CONF_ICE))
356 printk("TX3927 I-Cache disabled.\n");
357 if (!(conf & TX39_CONF_DCE))
358 printk("TX3927 D-Cache disabled.\n");
359 else if (!(conf & TX39_CONF_WBON))
360 printk("TX3927 D-Cache WriteThrough.\n");
361 else if (!(conf & TX39_CONF_CWFON))
362 printk("TX3927 D-Cache WriteBack.\n");
363 else
364 printk("TX3927 D-Cache WriteBack (CWF) .\n");
365 }
366 }
367
368 /* This trick makes rtc-ds1742 driver usable as is. */
369 unsigned long __swizzle_addr_b(unsigned long port)
370 {
371 if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
372 return port;
373 port = (port & 0xffff0000) | (port & 0x7fff << 1);
374 #ifdef __BIG_ENDIAN
375 return port;
376 #else
377 return port | 1;
378 #endif
379 }
380 EXPORT_SYMBOL(__swizzle_addr_b);
381
382 static int __init jmr3927_rtc_init(void)
383 {
384 static struct resource __initdata res = {
385 .start = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
386 .end = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
387 .flags = IORESOURCE_MEM,
388 };
389 struct platform_device *dev;
390 dev = platform_device_register_simple("rtc-ds1742", -1, &res, 1);
391 return IS_ERR(dev) ? PTR_ERR(dev) : 0;
392 }
393 device_initcall(jmr3927_rtc_init);
394
395 /* Watchdog support */
396
397 static int __init txx9_wdt_init(unsigned long base)
398 {
399 struct resource res = {
400 .start = base,
401 .end = base + 0x100 - 1,
402 .flags = IORESOURCE_MEM,
403 };
404 struct platform_device *dev =
405 platform_device_register_simple("txx9wdt", -1, &res, 1);
406 return IS_ERR(dev) ? PTR_ERR(dev) : 0;
407 }
408
409 static int __init jmr3927_wdt_init(void)
410 {
411 return txx9_wdt_init(TX3927_TMR_REG(2));
412 }
413 device_initcall(jmr3927_wdt_init);
414
415 /* Minimum CLK support */
416
417 struct clk *clk_get(struct device *dev, const char *id)
418 {
419 if (!strcmp(id, "imbus_clk"))
420 return (struct clk *)JMR3927_IMCLK;
421 return ERR_PTR(-ENOENT);
422 }
423 EXPORT_SYMBOL(clk_get);
424
425 int clk_enable(struct clk *clk)
426 {
427 return 0;
428 }
429 EXPORT_SYMBOL(clk_enable);
430
431 void clk_disable(struct clk *clk)
432 {
433 }
434 EXPORT_SYMBOL(clk_disable);
435
436 unsigned long clk_get_rate(struct clk *clk)
437 {
438 return (unsigned long)clk;
439 }
440 EXPORT_SYMBOL(clk_get_rate);
441
442 void clk_put(struct clk *clk)
443 {
444 }
445 EXPORT_SYMBOL(clk_put);
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