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.
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.
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.
22 * Copyright 2001 MontaVista Software Inc.
23 * Author: MontaVista Software, Inc.
24 * ahennessy@mvista.com
26 * Copyright (C) 2000-2001 Toshiba Corporation
27 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
30 #include <linux/init.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/ioport.h>
34 #include <linux/delay.h>
36 #include <linux/platform_device.h>
37 #include <linux/clk.h>
38 #include <linux/gpio.h>
39 #ifdef CONFIG_SERIAL_TXX9
40 #include <linux/serial_core.h>
43 #include <asm/txx9tmr.h>
44 #include <asm/txx9pio.h>
45 #include <asm/reboot.h>
46 #include <asm/txx9/pci.h>
47 #include <asm/txx9/jmr3927.h>
48 #include <asm/mipsregs.h>
50 extern void puts(const char *cp);
52 /* don't enable - see errata */
53 static int jmr3927_ccfg_toeon;
55 static inline void do_reset(void)
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 */
62 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
64 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
67 static void jmr3927_machine_restart(char *command)
74 static void jmr3927_machine_halt(void)
76 puts("JMR-TX3927 halted.\n");
80 static void jmr3927_machine_power_off(void)
82 puts("JMR-TX3927 halted. Please turn off the power.\n");
86 void __init plat_time_init(void)
88 txx9_clockevent_init(TX3927_TMR_REG(0),
89 TXX9_IRQ_BASE + JMR3927_IRQ_IRC_TMR(0),
91 txx9_clocksource_init(TX3927_TMR_REG(1), JMR3927_IMCLK);
94 #define DO_WRITE_THROUGH
95 #define DO_ENABLE_CACHE
97 extern char * __init prom_getcmdline(void);
98 static void jmr3927_board_init(void);
100 void __init plat_mem_setup(void)
104 set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);
106 _machine_restart = jmr3927_machine_restart;
107 _machine_halt = jmr3927_machine_halt;
108 pm_power_off = jmr3927_machine_power_off;
113 ioport_resource.start = 0;
114 ioport_resource.end = 0xffffffff;
115 iomem_resource.start = 0;
116 iomem_resource.end = 0xffffffff;
118 /* Reboot on panic */
124 #ifdef DO_ENABLE_CACHE
125 int mips_ic_disable = 0, mips_dc_disable = 0;
127 int mips_ic_disable = 1, mips_dc_disable = 1;
129 #ifdef DO_WRITE_THROUGH
130 int mips_config_cwfon = 0;
131 int mips_config_wbon = 0;
133 int mips_config_cwfon = 1;
134 int mips_config_wbon = 1;
137 conf = read_c0_conf();
138 conf &= ~(TX39_CONF_ICE | TX39_CONF_DCE | TX39_CONF_WBON | TX39_CONF_CWFON);
139 conf |= mips_ic_disable ? 0 : TX39_CONF_ICE;
140 conf |= mips_dc_disable ? 0 : TX39_CONF_DCE;
141 conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
142 conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;
148 /* initialize board */
149 jmr3927_board_init();
151 argptr = prom_getcmdline();
153 if ((argptr = strstr(argptr, "toeon")) != NULL)
154 jmr3927_ccfg_toeon = 1;
155 argptr = prom_getcmdline();
156 if ((argptr = strstr(argptr, "ip=")) == NULL) {
157 argptr = prom_getcmdline();
158 strcat(argptr, " ip=bootp");
161 #ifdef CONFIG_SERIAL_TXX9
163 extern int early_serial_txx9_setup(struct uart_port *port);
165 struct uart_port req;
166 for(i = 0; i < 2; i++) {
167 memset(&req, 0, sizeof(req));
169 req.iotype = UPIO_MEM;
170 req.membase = (unsigned char __iomem *)TX3927_SIO_REG(i);
171 req.mapbase = TX3927_SIO_REG(i);
173 JMR3927_IRQ_IRC_SIO0 : JMR3927_IRQ_IRC_SIO1;
175 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
176 req.uartclk = JMR3927_IMCLK;
177 early_serial_txx9_setup(&req);
180 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
181 argptr = prom_getcmdline();
182 if ((argptr = strstr(argptr, "console=")) == NULL) {
183 argptr = prom_getcmdline();
184 strcat(argptr, " console=ttyS1,115200");
190 static void tx3927_setup(void);
192 static void __init jmr3927_pci_setup(void)
195 int extarb = !(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB);
196 struct pci_controller *c;
198 c = txx9_alloc_pci_controller(&txx9_primary_pcic,
199 JMR3927_PCIMEM, JMR3927_PCIMEM_SIZE,
200 JMR3927_PCIIO, JMR3927_PCIIO_SIZE);
201 register_pci_controller(c);
204 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
206 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
207 JMR3927_IOC_RESET_ADDR);
209 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
211 tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb);
212 #endif /* CONFIG_PCI */
215 static void __init jmr3927_board_init(void)
221 jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);
225 printk("JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
226 jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
227 jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
228 jmr3927_dipsw1(), jmr3927_dipsw2(),
229 jmr3927_dipsw3(), jmr3927_dipsw4());
232 static void __init tx3927_setup(void)
236 /* SDRAMC are configured by PROM */
239 tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
240 tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
241 tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
242 tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;
245 /* enable Timeout BusError */
246 if (jmr3927_ccfg_toeon)
247 tx3927_ccfgptr->ccfg |= TX3927_CCFG_TOE;
249 /* clear BusErrorOnWrite flag */
250 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
251 /* Disable PCI snoop */
252 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
253 /* do reset on watchdog */
254 tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
256 #ifdef DO_WRITE_THROUGH
257 /* Enable PCI SNOOP - with write through only */
258 tx3927_ccfgptr->ccfg |= TX3927_CCFG_PSNP;
262 tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
263 tx3927_ccfgptr->pcfg |=
264 TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
265 (TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));
267 printk("TX3927 -- CRIR:%08lx CCFG:%08lx PCFG:%08lx\n",
268 tx3927_ccfgptr->crir,
269 tx3927_ccfgptr->ccfg, tx3927_ccfgptr->pcfg);
272 for (i = 0; i < TX3927_NR_TMR; i++)
273 txx9_tmr_init(TX3927_TMR_REG(i));
276 tx3927_dmaptr->mcr = 0;
277 for (i = 0; i < ARRAY_SIZE(tx3927_dmaptr->ch); i++) {
279 tx3927_dmaptr->ch[i].ccr = TX3927_DMA_CCR_CHRST;
280 tx3927_dmaptr->ch[i].ccr = 0;
284 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN;
286 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN | TX3927_DMA_MCR_LE;
290 /* PIO[15:12] connected to LEDs */
291 __raw_writel(0x0000f000, &tx3927_pioptr->dir);
292 __raw_writel(0, &tx3927_pioptr->maskcpu);
293 __raw_writel(0, &tx3927_pioptr->maskext);
294 txx9_gpio_init(TX3927_PIO_REG, 0, 16);
295 gpio_request(11, "dipsw1");
296 gpio_request(10, "dipsw2");
300 conf = read_c0_conf();
301 if (!(conf & TX39_CONF_ICE))
302 printk("TX3927 I-Cache disabled.\n");
303 if (!(conf & TX39_CONF_DCE))
304 printk("TX3927 D-Cache disabled.\n");
305 else if (!(conf & TX39_CONF_WBON))
306 printk("TX3927 D-Cache WriteThrough.\n");
307 else if (!(conf & TX39_CONF_CWFON))
308 printk("TX3927 D-Cache WriteBack.\n");
310 printk("TX3927 D-Cache WriteBack (CWF) .\n");
314 /* This trick makes rtc-ds1742 driver usable as is. */
315 unsigned long __swizzle_addr_b(unsigned long port)
317 if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
319 port = (port & 0xffff0000) | (port & 0x7fff << 1);
326 EXPORT_SYMBOL(__swizzle_addr_b);
328 static int __init jmr3927_rtc_init(void)
330 static struct resource __initdata res = {
331 .start = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
332 .end = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
333 .flags = IORESOURCE_MEM,
335 struct platform_device *dev;
336 dev = platform_device_register_simple("rtc-ds1742", -1, &res, 1);
337 return IS_ERR(dev) ? PTR_ERR(dev) : 0;
339 device_initcall(jmr3927_rtc_init);
341 /* Watchdog support */
343 static int __init txx9_wdt_init(unsigned long base)
345 struct resource res = {
347 .end = base + 0x100 - 1,
348 .flags = IORESOURCE_MEM,
350 struct platform_device *dev =
351 platform_device_register_simple("txx9wdt", -1, &res, 1);
352 return IS_ERR(dev) ? PTR_ERR(dev) : 0;
355 static int __init jmr3927_wdt_init(void)
357 return txx9_wdt_init(TX3927_TMR_REG(2));
359 device_initcall(jmr3927_wdt_init);
361 /* Minimum CLK support */
363 struct clk *clk_get(struct device *dev, const char *id)
365 if (!strcmp(id, "imbus_clk"))
366 return (struct clk *)JMR3927_IMCLK;
367 return ERR_PTR(-ENOENT);
369 EXPORT_SYMBOL(clk_get);
371 int clk_enable(struct clk *clk)
375 EXPORT_SYMBOL(clk_enable);
377 void clk_disable(struct clk *clk)
380 EXPORT_SYMBOL(clk_disable);
382 unsigned long clk_get_rate(struct clk *clk)
384 return (unsigned long)clk;
386 EXPORT_SYMBOL(clk_get_rate);
388 void clk_put(struct clk *clk)
391 EXPORT_SYMBOL(clk_put);