release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/txx9/jmr3927/setup.c

   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/ioport.h>
  34 #include <linux/delay.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/gpio.h>
  37 #include <asm/reboot.h>
  38 #include <asm/txx9pio.h>
  39 #include <asm/txx9/generic.h>
  40 #include <asm/txx9/pci.h>
  41 #include <asm/txx9/jmr3927.h>
  42 #include <asm/mipsregs.h>
  43
  44 static void jmr3927_machine_restart(char *command)
  45 {
  46         local_irq_disable();
  47         jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
  48         jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
  49         (void)jmr3927_ioc_reg_in(JMR3927_IOC_RESET_ADDR);       /* flush WB */
  50         mdelay(1);
  51         jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
  52         jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
  53         /* fallback */
  54         (*_machine_halt)();
  55 }
  56
  57 static void __init jmr3927_time_init(void)
  58 {
  59         tx3927_time_init(0, 1);
  60 }
  61
  62 #define DO_WRITE_THROUGH
  63
  64 static void jmr3927_board_init(void);
  65
  66 static void __init jmr3927_mem_setup(void)
  67 {
  68         set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);
  69
  70         _machine_restart = jmr3927_machine_restart;
  71
  72         /* cache setup */
  73         {
  74                 unsigned int conf;
  75 #ifdef DO_WRITE_THROUGH
  76                 int mips_config_cwfon = 0;
  77                 int mips_config_wbon = 0;
  78 #else
  79                 int mips_config_cwfon = 1;
  80                 int mips_config_wbon = 1;
  81 #endif
  82
  83                 conf = read_c0_conf();
  84                 conf &= ~(TX39_CONF_WBON | TX39_CONF_CWFON);
  85                 conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
  86                 conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;
  87
  88                 write_c0_conf(conf);
  89                 write_c0_cache(0);
  90         }
  91
  92         /* initialize board */
  93         jmr3927_board_init();
  94
  95         tx3927_sio_init(0, 1 << 1); /* ch1: noCTS */
  96 }
  97
  98 static void __init jmr3927_pci_setup(void)
  99 {
 100 #ifdef CONFIG_PCI
 101         int extarb = !(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB);
 102         struct pci_controller *c;
 103
 104         c = txx9_alloc_pci_controller(&txx9_primary_pcic,
 105                                       JMR3927_PCIMEM, JMR3927_PCIMEM_SIZE,
 106                                       JMR3927_PCIIO, JMR3927_PCIIO_SIZE);
 107         register_pci_controller(c);
 108         if (!extarb) {
 109                 /* Reset PCI Bus */
 110                 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
 111                 udelay(100);
 112                 jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
 113                                     JMR3927_IOC_RESET_ADDR);
 114                 udelay(100);
 115                 jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
 116         }
 117         tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb);
 118         tx3927_setup_pcierr_irq();
 119 #endif /* CONFIG_PCI */
 120 }
 121
 122 static void __init jmr3927_board_init(void)
 123 {
 124         txx9_cpu_clock = JMR3927_CORECLK;
 125         /* SDRAMC are configured by PROM */
 126
 127         /* ROMC */
 128         tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
 129         tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
 130         tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
 131         tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;
 132
 133         /* Pin selection */
 134         tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
 135         tx3927_ccfgptr->pcfg |=
 136                 TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
 137                 (TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));
 138
 139         tx3927_setup();
 140
 141         /* PIO[15:12] connected to LEDs */
 142         __raw_writel(0x0000f000, &tx3927_pioptr->dir);
 143         gpio_request(11, "dipsw1");
 144         gpio_request(10, "dipsw2");
 145
 146         jmr3927_pci_setup();
 147
 148         /* SIO0 DTR on */
 149         jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);
 150
 151         jmr3927_led_set(0);
 152
 153         printk(KERN_INFO
 154                "JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
 155                jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
 156                jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
 157                jmr3927_dipsw1(), jmr3927_dipsw2(),
 158                jmr3927_dipsw3(), jmr3927_dipsw4());
 159 }
 160
 161 /* This trick makes rtc-ds1742 driver usable as is. */
 162 static unsigned long jmr3927_swizzle_addr_b(unsigned long port)
 163 {
 164         if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
 165                 return port;
 166         port = (port & 0xffff0000) | (port & 0x7fff << 1);
 167 #ifdef __BIG_ENDIAN
 168         return port;
 169 #else
 170         return port | 1;
 171 #endif
 172 }
 173
 174 static void __init jmr3927_rtc_init(void)
 175 {
 176         static struct resource __initdata res = {
 177                 .start  = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
 178                 .end    = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
 179                 .flags  = IORESOURCE_MEM,
 180         };
 181         platform_device_register_simple("rtc-ds1742", -1, &res, 1);
 182 }
 183
 184 static void __init jmr3927_mtd_init(void)
 185 {
 186         int i;
 187
 188         for (i = 0; i < 2; i++)
 189                 tx3927_mtd_init(i);
 190 }
 191
 192 static void __init jmr3927_device_init(void)
 193 {
 194         unsigned long iocled_base = JMR3927_IOC_LED_ADDR - IO_BASE;
 195 #ifdef __LITTLE_ENDIAN
 196         iocled_base |= 1;
 197 #endif
 198         __swizzle_addr_b = jmr3927_swizzle_addr_b;
 199         jmr3927_rtc_init();
 200         tx3927_wdt_init();
 201         jmr3927_mtd_init();
 202         txx9_iocled_init(iocled_base, -1, 8, 1, "green", NULL);
 203 }
 204
 205 struct txx9_board_vec jmr3927_vec __initdata = {
 206         .system = "Toshiba JMR_TX3927",
 207         .prom_init = jmr3927_prom_init,
 208         .mem_setup = jmr3927_mem_setup,
 209         .irq_setup = jmr3927_irq_setup,
 210         .time_init = jmr3927_time_init,
 211         .device_init = jmr3927_device_init,
 212 #ifdef CONFIG_PCI
 213         .pci_map_irq = jmr3927_pci_map_irq,
 214 #endif
 215 };