arch/mips/txx9/rbtx4927/setup.c

   1 /*
   2  * Toshiba rbtx4927 specific setup
   3  *
   4  * Author: MontaVista Software, Inc.
   5  *         source@mvista.com
   6  *
   7  * Copyright 2001-2002 MontaVista Software Inc.
   8  *
   9  * Copyright (C) 1996, 97, 2001, 04  Ralf Baechle (ralf@linux-mips.org)
  10  * Copyright (C) 2000 RidgeRun, Inc.
  11  * Author: RidgeRun, Inc.
  12  *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
  13  *
  14  * Copyright 2001 MontaVista Software Inc.
  15  * Author: jsun@mvista.com or jsun@junsun.net
  16  *
  17  * Copyright 2002 MontaVista Software Inc.
  18  * Author: Michael Pruznick, michael_pruznick@mvista.com
  19  *
  20  * Copyright (C) 2000-2001 Toshiba Corporation
  21  *
  22  * Copyright (C) 2004 MontaVista Software Inc.
  23  * Author: Manish Lachwani, mlachwani@mvista.com
  24  *
  25  *  This program is free software; you can redistribute it and/or modify it
  26  *  under the terms of the GNU General Public License as published by the
  27  *  Free Software Foundation; either version 2 of the License, or (at your
  28  *  option) any later version.
  29  *
  30  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  31  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  32  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  33  *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  34  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  35  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  36  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  37  *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  38  *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  39  *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  40  *
  41  *  You should have received a copy of the GNU General Public License along
  42  *  with this program; if not, write to the Free Software Foundation, Inc.,
  43  *  675 Mass Ave, Cambridge, MA 02139, USA.
  44  */
  45 #include <linux/init.h>
  46 #include <linux/kernel.h>
  47 #include <linux/types.h>
  48 #include <linux/ioport.h>
  49 #include <linux/platform_device.h>
  50 #include <linux/delay.h>
  51 #include <linux/gpio.h>
  52 #include <linux/leds.h>
  53 #include <asm/io.h>
  54 #include <asm/reboot.h>
  55 #include <asm/txx9/generic.h>
  56 #include <asm/txx9/pci.h>
  57 #include <asm/txx9/rbtx4927.h>
  58 #include <asm/txx9/tx4938.h>    /* for TX4937 */
  59
  60 #ifdef CONFIG_PCI
  61 static void __init tx4927_pci_setup(void)
  62 {
  63         int extarb = !(__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCIARB);
  64         struct pci_controller *c = &txx9_primary_pcic;
  65
  66         register_pci_controller(c);
  67
  68         if (__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCI66)
  69                 txx9_pci_option =
  70                         (txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
  71                         TXX9_PCI_OPT_CLK_66; /* already configured */
  72
  73         /* Reset PCI Bus */
  74         writeb(1, rbtx4927_pcireset_addr);
  75         /* Reset PCIC */
  76         txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  77         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  78             TXX9_PCI_OPT_CLK_66)
  79                 tx4927_pciclk66_setup();
  80         mdelay(10);
  81         /* clear PCIC reset */
  82         txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  83         writeb(0, rbtx4927_pcireset_addr);
  84         iob();
  85
  86         tx4927_report_pciclk();
  87         tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
  88         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  89             TXX9_PCI_OPT_CLK_AUTO &&
  90             txx9_pci66_check(c, 0, 0)) {
  91                 /* Reset PCI Bus */
  92                 writeb(1, rbtx4927_pcireset_addr);
  93                 /* Reset PCIC */
  94                 txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  95                 tx4927_pciclk66_setup();
  96                 mdelay(10);
  97                 /* clear PCIC reset */
  98                 txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  99                 writeb(0, rbtx4927_pcireset_addr);
 100                 iob();
 101                 /* Reinitialize PCIC */
 102                 tx4927_report_pciclk();
 103                 tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
 104         }
 105         tx4927_setup_pcierr_irq();
 106 }
 107
 108 static void __init tx4937_pci_setup(void)
 109 {
 110         int extarb = !(__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB);
 111         struct pci_controller *c = &txx9_primary_pcic;
 112
 113         register_pci_controller(c);
 114
 115         if (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66)
 116                 txx9_pci_option =
 117                         (txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
 118                         TXX9_PCI_OPT_CLK_66; /* already configured */
 119
 120         /* Reset PCI Bus */
 121         writeb(1, rbtx4927_pcireset_addr);
 122         /* Reset PCIC */
 123         txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 124         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
 125             TXX9_PCI_OPT_CLK_66)
 126                 tx4938_pciclk66_setup();
 127         mdelay(10);
 128         /* clear PCIC reset */
 129         txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 130         writeb(0, rbtx4927_pcireset_addr);
 131         iob();
 132
 133         tx4938_report_pciclk();
 134         tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
 135         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
 136             TXX9_PCI_OPT_CLK_AUTO &&
 137             txx9_pci66_check(c, 0, 0)) {
 138                 /* Reset PCI Bus */
 139                 writeb(1, rbtx4927_pcireset_addr);
 140                 /* Reset PCIC */
 141                 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 142                 tx4938_pciclk66_setup();
 143                 mdelay(10);
 144                 /* clear PCIC reset */
 145                 txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 146                 writeb(0, rbtx4927_pcireset_addr);
 147                 iob();
 148                 /* Reinitialize PCIC */
 149                 tx4938_report_pciclk();
 150                 tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
 151         }
 152         tx4938_setup_pcierr_irq();
 153 }
 154
 155 static void __init rbtx4927_arch_init(void)
 156 {
 157         tx4927_pci_setup();
 158 }
 159
 160 static void __init rbtx4937_arch_init(void)
 161 {
 162         tx4937_pci_setup();
 163 }
 164 #else
 165 #define rbtx4927_arch_init NULL
 166 #define rbtx4937_arch_init NULL
 167 #endif /* CONFIG_PCI */
 168
 169 static void toshiba_rbtx4927_restart(char *command)
 170 {
 171         /* enable the s/w reset register */
 172         writeb(1, rbtx4927_softresetlock_addr);
 173
 174         /* wait for enable to be seen */
 175         while (!(readb(rbtx4927_softresetlock_addr) & 1))
 176                 ;
 177
 178         /* do a s/w reset */
 179         writeb(1, rbtx4927_softreset_addr);
 180
 181         /* fallback */
 182         (*_machine_halt)();
 183 }
 184
 185 static void __init rbtx4927_clock_init(void);
 186 static void __init rbtx4937_clock_init(void);
 187
 188 static void __init rbtx4927_mem_setup(void)
 189 {
 190         char *argptr;
 191
 192         if (TX4927_REV_PCODE() == 0x4927) {
 193                 rbtx4927_clock_init();
 194                 tx4927_setup();
 195         } else {
 196                 rbtx4937_clock_init();
 197                 tx4938_setup();
 198         }
 199
 200         _machine_restart = toshiba_rbtx4927_restart;
 201
 202 #ifdef CONFIG_PCI
 203         txx9_alloc_pci_controller(&txx9_primary_pcic,
 204                                   RBTX4927_PCIMEM, RBTX4927_PCIMEM_SIZE,
 205                                   RBTX4927_PCIIO, RBTX4927_PCIIO_SIZE);
 206         txx9_board_pcibios_setup = tx4927_pcibios_setup;
 207 #else
 208         set_io_port_base(KSEG1 + RBTX4927_ISA_IO_OFFSET);
 209 #endif
 210
 211         /* TX4927-SIO DTR on (PIO[15]) */
 212         gpio_request(15, "sio-dtr");
 213         gpio_direction_output(15, 1);
 214
 215         tx4927_sio_init(0, 0);
 216 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
 217         argptr = prom_getcmdline();
 218         if (!strstr(argptr, "console="))
 219                 strcat(argptr, " console=ttyS0,38400");
 220 #endif
 221 }
 222
 223 static void __init rbtx4927_clock_init(void)
 224 {
 225         /*
 226          * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
 227          *
 228          * For TX4927:
 229          * PCIDIVMODE[12:11]'s initial value is given by S9[4:3] (ON:0, OFF:1).
 230          * CPU 166MHz: PCI 66MHz : PCIDIVMODE: 00 (1/2.5)
 231          * CPU 200MHz: PCI 66MHz : PCIDIVMODE: 01 (1/3)
 232          * CPU 166MHz: PCI 33MHz : PCIDIVMODE: 10 (1/5)
 233          * CPU 200MHz: PCI 33MHz : PCIDIVMODE: 11 (1/6)
 234          * i.e. S9[3]: ON (83MHz), OFF (100MHz)
 235          */
 236         switch ((unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg) &
 237                 TX4927_CCFG_PCIDIVMODE_MASK) {
 238         case TX4927_CCFG_PCIDIVMODE_2_5:
 239         case TX4927_CCFG_PCIDIVMODE_5:
 240                 txx9_cpu_clock = 166666666;     /* 166MHz */
 241                 break;
 242         default:
 243                 txx9_cpu_clock = 200000000;     /* 200MHz */
 244         }
 245 }
 246
 247 static void __init rbtx4937_clock_init(void)
 248 {
 249         /*
 250          * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
 251          *
 252          * For TX4937:
 253          * PCIDIVMODE[12:11]'s initial value is given by S1[5:4] (ON:0, OFF:1)
 254          * PCIDIVMODE[10] is 0.
 255          * CPU 266MHz: PCI 33MHz : PCIDIVMODE: 000 (1/8)
 256          * CPU 266MHz: PCI 66MHz : PCIDIVMODE: 001 (1/4)
 257          * CPU 300MHz: PCI 33MHz : PCIDIVMODE: 010 (1/9)
 258          * CPU 300MHz: PCI 66MHz : PCIDIVMODE: 011 (1/4.5)
 259          * CPU 333MHz: PCI 33MHz : PCIDIVMODE: 100 (1/10)
 260          * CPU 333MHz: PCI 66MHz : PCIDIVMODE: 101 (1/5)
 261          */
 262         switch ((unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg) &
 263                 TX4938_CCFG_PCIDIVMODE_MASK) {
 264         case TX4938_CCFG_PCIDIVMODE_8:
 265         case TX4938_CCFG_PCIDIVMODE_4:
 266                 txx9_cpu_clock = 266666666;     /* 266MHz */
 267                 break;
 268         case TX4938_CCFG_PCIDIVMODE_9:
 269         case TX4938_CCFG_PCIDIVMODE_4_5:
 270                 txx9_cpu_clock = 300000000;     /* 300MHz */
 271                 break;
 272         default:
 273                 txx9_cpu_clock = 333333333;     /* 333MHz */
 274         }
 275 }
 276
 277 static void __init rbtx4927_time_init(void)
 278 {
 279         tx4927_time_init(0);
 280 }
 281
 282 static void __init toshiba_rbtx4927_rtc_init(void)
 283 {
 284         struct resource res = {
 285                 .start  = RBTX4927_BRAMRTC_BASE - IO_BASE,
 286                 .end    = RBTX4927_BRAMRTC_BASE - IO_BASE + 0x800 - 1,
 287                 .flags  = IORESOURCE_MEM,
 288         };
 289         platform_device_register_simple("rtc-ds1742", -1, &res, 1);
 290 }
 291
 292 static void __init rbtx4927_ne_init(void)
 293 {
 294         struct resource res[] = {
 295                 {
 296                         .start  = RBTX4927_RTL_8019_BASE,
 297                         .end    = RBTX4927_RTL_8019_BASE + 0x20 - 1,
 298                         .flags  = IORESOURCE_IO,
 299                 }, {
 300                         .start  = RBTX4927_RTL_8019_IRQ,
 301                         .flags  = IORESOURCE_IRQ,
 302                 }
 303         };
 304         platform_device_register_simple("ne", -1, res, ARRAY_SIZE(res));
 305 }
 306
 307 static void __init rbtx4927_mtd_init(void)
 308 {
 309         int i;
 310
 311         for (i = 0; i < 2; i++)
 312                 tx4927_mtd_init(i);
 313 }
 314
 315 static void __init rbtx4927_gpioled_init(void)
 316 {
 317         static struct gpio_led leds[] = {
 318                 { .name = "gpioled:green:0", .gpio = 0, .active_low = 1, },
 319                 { .name = "gpioled:green:1", .gpio = 1, .active_low = 1, },
 320         };
 321         static struct gpio_led_platform_data pdata = {
 322                 .num_leds = ARRAY_SIZE(leds),
 323                 .leds = leds,
 324         };
 325         struct platform_device *pdev = platform_device_alloc("leds-gpio", 0);
 326
 327         if (!pdev)
 328                 return;
 329         pdev->dev.platform_data = &pdata;
 330         if (platform_device_add(pdev))
 331                 platform_device_put(pdev);
 332 }
 333
 334 static void __init rbtx4927_device_init(void)
 335 {
 336         toshiba_rbtx4927_rtc_init();
 337         rbtx4927_ne_init();
 338         tx4927_wdt_init();
 339         rbtx4927_mtd_init();
 340         if (TX4927_REV_PCODE() == 0x4927) {
 341                 tx4927_dmac_init(2);
 342                 tx4927_aclc_init(0, 1);
 343         } else {
 344                 tx4938_dmac_init(0, 2);
 345                 tx4938_aclc_init();
 346         }
 347         platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
 348         txx9_iocled_init(RBTX4927_LED_ADDR - IO_BASE, -1, 3, 1, "green", NULL);
 349         rbtx4927_gpioled_init();
 350 }
 351
 352 struct txx9_board_vec rbtx4927_vec __initdata = {
 353         .system = "Toshiba RBTX4927",
 354         .prom_init = rbtx4927_prom_init,
 355         .mem_setup = rbtx4927_mem_setup,
 356         .irq_setup = rbtx4927_irq_setup,
 357         .time_init = rbtx4927_time_init,
 358         .device_init = rbtx4927_device_init,
 359         .arch_init = rbtx4927_arch_init,
 360 #ifdef CONFIG_PCI
 361         .pci_map_irq = rbtx4927_pci_map_irq,
 362 #endif
 363 };
 364 struct txx9_board_vec rbtx4937_vec __initdata = {
 365         .system = "Toshiba RBTX4937",
 366         .prom_init = rbtx4927_prom_init,
 367         .mem_setup = rbtx4927_mem_setup,
 368         .irq_setup = rbtx4927_irq_setup,
 369         .time_init = rbtx4927_time_init,
 370         .device_init = rbtx4927_device_init,
 371         .arch_init = rbtx4937_arch_init,
 372 #ifdef CONFIG_PCI
 373         .pci_map_irq = rbtx4927_pci_map_irq,
 374 #endif
 375 };