arch/mips/txx9/rbtx4938/setup.c

   1 /*
   2  * Setup pointers to hardware-dependent routines.
   3  * Copyright (C) 2000-2001 Toshiba Corporation
   4  *
   5  * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
   6  * terms of the GNU General Public License version 2. This program is
   7  * licensed "as is" without any warranty of any kind, whether express
   8  * or implied.
   9  *
  10  * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
  11  */
  12 #include <linux/init.h>
  13 #include <linux/types.h>
  14 #include <linux/ioport.h>
  15 #include <linux/delay.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/gpio/driver.h>
  18 #include <linux/gpio.h>
  19 #include <linux/mtd/physmap.h>
  20
  21 #include <asm/reboot.h>
  22 #include <asm/io.h>
  23 #include <asm/txx9/generic.h>
  24 #include <asm/txx9/pci.h>
  25 #include <asm/txx9/rbtx4938.h>
  26 #include <linux/spi/spi.h>
  27 #include <asm/txx9/spi.h>
  28 #include <asm/txx9pio.h>
  29
  30 static void rbtx4938_machine_restart(char *command)
  31 {
  32         local_irq_disable();
  33         writeb(1, rbtx4938_softresetlock_addr);
  34         writeb(1, rbtx4938_sfvol_addr);
  35         writeb(1, rbtx4938_softreset_addr);
  36         /* fallback */
  37         (*_machine_halt)();
  38 }
  39
  40 static void __init rbtx4938_pci_setup(void)
  41 {
  42 #ifdef CONFIG_PCI
  43         int extarb = !(__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB);
  44         struct pci_controller *c = &txx9_primary_pcic;
  45
  46         register_pci_controller(c);
  47
  48         if (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66)
  49                 txx9_pci_option =
  50                         (txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
  51                         TXX9_PCI_OPT_CLK_66; /* already configured */
  52
  53         /* Reset PCI Bus */
  54         writeb(0, rbtx4938_pcireset_addr);
  55         /* Reset PCIC */
  56         txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
  57         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  58             TXX9_PCI_OPT_CLK_66)
  59                 tx4938_pciclk66_setup();
  60         mdelay(10);
  61         /* clear PCIC reset */
  62         txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
  63         writeb(1, rbtx4938_pcireset_addr);
  64         iob();
  65
  66         tx4938_report_pciclk();
  67         tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
  68         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  69             TXX9_PCI_OPT_CLK_AUTO &&
  70             txx9_pci66_check(c, 0, 0)) {
  71                 /* Reset PCI Bus */
  72                 writeb(0, rbtx4938_pcireset_addr);
  73                 /* Reset PCIC */
  74                 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
  75                 tx4938_pciclk66_setup();
  76                 mdelay(10);
  77                 /* clear PCIC reset */
  78                 txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
  79                 writeb(1, rbtx4938_pcireset_addr);
  80                 iob();
  81                 /* Reinitialize PCIC */
  82                 tx4938_report_pciclk();
  83                 tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
  84         }
  85
  86         if (__raw_readq(&tx4938_ccfgptr->pcfg) &
  87             (TX4938_PCFG_ETH0_SEL|TX4938_PCFG_ETH1_SEL)) {
  88                 /* Reset PCIC1 */
  89                 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
  90                 /* PCI1DMD==0 => PCI1CLK==GBUSCLK/2 => PCI66 */
  91                 if (!(__raw_readq(&tx4938_ccfgptr->ccfg)
  92                       & TX4938_CCFG_PCI1DMD))
  93                         tx4938_ccfg_set(TX4938_CCFG_PCI1_66);
  94                 mdelay(10);
  95                 /* clear PCIC1 reset */
  96                 txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
  97                 tx4938_report_pci1clk();
  98
  99                 /* mem:64K(max), io:64K(max) (enough for ETH0,ETH1) */
 100                 c = txx9_alloc_pci_controller(NULL, 0, 0x10000, 0, 0x10000);
 101                 register_pci_controller(c);
 102                 tx4927_pcic_setup(tx4938_pcic1ptr, c, 0);
 103         }
 104         tx4938_setup_pcierr_irq();
 105 #endif /* CONFIG_PCI */
 106 }
 107
 108 /* SPI support */
 109
 110 /* chip select for SPI devices */
 111 #define SEEPROM1_CS     7       /* PIO7 */
 112 #define SEEPROM2_CS     0       /* IOC */
 113 #define SEEPROM3_CS     1       /* IOC */
 114 #define SRTC_CS 2       /* IOC */
 115 #define SPI_BUSNO       0
 116
 117 static int __init rbtx4938_ethaddr_init(void)
 118 {
 119 #ifdef CONFIG_PCI
 120         unsigned char dat[17];
 121         unsigned char sum;
 122         int i;
 123
 124         /* 0-3: "MAC\0", 4-9:eth0, 10-15:eth1, 16:sum */
 125         if (spi_eeprom_read(SPI_BUSNO, SEEPROM1_CS, 0, dat, sizeof(dat))) {
 126                 pr_err("seeprom: read error.\n");
 127                 return -ENODEV;
 128         } else {
 129                 if (strcmp(dat, "MAC") != 0)
 130                         pr_warn("seeprom: bad signature.\n");
 131                 for (i = 0, sum = 0; i < sizeof(dat); i++)
 132                         sum += dat[i];
 133                 if (sum)
 134                         pr_warn("seeprom: bad checksum.\n");
 135         }
 136         tx4938_ethaddr_init(&dat[4], &dat[4 + 6]);
 137 #endif /* CONFIG_PCI */
 138         return 0;
 139 }
 140
 141 static void __init rbtx4938_spi_setup(void)
 142 {
 143         /* set SPI_SEL */
 144         txx9_set64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_SPI_SEL);
 145 }
 146
 147 static struct resource rbtx4938_fpga_resource;
 148
 149 static void __init rbtx4938_time_init(void)
 150 {
 151         tx4938_time_init(0);
 152 }
 153
 154 static void __init rbtx4938_mem_setup(void)
 155 {
 156         unsigned long long pcfg;
 157
 158         if (txx9_master_clock == 0)
 159                 txx9_master_clock = 25000000; /* 25MHz */
 160
 161         tx4938_setup();
 162
 163 #ifdef CONFIG_PCI
 164         txx9_alloc_pci_controller(&txx9_primary_pcic, 0, 0, 0, 0);
 165         txx9_board_pcibios_setup = tx4927_pcibios_setup;
 166 #else
 167         set_io_port_base(RBTX4938_ETHER_BASE);
 168 #endif
 169
 170         tx4938_sio_init(7372800, 0);
 171
 172 #ifdef CONFIG_TOSHIBA_RBTX4938_MPLEX_PIO58_61
 173         pr_info("PIOSEL: disabling both ATA and NAND selection\n");
 174         txx9_clear64(&tx4938_ccfgptr->pcfg,
 175                      TX4938_PCFG_NDF_SEL | TX4938_PCFG_ATA_SEL);
 176 #endif
 177
 178 #ifdef CONFIG_TOSHIBA_RBTX4938_MPLEX_NAND
 179         pr_info("PIOSEL: enabling NAND selection\n");
 180         txx9_set64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_NDF_SEL);
 181         txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_ATA_SEL);
 182 #endif
 183
 184 #ifdef CONFIG_TOSHIBA_RBTX4938_MPLEX_ATA
 185         pr_info("PIOSEL: enabling ATA selection\n");
 186         txx9_set64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_ATA_SEL);
 187         txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_NDF_SEL);
 188 #endif
 189
 190 #ifdef CONFIG_TOSHIBA_RBTX4938_MPLEX_KEEP
 191         pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
 192         pr_info("PIOSEL: NAND %s, ATA %s\n",
 193                 (pcfg & TX4938_PCFG_NDF_SEL) ? "enabled" : "disabled",
 194                 (pcfg & TX4938_PCFG_ATA_SEL) ? "enabled" : "disabled");
 195 #endif
 196
 197         rbtx4938_spi_setup();
 198         pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);    /* updated */
 199         /* fixup piosel */
 200         if ((pcfg & (TX4938_PCFG_ATA_SEL | TX4938_PCFG_NDF_SEL)) ==
 201             TX4938_PCFG_ATA_SEL)
 202                 writeb((readb(rbtx4938_piosel_addr) & 0x03) | 0x04,
 203                        rbtx4938_piosel_addr);
 204         else if ((pcfg & (TX4938_PCFG_ATA_SEL | TX4938_PCFG_NDF_SEL)) ==
 205                  TX4938_PCFG_NDF_SEL)
 206                 writeb((readb(rbtx4938_piosel_addr) & 0x03) | 0x08,
 207                        rbtx4938_piosel_addr);
 208         else
 209                 writeb(readb(rbtx4938_piosel_addr) & ~(0x08 | 0x04),
 210                        rbtx4938_piosel_addr);
 211
 212         rbtx4938_fpga_resource.name = "FPGA Registers";
 213         rbtx4938_fpga_resource.start = CPHYSADDR(RBTX4938_FPGA_REG_ADDR);
 214         rbtx4938_fpga_resource.end = CPHYSADDR(RBTX4938_FPGA_REG_ADDR) + 0xffff;
 215         rbtx4938_fpga_resource.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 216         if (request_resource(&txx9_ce_res[2], &rbtx4938_fpga_resource))
 217                 pr_err("request resource for fpga failed\n");
 218
 219         _machine_restart = rbtx4938_machine_restart;
 220
 221         writeb(0xff, rbtx4938_led_addr);
 222         pr_info("RBTX4938 --- FPGA(Rev %02x) DIPSW:%02x,%02x\n",
 223                 readb(rbtx4938_fpga_rev_addr),
 224                 readb(rbtx4938_dipsw_addr), readb(rbtx4938_bdipsw_addr));
 225 }
 226
 227 static void __init rbtx4938_ne_init(void)
 228 {
 229         struct resource res[] = {
 230                 {
 231                         .start  = RBTX4938_RTL_8019_BASE,
 232                         .end    = RBTX4938_RTL_8019_BASE + 0x20 - 1,
 233                         .flags  = IORESOURCE_IO,
 234                 }, {
 235                         .start  = RBTX4938_RTL_8019_IRQ,
 236                         .flags  = IORESOURCE_IRQ,
 237                 }
 238         };
 239         platform_device_register_simple("ne", -1, res, ARRAY_SIZE(res));
 240 }
 241
 242 static DEFINE_SPINLOCK(rbtx4938_spi_gpio_lock);
 243
 244 static void rbtx4938_spi_gpio_set(struct gpio_chip *chip, unsigned int offset,
 245                                   int value)
 246 {
 247         u8 val;
 248         unsigned long flags;
 249         spin_lock_irqsave(&rbtx4938_spi_gpio_lock, flags);
 250         val = readb(rbtx4938_spics_addr);
 251         if (value)
 252                 val |= 1 << offset;
 253         else
 254                 val &= ~(1 << offset);
 255         writeb(val, rbtx4938_spics_addr);
 256         mmiowb();
 257         spin_unlock_irqrestore(&rbtx4938_spi_gpio_lock, flags);
 258 }
 259
 260 static int rbtx4938_spi_gpio_dir_out(struct gpio_chip *chip,
 261                                      unsigned int offset, int value)
 262 {
 263         rbtx4938_spi_gpio_set(chip, offset, value);
 264         return 0;
 265 }
 266
 267 static struct gpio_chip rbtx4938_spi_gpio_chip = {
 268         .set = rbtx4938_spi_gpio_set,
 269         .direction_output = rbtx4938_spi_gpio_dir_out,
 270         .label = "RBTX4938-SPICS",
 271         .base = 16,
 272         .ngpio = 3,
 273 };
 274
 275 static int __init rbtx4938_spi_init(void)
 276 {
 277         struct spi_board_info srtc_info = {
 278                 .modalias = "rtc-rs5c348",
 279                 .max_speed_hz = 1000000, /* 1.0Mbps @ Vdd 2.0V */
 280                 .bus_num = 0,
 281                 .chip_select = 16 + SRTC_CS,
 282                 /* Mode 1 (High-Active, Shift-Then-Sample), High Avtive CS  */
 283                 .mode = SPI_MODE_1 | SPI_CS_HIGH,
 284         };
 285         spi_register_board_info(&srtc_info, 1);
 286         spi_eeprom_register(SPI_BUSNO, SEEPROM1_CS, 128);
 287         spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM2_CS, 128);
 288         spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM3_CS, 128);
 289         gpio_request(16 + SRTC_CS, "rtc-rs5c348");
 290         gpio_direction_output(16 + SRTC_CS, 0);
 291         gpio_request(SEEPROM1_CS, "seeprom1");
 292         gpio_direction_output(SEEPROM1_CS, 1);
 293         gpio_request(16 + SEEPROM2_CS, "seeprom2");
 294         gpio_direction_output(16 + SEEPROM2_CS, 1);
 295         gpio_request(16 + SEEPROM3_CS, "seeprom3");
 296         gpio_direction_output(16 + SEEPROM3_CS, 1);
 297         tx4938_spi_init(SPI_BUSNO);
 298         return 0;
 299 }
 300
 301 static void __init rbtx4938_mtd_init(void)
 302 {
 303         struct physmap_flash_data pdata = {
 304                 .width = 4,
 305         };
 306
 307         switch (readb(rbtx4938_bdipsw_addr) & 7) {
 308         case 0:
 309                 /* Boot */
 310                 txx9_physmap_flash_init(0, 0x1fc00000, 0x400000, &pdata);
 311                 /* System */
 312                 txx9_physmap_flash_init(1, 0x1e000000, 0x1000000, &pdata);
 313                 break;
 314         case 1:
 315                 /* System */
 316                 txx9_physmap_flash_init(0, 0x1f000000, 0x1000000, &pdata);
 317                 /* Boot */
 318                 txx9_physmap_flash_init(1, 0x1ec00000, 0x400000, &pdata);
 319                 break;
 320         case 2:
 321                 /* Ext */
 322                 txx9_physmap_flash_init(0, 0x1f000000, 0x1000000, &pdata);
 323                 /* System */
 324                 txx9_physmap_flash_init(1, 0x1e000000, 0x1000000, &pdata);
 325                 /* Boot */
 326                 txx9_physmap_flash_init(2, 0x1dc00000, 0x400000, &pdata);
 327                 break;
 328         case 3:
 329                 /* Boot */
 330                 txx9_physmap_flash_init(1, 0x1bc00000, 0x400000, &pdata);
 331                 /* System */
 332                 txx9_physmap_flash_init(2, 0x1a000000, 0x1000000, &pdata);
 333                 break;
 334         }
 335 }
 336
 337 static void __init rbtx4938_arch_init(void)
 338 {
 339         txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
 340         gpiochip_add_data(&rbtx4938_spi_gpio_chip, NULL);
 341         rbtx4938_pci_setup();
 342         rbtx4938_spi_init();
 343 }
 344
 345 static void __init rbtx4938_device_init(void)
 346 {
 347         rbtx4938_ethaddr_init();
 348         rbtx4938_ne_init();
 349         tx4938_wdt_init();
 350         rbtx4938_mtd_init();
 351         /* TC58DVM82A1FT: tDH=10ns, tWP=tRP=tREADID=35ns */
 352         tx4938_ndfmc_init(10, 35);
 353         tx4938_ata_init(RBTX4938_IRQ_IOC_ATA, 0, 1);
 354         tx4938_dmac_init(0, 2);
 355         tx4938_aclc_init();
 356         platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
 357         tx4938_sramc_init();
 358         txx9_iocled_init(RBTX4938_LED_ADDR - IO_BASE, -1, 8, 1, "green", NULL);
 359 }
 360
 361 struct txx9_board_vec rbtx4938_vec __initdata = {
 362         .system = "Toshiba RBTX4938",
 363         .prom_init = rbtx4938_prom_init,
 364         .mem_setup = rbtx4938_mem_setup,
 365         .irq_setup = rbtx4938_irq_setup,
 366         .time_init = rbtx4938_time_init,
 367         .device_init = rbtx4938_device_init,
 368         .arch_init = rbtx4938_arch_init,
 369 #ifdef CONFIG_PCI
 370         .pci_map_irq = rbtx4938_pci_map_irq,
 371 #endif
 372 };