arch/sh64/mach-cayman/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * arch/sh64/mach-cayman/setup.c
   7  *
   8  * SH5 Cayman support
   9  *
  10  * This file handles the architecture-dependent parts of initialization
  11  *
  12  * Copyright David J. Mckay.
  13  * Needs major work!
  14  *
  15  * benedict.gaster@superh.com:   3rd May 2002
  16  *    Added support for ramdisk, removing statically linked romfs at the same time.
  17  *
  18  * lethal@linux-sh.org:          15th May 2003
  19  *    Use the generic procfs cpuinfo interface, just return a valid board name.
  20  */
  21
  22 #include <linux/stddef.h>
  23 #include <linux/init.h>
  24 #include <linux/mm.h>
  25 #include <linux/bootmem.h>
  26 #include <linux/delay.h>
  27 #include <linux/kernel.h>
  28 #include <linux/seq_file.h>
  29 #include <asm/processor.h>
  30 #include <asm/platform.h>
  31 #include <asm/io.h>
  32 #include <asm/irq.h>
  33 #include <asm/page.h>
  34
  35 /*
  36  * Platform Dependent Interrupt Priorities.
  37  */
  38
  39 /* Using defaults defined in irq.h */
  40 #define RES NO_PRIORITY         /* Disabled */
  41 #define IR0 IRL0_PRIORITY       /* IRLs */
  42 #define IR1 IRL1_PRIORITY
  43 #define IR2 IRL2_PRIORITY
  44 #define IR3 IRL3_PRIORITY
  45 #define PCA INTA_PRIORITY       /* PCI Ints */
  46 #define PCB INTB_PRIORITY
  47 #define PCC INTC_PRIORITY
  48 #define PCD INTD_PRIORITY
  49 #define SER TOP_PRIORITY
  50 #define ERR TOP_PRIORITY
  51 #define PW0 TOP_PRIORITY
  52 #define PW1 TOP_PRIORITY
  53 #define PW2 TOP_PRIORITY
  54 #define PW3 TOP_PRIORITY
  55 #define DM0 NO_PRIORITY         /* DMA Ints */
  56 #define DM1 NO_PRIORITY
  57 #define DM2 NO_PRIORITY
  58 #define DM3 NO_PRIORITY
  59 #define DAE NO_PRIORITY
  60 #define TU0 TIMER_PRIORITY      /* TMU Ints */
  61 #define TU1 NO_PRIORITY
  62 #define TU2 NO_PRIORITY
  63 #define TI2 NO_PRIORITY
  64 #define ATI NO_PRIORITY         /* RTC Ints */
  65 #define PRI NO_PRIORITY
  66 #define CUI RTC_PRIORITY
  67 #define ERI SCIF_PRIORITY       /* SCIF Ints */
  68 #define RXI SCIF_PRIORITY
  69 #define BRI SCIF_PRIORITY
  70 #define TXI SCIF_PRIORITY
  71 #define ITI TOP_PRIORITY        /* WDT Ints */
  72
  73 /* Setup for the SMSC FDC37C935 */
  74 #define SMSC_SUPERIO_BASE       0x04000000
  75 #define SMSC_CONFIG_PORT_ADDR   0x3f0
  76 #define SMSC_INDEX_PORT_ADDR    SMSC_CONFIG_PORT_ADDR
  77 #define SMSC_DATA_PORT_ADDR     0x3f1
  78
  79 #define SMSC_ENTER_CONFIG_KEY   0x55
  80 #define SMSC_EXIT_CONFIG_KEY    0xaa
  81
  82 #define SMCS_LOGICAL_DEV_INDEX  0x07
  83 #define SMSC_DEVICE_ID_INDEX    0x20
  84 #define SMSC_DEVICE_REV_INDEX   0x21
  85 #define SMSC_ACTIVATE_INDEX     0x30
  86 #define SMSC_PRIMARY_BASE_INDEX  0x60
  87 #define SMSC_SECONDARY_BASE_INDEX 0x62
  88 #define SMSC_PRIMARY_INT_INDEX  0x70
  89 #define SMSC_SECONDARY_INT_INDEX 0x72
  90
  91 #define SMSC_IDE1_DEVICE        1
  92 #define SMSC_KEYBOARD_DEVICE    7
  93 #define SMSC_CONFIG_REGISTERS   8
  94
  95 #define SMSC_SUPERIO_READ_INDEXED(index) ({ \
  96         outb((index), SMSC_INDEX_PORT_ADDR); \
  97         inb(SMSC_DATA_PORT_ADDR); })
  98 #define SMSC_SUPERIO_WRITE_INDEXED(val, index) ({ \
  99         outb((index), SMSC_INDEX_PORT_ADDR); \
 100         outb((val),   SMSC_DATA_PORT_ADDR); })
 101
 102 #define IDE1_PRIMARY_BASE       0x01f0
 103 #define IDE1_SECONDARY_BASE     0x03f6
 104
 105 unsigned long smsc_superio_virt;
 106
 107 /*
 108  * Platform dependent structures: maps and parms block.
 109  */
 110 struct resource io_resources[] = {
 111         /* To be updated with external devices */
 112 };
 113
 114 struct resource kram_resources[] = {
 115         /* These must be last in the array */
 116         { .name = "Kernel code", .start = 0, .end = 0 },
 117         /* These must be last in the array */
 118         { .name = "Kernel data", .start = 0, .end = 0 }
 119 };
 120
 121 struct resource xram_resources[] = {
 122         /* To be updated with external devices */
 123 };
 124
 125 struct resource rom_resources[] = {
 126         /* To be updated with external devices */
 127 };
 128
 129 struct sh64_platform platform_parms = {
 130         .readonly_rootfs =      1,
 131         .initial_root_dev =     0x0100,
 132         .loader_type =          1,
 133         .io_res_p =             io_resources,
 134         .io_res_count =         ARRAY_SIZE(io_resources),
 135         .kram_res_p =           kram_resources,
 136         .kram_res_count =       ARRAY_SIZE(kram_resources),
 137         .xram_res_p =           xram_resources,
 138         .xram_res_count =       ARRAY_SIZE(xram_resources),
 139         .rom_res_p =            rom_resources,
 140         .rom_res_count =        ARRAY_SIZE(rom_resources),
 141 };
 142
 143 int platform_int_priority[NR_INTC_IRQS] = {
 144         IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ  0- 7 */
 145         RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ  8-15 */
 146         PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */
 147         RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */
 148         TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */
 149         RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */
 150         RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */
 151         RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */
 152 };
 153
 154 static int __init smsc_superio_setup(void)
 155 {
 156         unsigned char devid, devrev;
 157
 158         smsc_superio_virt = onchip_remap(SMSC_SUPERIO_BASE, 1024, "SMSC SuperIO");
 159         if (!smsc_superio_virt) {
 160                 panic("Unable to remap SMSC SuperIO\n");
 161         }
 162
 163         /* Initially the chip is in run state */
 164         /* Put it into configuration state */
 165         outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
 166         outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
 167
 168         /* Read device ID info */
 169         devid = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_ID_INDEX);
 170         devrev = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_REV_INDEX);
 171         printk("SMSC SuperIO devid %02x rev %02x\n", devid, devrev);
 172
 173         /* Select the keyboard device */
 174         SMSC_SUPERIO_WRITE_INDEXED(SMSC_KEYBOARD_DEVICE, SMCS_LOGICAL_DEV_INDEX);
 175
 176         /* enable it */
 177         SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX);
 178
 179         /* Select the interrupts */
 180         /* On a PC keyboard is IRQ1, mouse is IRQ12 */
 181         SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_PRIMARY_INT_INDEX);
 182         SMSC_SUPERIO_WRITE_INDEXED(12, SMSC_SECONDARY_INT_INDEX);
 183
 184 #ifdef CONFIG_IDE
 185         /*
 186          * Only IDE1 exists on the Cayman
 187          */
 188
 189         /* Power it on */
 190         SMSC_SUPERIO_WRITE_INDEXED(1 << SMSC_IDE1_DEVICE, 0x22);
 191
 192         SMSC_SUPERIO_WRITE_INDEXED(SMSC_IDE1_DEVICE, SMCS_LOGICAL_DEV_INDEX);
 193         SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX);
 194
 195         SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE >> 8,
 196                                    SMSC_PRIMARY_BASE_INDEX + 0);
 197         SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE & 0xff,
 198                                    SMSC_PRIMARY_BASE_INDEX + 1);
 199
 200         SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE >> 8,
 201                                    SMSC_SECONDARY_BASE_INDEX + 0);
 202         SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE & 0xff,
 203                                    SMSC_SECONDARY_BASE_INDEX + 1);
 204
 205         SMSC_SUPERIO_WRITE_INDEXED(14, SMSC_PRIMARY_INT_INDEX);
 206
 207         SMSC_SUPERIO_WRITE_INDEXED(SMSC_CONFIG_REGISTERS,
 208                                    SMCS_LOGICAL_DEV_INDEX);
 209
 210         SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc2); /* GP42 = nIDE1_OE */
 211         SMSC_SUPERIO_WRITE_INDEXED(0x01, 0xc5); /* GP45 = IDE1_IRQ */
 212         SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc6); /* GP46 = nIOROP */
 213         SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc7); /* GP47 = nIOWOP */
 214 #endif
 215
 216         /* Exit the configuration state */
 217         outb(SMSC_EXIT_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
 218
 219         return 0;
 220 }
 221
 222 /* This is grotty, but, because kernel is always referenced on the link line
 223  * before any devices, this is safe.
 224  */
 225 __initcall(smsc_superio_setup);
 226
 227 void __init platform_setup(void)
 228 {
 229         /* Cayman platform leaves the decision to head.S, for now */
 230         platform_parms.fpu_flags = fpu_in_use;
 231 }
 232
 233 void __init platform_monitor(void)
 234 {
 235         /* Nothing yet .. */
 236 }
 237
 238 void __init platform_reserve(void)
 239 {
 240         /* Nothing yet .. */
 241 }
 242
 243 const char *get_system_type(void)
 244 {
 245         return "Hitachi Cayman";
 246 }
 247