arch/sh/boards/se/7751/setup.c

   1 /*
   2  * linux/arch/sh/kernel/setup_7751se.c
   3  *
   4  * Copyright (C) 2000  Kazumoto Kojima
   5  *
   6  * Hitachi SolutionEngine Support.
   7  *
   8  * Modified for 7751 Solution Engine by
   9  * Ian da Silva and Jeremy Siegel, 2001.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/init.h>
  14 #include <linux/irq.h>
  15
  16 #include <linux/hdreg.h>
  17 #include <linux/ide.h>
  18 #include <asm/io.h>
  19 #include <asm/se7751/se7751.h>
  20
  21 #ifdef CONFIG_SH_KGDB
  22 #include <asm/kgdb.h>
  23 #endif
  24
  25 /*
  26  * Configure the Super I/O chip
  27  */
  28 #if 0
  29 /* Leftover code from regular Solution Engine, for reference. */
  30 /* The SH7751 Solution Engine has a different SuperIO. */
  31 static void __init smsc_config(int index, int data)
  32 {
  33         outb_p(index, INDEX_PORT);
  34         outb_p(data, DATA_PORT);
  35 }
  36
  37 static void __init init_smsc(void)
  38 {
  39         outb_p(CONFIG_ENTER, CONFIG_PORT);
  40         outb_p(CONFIG_ENTER, CONFIG_PORT);
  41
  42         /* FDC */
  43         smsc_config(CURRENT_LDN_INDEX, LDN_FDC);
  44         smsc_config(ACTIVATE_INDEX, 0x01);
  45         smsc_config(IRQ_SELECT_INDEX, 6); /* IRQ6 */
  46
  47         /* IDE1 */
  48         smsc_config(CURRENT_LDN_INDEX, LDN_IDE1);
  49         smsc_config(ACTIVATE_INDEX, 0x01);
  50         smsc_config(IRQ_SELECT_INDEX, 14); /* IRQ14 */
  51
  52         /* AUXIO (GPIO): to use IDE1 */
  53         smsc_config(CURRENT_LDN_INDEX, LDN_AUXIO);
  54         smsc_config(GPIO46_INDEX, 0x00); /* nIOROP */
  55         smsc_config(GPIO47_INDEX, 0x00); /* nIOWOP */
  56
  57         /* COM1 */
  58         smsc_config(CURRENT_LDN_INDEX, LDN_COM1);
  59         smsc_config(ACTIVATE_INDEX, 0x01);
  60         smsc_config(IO_BASE_HI_INDEX, 0x03);
  61         smsc_config(IO_BASE_LO_INDEX, 0xf8);
  62         smsc_config(IRQ_SELECT_INDEX, 4); /* IRQ4 */
  63
  64         /* COM2 */
  65         smsc_config(CURRENT_LDN_INDEX, LDN_COM2);
  66         smsc_config(ACTIVATE_INDEX, 0x01);
  67         smsc_config(IO_BASE_HI_INDEX, 0x02);
  68         smsc_config(IO_BASE_LO_INDEX, 0xf8);
  69         smsc_config(IRQ_SELECT_INDEX, 3); /* IRQ3 */
  70
  71         /* RTC */
  72         smsc_config(CURRENT_LDN_INDEX, LDN_RTC);
  73         smsc_config(ACTIVATE_INDEX, 0x01);
  74         smsc_config(IRQ_SELECT_INDEX, 8); /* IRQ8 */
  75
  76         /* XXX: PARPORT, KBD, and MOUSE will come here... */
  77         outb_p(CONFIG_EXIT, CONFIG_PORT);
  78 }
  79 #endif
  80
  81 const char *get_system_type(void)
  82 {
  83         return "7751 SolutionEngine";
  84 }
  85
  86 #ifdef CONFIG_SH_KGDB
  87 static int kgdb_uart_setup(void);
  88 static struct kgdb_sermap kgdb_uart_sermap =
  89 { "ttyS", 0, kgdb_uart_setup, NULL };
  90 #endif
  91
  92 /*
  93  * Initialize the board
  94  */
  95 void __init platform_setup(void)
  96 {
  97         /* Call init_smsc() replacement to set up SuperIO. */
  98         /* XXX: RTC setting comes here */
  99 #ifdef CONFIG_SH_KGDB
 100         kgdb_register_sermap(&kgdb_uart_sermap);
 101 #endif
 102 }
 103
 104 /*********************************************************************
 105  * Currently a hack (e.g. does not interact well w/serial.c, lots of *
 106  * hardcoded stuff) but may be useful if SCI/F needs debugging.      *
 107  * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and  *
 108  * arch/i386/lib/kgdb_serial.c).                                     *
 109  *********************************************************************/
 110
 111 #ifdef CONFIG_SH_KGDB
 112 #include <linux/types.h>
 113 #include <linux/serial.h>
 114 #include <linux/serialP.h>
 115 #include <linux/serial_reg.h>
 116
 117 #define COM1_PORT 0x3f8  /* Base I/O address */
 118 #define COM1_IRQ  4      /* IRQ not used yet */
 119 #define COM2_PORT 0x2f8  /* Base I/O address */
 120 #define COM2_IRQ  3      /* IRQ not used yet */
 121
 122 #define SB_CLOCK 1843200 /* Serial baud clock */
 123 #define SB_BASE (SB_CLOCK/16)
 124 #define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
 125
 126 struct uart_port {
 127         int base;
 128 };
 129 #define UART_NPORTS 2
 130 struct uart_port uart_ports[] = {
 131         { COM1_PORT },
 132         { COM2_PORT },
 133 };
 134 struct uart_port *kgdb_uart_port;
 135
 136 #define UART_IN(reg)    inb_p(kgdb_uart_port->base + reg)
 137 #define UART_OUT(reg,v) outb_p((v), kgdb_uart_port->base + reg)
 138
 139 /* Basic read/write functions for the UART */
 140 #define UART_LSR_RXCERR    (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
 141 static int kgdb_uart_getchar(void)
 142 {
 143         int lsr;
 144         int c = -1;
 145
 146         while (c == -1) {
 147                 lsr = UART_IN(UART_LSR);
 148                 if (lsr & UART_LSR_DR)
 149                         c = UART_IN(UART_RX);
 150                 if ((lsr & UART_LSR_RXCERR))
 151                         c = -1;
 152         }
 153         return c;
 154 }
 155
 156 static void kgdb_uart_putchar(int c)
 157 {
 158         while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
 159                 ;
 160         UART_OUT(UART_TX, c);
 161 }
 162
 163 /*
 164  * Initialize UART to configured/requested values.
 165  * (But we don't interrupts yet, or interact w/serial.c)
 166  */
 167 static int kgdb_uart_setup(void)
 168 {
 169         int port;
 170         int lcr = 0;
 171         int bdiv = 0;
 172
 173         if (kgdb_portnum >= UART_NPORTS) {
 174                 KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
 175                 return -1;
 176         }
 177
 178         kgdb_uart_port = &uart_ports[kgdb_portnum];
 179
 180         /* Init sequence from gdb_hook_interrupt */
 181         UART_IN(UART_RX);
 182         UART_OUT(UART_IER, 0);
 183
 184         UART_IN(UART_RX);       /* Serial driver comments say */
 185         UART_IN(UART_IIR);      /* this clears interrupt regs */
 186         UART_IN(UART_MSR);
 187
 188         /* Figure basic LCR values */
 189         switch (kgdb_bits) {
 190         case '7':
 191                 lcr |= UART_LCR_WLEN7;
 192                 break;
 193         default: case '8':
 194                 lcr |= UART_LCR_WLEN8;
 195                 break;
 196         }
 197         switch (kgdb_parity) {
 198         case 'O':
 199                 lcr |= UART_LCR_PARITY;
 200                 break;
 201         case 'E':
 202                 lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
 203                 break;
 204         default: break;
 205         }
 206
 207         /* Figure the baud rate divisor */
 208         bdiv = (SB_BASE/kgdb_baud);
 209
 210         /* Set the baud rate and LCR values */
 211         UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
 212         UART_OUT(UART_DLL, (bdiv & 0xff));
 213         UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
 214         UART_OUT(UART_LCR, lcr);
 215
 216         /* Set the MCR */
 217         UART_OUT(UART_MCR, SB_MCR);
 218
 219         /* Turn off FIFOs for now */
 220         UART_OUT(UART_FCR, 0);
 221
 222         /* Setup complete: initialize function pointers */
 223         kgdb_getchar = kgdb_uart_getchar;
 224         kgdb_putchar = kgdb_uart_putchar;
 225
 226         return 0;
 227 }
 228 #endif /* CONFIG_SH_KGDB */