diff options
Diffstat (limited to 'arch/sh/boards/se/7751/setup.c')
| -rw-r--r-- | arch/sh/boards/se/7751/setup.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/arch/sh/boards/se/7751/setup.c b/arch/sh/boards/se/7751/setup.c new file mode 100644 index 00000000000..9d111bb884f --- /dev/null +++ b/arch/sh/boards/se/7751/setup.c @@ -0,0 +1,228 @@ +/* + * linux/arch/sh/kernel/setup_7751se.c + * + * Copyright (C) 2000 Kazumoto Kojima + * + * Hitachi SolutionEngine Support. + * + * Modified for 7751 Solution Engine by + * Ian da Silva and Jeremy Siegel, 2001. + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/irq.h> + +#include <linux/hdreg.h> +#include <linux/ide.h> +#include <asm/io.h> +#include <asm/se7751/se7751.h> + +#ifdef CONFIG_SH_KGDB +#include <asm/kgdb.h> +#endif + +/* + * Configure the Super I/O chip + */ +#if 0 +/* Leftover code from regular Solution Engine, for reference. */ +/* The SH7751 Solution Engine has a different SuperIO. */ +static void __init smsc_config(int index, int data) +{ + outb_p(index, INDEX_PORT); + outb_p(data, DATA_PORT); +} + +static void __init init_smsc(void) +{ + outb_p(CONFIG_ENTER, CONFIG_PORT); + outb_p(CONFIG_ENTER, CONFIG_PORT); + + /* FDC */ + smsc_config(CURRENT_LDN_INDEX, LDN_FDC); + smsc_config(ACTIVATE_INDEX, 0x01); + smsc_config(IRQ_SELECT_INDEX, 6); /* IRQ6 */ + + /* IDE1 */ + smsc_config(CURRENT_LDN_INDEX, LDN_IDE1); + smsc_config(ACTIVATE_INDEX, 0x01); + smsc_config(IRQ_SELECT_INDEX, 14); /* IRQ14 */ + + /* AUXIO (GPIO): to use IDE1 */ + smsc_config(CURRENT_LDN_INDEX, LDN_AUXIO); + smsc_config(GPIO46_INDEX, 0x00); /* nIOROP */ + smsc_config(GPIO47_INDEX, 0x00); /* nIOWOP */ + + /* COM1 */ + smsc_config(CURRENT_LDN_INDEX, LDN_COM1); + smsc_config(ACTIVATE_INDEX, 0x01); + smsc_config(IO_BASE_HI_INDEX, 0x03); + smsc_config(IO_BASE_LO_INDEX, 0xf8); + smsc_config(IRQ_SELECT_INDEX, 4); /* IRQ4 */ + + /* COM2 */ + smsc_config(CURRENT_LDN_INDEX, LDN_COM2); + smsc_config(ACTIVATE_INDEX, 0x01); + smsc_config(IO_BASE_HI_INDEX, 0x02); + smsc_config(IO_BASE_LO_INDEX, 0xf8); + smsc_config(IRQ_SELECT_INDEX, 3); /* IRQ3 */ + + /* RTC */ + smsc_config(CURRENT_LDN_INDEX, LDN_RTC); + smsc_config(ACTIVATE_INDEX, 0x01); + smsc_config(IRQ_SELECT_INDEX, 8); /* IRQ8 */ + + /* XXX: PARPORT, KBD, and MOUSE will come here... */ + outb_p(CONFIG_EXIT, CONFIG_PORT); +} +#endif + +const char *get_system_type(void) +{ + return "7751 SolutionEngine"; +} + +#ifdef CONFIG_SH_KGDB +static int kgdb_uart_setup(void); +static struct kgdb_sermap kgdb_uart_sermap = +{ "ttyS", 0, kgdb_uart_setup, NULL }; +#endif + +/* + * Initialize the board + */ +void __init platform_setup(void) +{ + /* Call init_smsc() replacement to set up SuperIO. */ + /* XXX: RTC setting comes here */ +#ifdef CONFIG_SH_KGDB + kgdb_register_sermap(&kgdb_uart_sermap); +#endif +} + +/********************************************************************* + * Currently a hack (e.g. does not interact well w/serial.c, lots of * + * hardcoded stuff) but may be useful if SCI/F needs debugging. * + * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and * + * arch/i386/lib/kgdb_serial.c). * + *********************************************************************/ + +#ifdef CONFIG_SH_KGDB +#include <linux/types.h> +#include <linux/serial.h> +#include <linux/serialP.h> +#include <linux/serial_reg.h> + +#define COM1_PORT 0x3f8 /* Base I/O address */ +#define COM1_IRQ 4 /* IRQ not used yet */ +#define COM2_PORT 0x2f8 /* Base I/O address */ +#define COM2_IRQ 3 /* IRQ not used yet */ + +#define SB_CLOCK 1843200 /* Serial baud clock */ +#define SB_BASE (SB_CLOCK/16) +#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS + +struct uart_port { + int base; +}; +#define UART_NPORTS 2 +struct uart_port uart_ports[] = { + { COM1_PORT }, + { COM2_PORT }, +}; +struct uart_port *kgdb_uart_port; + +#define UART_IN(reg) inb_p(kgdb_uart_port->base + reg) +#define UART_OUT(reg,v) outb_p((v), kgdb_uart_port->base + reg) + +/* Basic read/write functions for the UART */ +#define UART_LSR_RXCERR (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE) +static int kgdb_uart_getchar(void) +{ + int lsr; + int c = -1; + + while (c == -1) { + lsr = UART_IN(UART_LSR); + if (lsr & UART_LSR_DR) + c = UART_IN(UART_RX); + if ((lsr & UART_LSR_RXCERR)) + c = -1; + } + return c; +} + +static void kgdb_uart_putchar(int c) +{ + while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0) + ; + UART_OUT(UART_TX, c); +} + +/* + * Initialize UART to configured/requested values. + * (But we don't interrupts yet, or interact w/serial.c) + */ +static int kgdb_uart_setup(void) +{ + int port; + int lcr = 0; + int bdiv = 0; + + if (kgdb_portnum >= UART_NPORTS) { + KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum); + return -1; + } + + kgdb_uart_port = &uart_ports[kgdb_portnum]; + + /* Init sequence from gdb_hook_interrupt */ + UART_IN(UART_RX); + UART_OUT(UART_IER, 0); + + UART_IN(UART_RX); /* Serial driver comments say */ + UART_IN(UART_IIR); /* this clears interrupt regs */ + UART_IN(UART_MSR); + + /* Figure basic LCR values */ + switch (kgdb_bits) { + case '7': + lcr |= UART_LCR_WLEN7; + break; + default: case '8': + lcr |= UART_LCR_WLEN8; + break; + } + switch (kgdb_parity) { + case 'O': + lcr |= UART_LCR_PARITY; + break; + case 'E': + lcr |= (UART_LCR_PARITY | UART_LCR_EPAR); + break; + default: break; + } + + /* Figure the baud rate divisor */ + bdiv = (SB_BASE/kgdb_baud); + + /* Set the baud rate and LCR values */ + UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB)); + UART_OUT(UART_DLL, (bdiv & 0xff)); + UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff)); + UART_OUT(UART_LCR, lcr); + + /* Set the MCR */ + UART_OUT(UART_MCR, SB_MCR); + + /* Turn off FIFOs for now */ + UART_OUT(UART_FCR, 0); + + /* Setup complete: initialize function pointers */ + kgdb_getchar = kgdb_uart_getchar; + kgdb_putchar = kgdb_uart_putchar; + + return 0; +} +#endif /* CONFIG_SH_KGDB */ |