adsbitsy.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- * linux/arch/arm/mach-sa1100/adsbitsy.c
- *
- * Author: Woojung Huh
- *
- * Pieces specific to the ADS Bitsy
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.h>
- #include <linux/serial_core.h>
- #include <asm/hardware.h>
- #include <asm/setup.h>
- #include <asm/irq.h>
- #include <asm/mach/irq.h>
- #include <asm/mach/arch.h>
- #include <asm/mach/map.h>
- #include <asm/mach/serial_sa1100.h>
- #include <asm/arch/irq.h>
- #include "generic.h"
- #include "sa1111.h"
- static int __init adsbitsy_init(void)
- {
- int ret;
- if (!machine_is_adsbitsy())
- return -ENODEV;
- /*
- * Ensure that the memory bus request/grant signals are setup,
- * and the grant is held in its inactive state
- */
- sa1110_mb_disable();
- /*
- * Reset SA1111
- */
- GPCR |= GPIO_GPIO26;
- udelay(1000);
- GPSR |= GPIO_GPIO26;
- /*
- * Probe for SA1111.
- */
- ret = sa1111_probe(ADSBITSY_SA1111_BASE);
- if (ret < 0)
- return ret;
- /*
- * We found it. Wake the chip up.
- */
- sa1111_wake();
- /*
- * The SDRAM configuration of the SA1110 and the SA1111 must
- * match. This is very important to ensure that SA1111 accesses
- * don't corrupt the SDRAM. Note that this ungates the SA1111's
- * MBGNT signal, so we must have called sa1110_mb_disable()
- * beforehand.
- */
- sa1111_configure_smc(1,
- FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
- FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
- /*
- * Enable PWM control for LCD
- */
- SKPCR |= SKPCR_PWMCLKEN;
- SKPWM0 = 0x7F; // VEE
- SKPEN0 = 1;
- SKPWM1 = 0x01; // Backlight
- SKPEN1 = 1;
- /*
- * We only need to turn on DCLK whenever we want to use the
- * DMA. It can otherwise be held firmly in the off position.
- */
- SKPCR |= SKPCR_DCLKEN;
- /*
- * Enable the SA1110 memory bus request and grant signals.
- */
- sa1110_mb_enable();
- set_GPIO_IRQ_edge(GPIO_GPIO0, GPIO_RISING_EDGE);
- sa1111_init_irq(IRQ_GPIO0);
- return 0;
- }
- __initcall(adsbitsy_init);
- static void __init adsbitsy_init_irq(void)
- {
- /* First the standard SA1100 IRQs */
- sa1100_init_irq();
- }
- /*
- * Initialization fixup
- */
- static void __init
- fixup_adsbitsy(struct machine_desc *desc, struct param_struct *params,
- char **cmdline, struct meminfo *mi)
- {
- SET_BANK( 0, 0xc0000000, 32*1024*1024 );
- mi->nr_banks = 1;
- ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
- setup_ramdisk( 1, 0, 0, 8192 );
- setup_initrd( __phys_to_virt(0xc0800000), 4*1024*1024 );
- }
- static struct map_desc adsbitsy_io_desc[] __initdata = {
- /* virtual physical length domain r w c b */
- { 0xe8000000, 0x08000000, 0x01000000, DOMAIN_IO, 0, 1, 0, 0 }, /* Flash bank 1 */
- { 0xf4000000, 0x18000000, 0x00800000, DOMAIN_IO, 0, 1, 0, 0 }, /* SA1111 */
- LAST_DESC
- };
- static int adsbitsy_uart_open(struct uart_port *port, struct uart_info *info)
- {
- if (port->mapbase == _Ser1UTCR0) {
- Ser1SDCR0 |= SDCR0_UART;
- #error Fixme // Set RTS High (should be done in the set_mctrl fn)
- GPCR = GPIO_GPIO15;
- } else if (port->mapbase == _Ser2UTCR0) {
- Ser2UTCR4 = Ser2HSCR0 = 0;
- #error Fixme // Set RTS High (should be done in the set_mctrl fn)
- GPCR = GPIO_GPIO17;
- } else if (port->mapbase == _Ser2UTCR0) {
- #error Fixme // Set RTS High (should be done in the set_mctrl fn)
- GPCR = GPIO_GPIO19;
- }
- return 0;
- }
- static struct sa1100_port_fns adsbitsy_port_fns __initdata = {
- open: adsbitsy_uart_open,
- };
- static void __init adsbitsy_map_io(void)
- {
- sa1100_map_io();
- iotable_init(adsbitsy_io_desc);
- sa1100_register_uart_fns(&adsbitsy_port_fns);
- sa1100_register_uart(0, 3);
- sa1100_register_uart(1, 1);
- sa1100_register_uart(2, 2);
- GPDR |= GPIO_GPIO15 | GPIO_GPIO17 | GPIO_GPIO19;
- GPDR &= ~(GPIO_GPIO14 | GPIO_GPIO16 | GPIO_GPIO18);
- }
- MACHINE_START(ADSBITSY, "ADS Bitsy")
- BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
- FIXUP(fixup_adsbitsy)
- MAPIO(adsbitsy_map_io)
- INITIRQ(adsbitsy_init_irq)
- MACHINE_END