kevin/linux
1
Fork 0
Code
35aefb2645
linux/arch/m68k/platform/5249/config.c
Greg Ungerer 35aefb2645 m68knommu: modify timer init code to make it consistent with m68k code 
With a few small changes we can make the m68knommu timer init code the
same as the m68k code. By using the mach_sched_init function pointer
and reworking the current timer initializers to keep track of the common
m68k timer_interrupt() handler we end up with almost identical code for
m68knommu.

This will allow us to more easily merge the mmu and non-mmu m68k time.c
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-03-05 09:43:04 +10:00

332 lines
7.8 KiB
C
Raw Blame History

/***************************************************************************/
/*
* linux/arch/m68knommu/platform/5249/config.c
*
* Copyright (C) 2002, Greg Ungerer (gerg@snapgear.com)
*/
/***************************************************************************/
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>
/***************************************************************************/
static struct mcf_platform_uart m5249_uart_platform[] = {
{
.mapbase = MCF_MBAR + MCFUART_BASE1,
.irq = 73,
},
{
.mapbase = MCF_MBAR + MCFUART_BASE2,
.irq = 74,
},
{ },
};
static struct platform_device m5249_uart = {
.name = "mcfuart",
.id = 0,
.dev.platform_data = m5249_uart_platform,
};
#ifdef CONFIG_M5249C3
static struct resource m5249_smc91x_resources[] = {
{
.start = 0xe0000300,
.end = 0xe0000300 + 0x100,
.flags = IORESOURCE_MEM,
},
{
.start = MCFINTC2_GPIOIRQ6,
.end = MCFINTC2_GPIOIRQ6,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device m5249_smc91x = {
.name = "smc91x",
.id = 0,
.num_resources = ARRAY_SIZE(m5249_smc91x_resources),
.resource = m5249_smc91x_resources,
};
#endif /* CONFIG_M5249C3 */
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
static struct resource m5249_qspi_resources[] = {
{
.start = MCFQSPI_IOBASE,
.end = MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1,
.flags = IORESOURCE_MEM,
},
{
.start = MCF_IRQ_QSPI,
.end = MCF_IRQ_QSPI,
.flags = IORESOURCE_IRQ,
},
};
#define MCFQSPI_CS0 29
#define MCFQSPI_CS1 24
#define MCFQSPI_CS2 21
#define MCFQSPI_CS3 22
static int m5249_cs_setup(struct mcfqspi_cs_control *cs_control)
{
int status;
status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
if (status) {
pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
goto fail0;
}
status = gpio_direction_output(MCFQSPI_CS0, 1);
if (status) {
pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
goto fail1;
}
status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
if (status) {
pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
goto fail1;
}
status = gpio_direction_output(MCFQSPI_CS1, 1);
if (status) {
pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
goto fail2;
}
status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
if (status) {
pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
goto fail2;
}
status = gpio_direction_output(MCFQSPI_CS2, 1);
if (status) {
pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
goto fail3;
}
status = gpio_request(MCFQSPI_CS3, "MCFQSPI_CS3");
if (status) {
pr_debug("gpio_request for MCFQSPI_CS3 failed\n");
goto fail3;
}
status = gpio_direction_output(MCFQSPI_CS3, 1);
if (status) {
pr_debug("gpio_direction_output for MCFQSPI_CS3 failed\n");
goto fail4;
}
return 0;
fail4:
gpio_free(MCFQSPI_CS3);
fail3:
gpio_free(MCFQSPI_CS2);
fail2:
gpio_free(MCFQSPI_CS1);
fail1:
gpio_free(MCFQSPI_CS0);
fail0:
return status;
}
static void m5249_cs_teardown(struct mcfqspi_cs_control *cs_control)
{
gpio_free(MCFQSPI_CS3);
gpio_free(MCFQSPI_CS2);
gpio_free(MCFQSPI_CS1);
gpio_free(MCFQSPI_CS0);
}
static void m5249_cs_select(struct mcfqspi_cs_control *cs_control,
u8 chip_select, bool cs_high)
{
switch (chip_select) {
case 0:
gpio_set_value(MCFQSPI_CS0, cs_high);
break;
case 1:
gpio_set_value(MCFQSPI_CS1, cs_high);
break;
case 2:
gpio_set_value(MCFQSPI_CS2, cs_high);
break;
case 3:
gpio_set_value(MCFQSPI_CS3, cs_high);
break;
}
}
static void m5249_cs_deselect(struct mcfqspi_cs_control *cs_control,
u8 chip_select, bool cs_high)
{
switch (chip_select) {
case 0:
gpio_set_value(MCFQSPI_CS0, !cs_high);
break;
case 1:
gpio_set_value(MCFQSPI_CS1, !cs_high);
break;
case 2:
gpio_set_value(MCFQSPI_CS2, !cs_high);
break;
case 3:
gpio_set_value(MCFQSPI_CS3, !cs_high);
break;
}
}
static struct mcfqspi_cs_control m5249_cs_control = {
.setup = m5249_cs_setup,
.teardown = m5249_cs_teardown,
.select = m5249_cs_select,
.deselect = m5249_cs_deselect,
};
static struct mcfqspi_platform_data m5249_qspi_data = {
.bus_num = 0,
.num_chipselect = 4,
.cs_control = &m5249_cs_control,
};
static struct platform_device m5249_qspi = {
.name = "mcfqspi",
.id = 0,
.num_resources = ARRAY_SIZE(m5249_qspi_resources),
.resource = m5249_qspi_resources,
.dev.platform_data = &m5249_qspi_data,
};
static void __init m5249_qspi_init(void)
{
/* QSPI irq setup */
writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
MCF_MBAR + MCFSIM_QSPIICR);
mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
}
#endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */
static struct platform_device *m5249_devices[] __initdata = {
&m5249_uart,
#ifdef CONFIG_M5249C3
&m5249_smc91x,
#endif
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
&m5249_qspi,
#endif
};
/***************************************************************************/
static void __init m5249_uart_init_line(int line, int irq)
{
if (line == 0) {
writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI1, MCF_MBAR + MCFSIM_UART1ICR);
writeb(irq, MCF_MBAR + MCFUART_BASE1 + MCFUART_UIVR);
mcf_mapirq2imr(irq, MCFINTC_UART0);
} else if (line == 1) {
writeb(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI2, MCF_MBAR + MCFSIM_UART2ICR);
writeb(irq, MCF_MBAR + MCFUART_BASE2 + MCFUART_UIVR);
mcf_mapirq2imr(irq, MCFINTC_UART1);
}
}
static void __init m5249_uarts_init(void)
{
const int nrlines = ARRAY_SIZE(m5249_uart_platform);
int line;
for (line = 0; (line < nrlines); line++)
m5249_uart_init_line(line, m5249_uart_platform[line].irq);
}
/***************************************************************************/
#ifdef CONFIG_M5249C3
static void __init m5249_smc91x_init(void)
{
u32 gpio;
/* Set the GPIO line as interrupt source for smc91x device */
gpio = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
writel(gpio | 0x40, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
gpio = readl(MCF_MBAR2 + MCFSIM2_INTLEVEL5);
writel(gpio | 0x04000000, MCF_MBAR2 + MCFSIM2_INTLEVEL5);
}
#endif /* CONFIG_M5249C3 */
/***************************************************************************/
static void __init m5249_timers_init(void)
{
/* Timer1 is always used as system timer */
writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI3,
MCF_MBAR + MCFSIM_TIMER1ICR);
mcf_mapirq2imr(MCF_IRQ_TIMER, MCFINTC_TIMER1);
#ifdef CONFIG_HIGHPROFILE
/* Timer2 is to be used as a high speed profile timer */
writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL7 | MCFSIM_ICR_PRI3,
MCF_MBAR + MCFSIM_TIMER2ICR);
mcf_mapirq2imr(MCF_IRQ_PROFILER, MCFINTC_TIMER2);
#endif
}
/***************************************************************************/
void m5249_cpu_reset(void)
{
local_irq_disable();
/* Set watchdog to soft reset, and enabled */
__raw_writeb(0xc0, MCF_MBAR + MCFSIM_SYPCR);
for (;;)
/* wait for watchdog to timeout */;
}
/***************************************************************************/
void __init config_BSP(char *commandp, int size)
{
mach_reset = m5249_cpu_reset;
mach_sched_init = hw_timer_init;
m5249_timers_init();
m5249_uarts_init();
#ifdef CONFIG_M5249C3
m5249_smc91x_init();
#endif
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
m5249_qspi_init();
#endif
}
/***************************************************************************/
static int __init init_BSP(void)
{
platform_add_devices(m5249_devices, ARRAY_SIZE(m5249_devices));
return 0;
}
arch_initcall(init_BSP);
/***************************************************************************/
View Git Blame Copy Permalink