分类： 嵌入式
2013-05-19 10:24:56
主机操作系统： Debian 6.0
开发板内核： 2.6.38
主机交叉编译器： arm-none-linux-gnueabi-gcc version 4.5.1 (Sourcery G++ Lite 2010.09-50)
1. 首先从
2. 内核与代码目录 /home/enzo/H9200F/linux-2.6.38，将补丁文件拷贝到/home/enzo/H9200F目录
3. 给内核打上at91rm9200补丁，切换工作目录到/home/enzo/H9200F/linux-2.6.38/执行一下命令:
zcat ../2.6.38-at91.patch.gz |patch p1
以下内容为自己修改支持SD卡补丁
diff --git a/arch/arm/mach-at91/at91rm9200_devices.c b/arch/arm/mach-at91/at91rm9200_devices.c
index c1f9feb..e3405cf 100644
--- a/arch/arm/mach-at91/at91rm9200_devices.c
+++ b/arch/arm/mach-at91/at91rm9200_devices.c
@@ -563,9 +563,9 @@ void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
for (i = 0; i < nr_devices; i++) {
if (devices[i].controller_data)
cs_pin = (unsigned long) devices[i].controller_data;
- else
+ else /*使用PA4标准片选*/
cs_pin = spi_standard_cs[devices[i].chip_select];
-
+ /* 设置片选线为输出 */
if (devices[i].chip_select == 0) /* for CS0 errata */
at91_set_A_periph(cs_pin, 0);
else
@@ -583,6 +583,7 @@ void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
}
spi_register_board_info(devices, nr_devices);
+ /* 注册spi设备 */
platform_device_register(&at91rm9200_spi_device);
}
#else
diff --git a/arch/arm/mach-at91/board-rm9200dk.c b/arch/arm/mach-at91/board-rm9200dk.c
index 5b0611e..cc716cd 100644
--- a/arch/arm/mach-at91/board-rm9200dk.c
+++ b/arch/arm/mach-at91/board-rm9200dk.c
@@ -29,6 +29,7 @@
#include
#include
#include
+#include
#include
#include
@@ -278,8 +279,43 @@ static struct at91_mmc_data __initdata dk_mmc_data = {
.wire4 = 1,
.wire4 = 0, //9200 4 wire mode has some problem,but 1 wire mode work well.
};
+static void __init mcp251x_init(void)
+{
+// at91_set_gpio_output(AT91_PIN_PB17, 0); /* power on */
+// at91_set_gpio_output(AT91_PIN_PB16, 1); /* can reset */
+
+ at91_set_gpio_input(AT91_PIN_PC0, 1);
+ at91_set_deglitch(AT91_PIN_PC0, 1);
+}
+
+static int mcp251x_power_enable(int enable)
+{
+ printk(KERN_INFO "mcp251x_power_enable\n");
+ return 0;
+}
+
+
+static struct mcp251x_platform_data mcp251x_info = {
+ .oscillator_frequency = 16000000,
+ //.board_specific_setup = myboard_mcp251x_initfunc,
+ //.device_reset = myboard_mcp251x_reset,
+ .power_enable = NULL,
+ .transceiver_enable = NULL,
+};
static struct spi_board_info dk_spi_devices[] = {
+ {
+ .modalias = "mcp2515", //与实际芯片名字一致，不能为mcp251x,参见mcp251x.c注释
+ .platform_data = &mcp251x_info, //上面的结构体
+ .irq = AT91_PIN_PC0, // 中断端口号
+ .max_speed_hz = 8000000, //spi最大的速度
+// .bus_num = 0, //spi控制器编号
+ .chip_select = 1, //片选编号
+ .controller_data = (void *) AT91_PIN_PA4, /* CS pin */
+
+ },
+
+#if 0
{ /* DataFlash chip */
.modalias = "mtd_dataflash",
.chip_select = 0,
@@ -302,8 +338,10 @@ static struct spi_board_info dk_spi_devices[] = {
.max_speed_hz = 15 * 1000 * 1000,
}
#endif
+#endif
};
+
static struct i2c_board_info __initdata dk_i2c_devices[] = {
{
I2C_BOARD_INFO("ics1523", 0x26),
@@ -383,11 +421,13 @@ static void __init dk_board_init(void)
// at91_add_device_udc(&dk_udc_data);
// at91_set_multi_drive(dk_udc_data.pullup_pin, 1); /* pullup_pin is connected to reset */
/* Compact Flash */
- at91_add_device_cf(&dk_cf_data);
+// at91_add_device_cf(&dk_cf_data);
/* I2C */
- at91_add_device_i2c(dk_i2c_devices, ARRAY_SIZE(dk_i2c_devices));
+// at91_add_device_i2c(dk_i2c_devices, ARRAY_SIZE(dk_i2c_devices));
/* SPI */
+ mcp251x_init();
at91_add_device_spi(dk_spi_devices, ARRAY_SIZE(dk_spi_devices));
+
#ifdef CONFIG_MTD_AT91_DATAFLASH_CARD
/* DataFlash card */
at91_set_gpio_output(AT91_PIN_PB7, 0);
@@ -397,17 +437,17 @@ static void __init dk_board_init(void)
at91_add_device_mmc(0, &dk_mmc_data);
#endif
/* NAND */
- at91_add_device_nand(&dk_nand_data);
+// at91_add_device_nand(&dk_nand_data);
/* NOR Flash */
platform_device_register(&dk_flash);
/* LEDs */
- at91_gpio_leds(dk_leds, ARRAY_SIZE(dk_leds));
+// at91_gpio_leds(dk_leds, ARRAY_SIZE(dk_leds));
/* SSC (to LM4549 audio codec) */
- at91_add_device_ssc(AT91RM9200_ID_SSC1, ATMEL_SSC_TD | ATMEL_SSC_RX);
+// at91_add_device_ssc(AT91RM9200_ID_SSC1, ATMEL_SSC_TD | ATMEL_SSC_RX);
/* SSC (to SI3021 line interface) */
- at91_add_device_ssc(AT91RM9200_ID_SSC2, ATMEL_SSC_TD | ATMEL_SSC_TK | ATMEL_SSC_RD | ATMEL_SSC_RF);
+// at91_add_device_ssc(AT91RM9200_ID_SSC2, ATMEL_SSC_TD | ATMEL_SSC_TK | ATMEL_SSC_RD | ATMEL_SSC_RF);
/* VGA */
- dk_add_device_video();
+// dk_add_device_video();
}
MACHINE_START(AT91RM9200, "Atmel AT91RM9200-DK")
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 7513c45..90e1f3f 100644
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c
@@ -915,6 +915,11 @@ static int mcp251x_open(struct net_device *net)
struct spi_device *spi = priv->spi;
struct mcp251x_platform_data *pdata = spi->dev.platform_data;
int ret;
+ unsigned long irq_flags;
+/*
+ dev_dbg(&spi->dev, "%s: irq_flags: %d oscillator_frequency: %d\n", \
+ __FUNCTION__, pdata->irq_flags,pdata->oscillator_frequency);
+*/
ret = open_candev(net);
if (ret) {
@@ -929,9 +934,12 @@ static int mcp251x_open(struct net_device *net)
priv->force_quit = 0;
priv->tx_skb = NULL;
priv->tx_len = 0;
-
+ /* atmel 必须使用上升沿+下降沿，不能只用上升沿，或下降沿， at91 GPIO是电平变化中断 */
+ irq_flags = IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING;
+// irq_flags |= IRQF_ONESHOT;
+ dev_dbg(&spi->dev, "%s: irq_flags: %d oscillator_frequency: %d\n",__FUNCTION__, irq_flags,pdata->oscillator_frequency);
ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,
- IRQF_TRIGGER_FALLING, DEVICE_NAME, priv);
+ irq_flags, DEVICE_NAME, priv);
if (ret) {
dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);
if (pdata->transceiver_enable)
@@ -978,7 +986,7 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
struct mcp251x_priv *priv;
struct mcp251x_platform_data *pdata = spi->dev.platform_data;
int ret = -ENODEV;
-
+ dev_dbg(&spi->dev, "%s: start\n", __FUNCTION__);
if (!pdata)
/* Platform data is required for osc freq */
goto error_out;
diff --git a/kernel/printk.c b/kernel/printk.c
index 3623152..39f9878 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -57,7 +57,7 @@ void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
/* We show everything that is MORE important than this.. */
#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */
-#define DEFAULT_CONSOLE_LOGLEVEL 7 /* anything MORE serious than KERN_DEBUG */
+#define DEFAULT_CONSOLE_LOGLEVEL 8 /* anything MORE serious than KERN_DEBUG */
DECLARE_WAIT_QUEUE_HEAD(log_wait);
Device Drivers -à
<*>MMC/SD/SDIO card support -à
<*> MMC block device driver
(8) Number of minors per block device
[*] Use bounce buffer for simple hosts
<*> Atmel SD/MMC Driver(AT91 SD/MMC Card Interface support
(X)AT91 SD/MMC Card Interface support
make uImage
