*/
#include <common.h>
-#include <devices.h>
-
-#define DCC_ARM9_RBIT (1 << 0)
-#define DCC_ARM9_WBIT (1 << 1)
-#define DCC_ARM11_RBIT (1 << 30)
-#define DCC_ARM11_WBIT (1 << 29)
-
-#define read_core_id(x) do { \
- __asm__ ("mrc p15, 0, %0, c0, c0, 0\n" : "=r" (x)); \
- x = (x >> 4) & 0xFFF; \
- } while (0);
+#include <serial.h>
+#if defined(CONFIG_CPU_V6)
/*
- * ARM9
+ * ARMV6
*/
-#define write_arm9_dcc(x) \
- __asm__ volatile ("mcr p14, 0, %0, c1, c0, 0\n" : : "r" (x))
-
-#define read_arm9_dcc(x) \
- __asm__ volatile ("mrc p14, 0, %0, c1, c0, 0\n" : "=r" (x))
+#define DCC_RBIT (1 << 30)
+#define DCC_WBIT (1 << 29)
-#define status_arm9_dcc(x) \
- __asm__ volatile ("mrc p14, 0, %0, c0, c0, 0\n" : "=r" (x))
+#define write_dcc(x) \
+ __asm__ volatile ("mcr p14, 0, %0, c0, c5, 0\n" : : "r" (x))
-#define can_read_arm9_dcc(x) do { \
- status_arm9_dcc(x); \
- x &= DCC_ARM9_RBIT; \
- } while (0);
+#define read_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c0, c5, 0\n" : "=r" (x))
-#define can_write_arm9_dcc(x) do { \
- status_arm9_dcc(x); \
- x &= DCC_ARM9_WBIT; \
- x = (x == 0); \
- } while (0);
+#define status_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c0, c1, 0\n" : "=r" (x))
+#elif defined(CONFIG_CPU_XSCALE)
/*
- * ARM11
+ * XSCALE
*/
-#define write_arm11_dcc(x) \
- __asm__ volatile ("mcr p14, 0, %0, c0, c5, 0\n" : : "r" (x))
+#define DCC_RBIT (1 << 31)
+#define DCC_WBIT (1 << 28)
-#define read_arm11_dcc(x) \
- __asm__ volatile ("mrc p14, 0, %0, c0, c5, 0\n" : "=r" (x))
+#define write_dcc(x) \
+ __asm__ volatile ("mcr p14, 0, %0, c8, c0, 0\n" : : "r" (x))
-#define status_arm11_dcc(x) \
- __asm__ volatile ("mrc p14, 0, %0, c0, c1, 0\n" : "=r" (x))
+#define read_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c9, c0, 0\n" : "=r" (x))
-#define can_read_arm11_dcc(x) do { \
- status_arm11_dcc(x); \
- x &= DCC_ARM11_RBIT; \
- } while (0);
+#define status_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
-#define can_write_arm11_dcc(x) do { \
- status_arm11_dcc(x); \
- x &= DCC_ARM11_WBIT; \
- x = (x == 0); \
- } while (0);
+#else
+#define DCC_RBIT (1 << 0)
+#define DCC_WBIT (1 << 1)
-#define TIMEOUT_COUNT 0x4000000
+#define write_dcc(x) \
+ __asm__ volatile ("mcr p14, 0, %0, c1, c0, 0\n" : : "r" (x))
+
+#define read_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c1, c0, 0\n" : "=r" (x))
+
+#define status_dcc(x) \
+ __asm__ volatile ("mrc p14, 0, %0, c0, c0, 0\n" : "=r" (x))
-static enum {
- arm9_and_earlier,
- arm11_and_later
-} arm_type = arm9_and_earlier;
-
-#ifndef CONFIG_ARM_DCC_MULTI
-#define arm_dcc_init serial_init
-void serial_setbrg(void) {}
-#define arm_dcc_getc serial_getc
-#define arm_dcc_putc serial_putc
-#define arm_dcc_puts serial_puts
-#define arm_dcc_tstc serial_tstc
#endif
-int arm_dcc_init(void)
-{
- register unsigned int id;
+#define can_read_dcc(x) do { \
+ status_dcc(x); \
+ x &= DCC_RBIT; \
+ } while (0);
- read_core_id(id);
+#define can_write_dcc(x) do { \
+ status_dcc(x); \
+ x &= DCC_WBIT; \
+ x = (x == 0); \
+ } while (0);
- if (id >= 0xb00)
- arm_type = arm11_and_later;
- else
- arm_type = arm9_and_earlier;
+#define TIMEOUT_COUNT 0x4000000
+static int arm_dcc_init(void)
+{
return 0;
}
-int arm_dcc_getc(void)
+static int arm_dcc_getc(void)
{
int ch;
register unsigned int reg;
- switch (arm_type) {
- case arm11_and_later:
- do {
- can_read_arm11_dcc(reg);
- } while (!reg);
- read_arm11_dcc(ch);
- break;
-
- case arm9_and_earlier:
- default:
- do {
- can_read_arm9_dcc(reg);
- } while (!reg);
- read_arm9_dcc(ch);
- break;
- }
+ do {
+ can_read_dcc(reg);
+ } while (!reg);
+ read_dcc(ch);
return ch;
}
-void arm_dcc_putc(char ch)
+static void arm_dcc_putc(char ch)
{
register unsigned int reg;
unsigned int timeout_count = TIMEOUT_COUNT;
- switch (arm_type) {
- case arm11_and_later:
- while (--timeout_count) {
- can_write_arm11_dcc(reg);
- if (reg)
- break;
- }
- if (timeout_count == 0)
- return;
- else
- write_arm11_dcc(ch);
- break;
-
- case arm9_and_earlier:
- default:
- while (--timeout_count) {
- can_write_arm9_dcc(reg);
- if (reg)
- break;
- }
- if (timeout_count == 0)
- return;
- else
- write_arm9_dcc(ch);
- break;
+ while (--timeout_count) {
+ can_write_dcc(reg);
+ if (reg)
+ break;
}
+ if (timeout_count == 0)
+ return;
+ else
+ write_dcc(ch);
}
-void arm_dcc_puts(const char *s)
-{
- while (*s)
- arm_dcc_putc(*s++);
-}
-
-int arm_dcc_tstc(void)
+static int arm_dcc_tstc(void)
{
register unsigned int reg;
- switch (arm_type) {
- case arm11_and_later:
- can_read_arm11_dcc(reg);
- break;
- case arm9_and_earlier:
- default:
- can_read_arm9_dcc(reg);
- break;
- }
+ can_read_dcc(reg);
return reg;
}
-#ifdef CONFIG_ARM_DCC_MULTI
-static device_t arm_dcc_dev;
-
-int drv_arm_dcc_init(void)
+static void arm_dcc_setbrg(void)
{
- int rc;
-
- /* Device initialization */
- memset(&arm_dcc_dev, 0, sizeof(arm_dcc_dev));
-
- strcpy(arm_dcc_dev.name, "dcc");
- arm_dcc_dev.ext = 0; /* No extensions */
- arm_dcc_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
- arm_dcc_dev.tstc = arm_dcc_tstc; /* 'tstc' function */
- arm_dcc_dev.getc = arm_dcc_getc; /* 'getc' function */
- arm_dcc_dev.putc = arm_dcc_putc; /* 'putc' function */
- arm_dcc_dev.puts = arm_dcc_puts; /* 'puts' function */
-
- rc = device_register(&arm_dcc_dev);
+}
- if (rc == 0) {
- arm_dcc_init();
- return 1;
- }
+static struct serial_device arm_dcc_drv = {
+ .name = "arm_dcc",
+ .start = arm_dcc_init,
+ .stop = NULL,
+ .setbrg = arm_dcc_setbrg,
+ .putc = arm_dcc_putc,
+ .puts = default_serial_puts,
+ .getc = arm_dcc_getc,
+ .tstc = arm_dcc_tstc,
+};
+
+void arm_dcc_initialize(void)
+{
+ serial_register(&arm_dcc_drv);
+}
- return 0;
+__weak struct serial_device *default_serial_console(void)
+{
+ return &arm_dcc_drv;
}
-#endif
projects / karo-tx-uboot.git / blobdiff