This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / plat-omap / common.c

diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c
new file mode 100644 (file)
index 0000000..adffc5a
--- /dev/null
+++ b/arch/arm/plat-omap/common.c
@@ -0,0 +1,159 @@
+/*
+ * linux/arch/arm/plat-omap/common.c
+ *
+ * Code common to all OMAP machines.
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/console.h>
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
+#include <linux/clk.h>
+
+#include <asm/hardware.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/mach/map.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/fpga.h>
+
+#include <asm/arch/clock.h>
+
+#define NO_LENGTH_CHECK 0xffffffff
+
+unsigned char omap_bootloader_tag[512];
+int omap_bootloader_tag_len;
+
+struct omap_board_config_kernel *omap_board_config;
+int omap_board_config_size;
+
+static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
+{
+       struct omap_board_config_kernel *kinfo = NULL;
+       int i;
+
+#ifdef CONFIG_OMAP_BOOT_TAG
+       struct omap_board_config_entry *info = NULL;
+
+       if (omap_bootloader_tag_len > 4)
+               info = (struct omap_board_config_entry *) omap_bootloader_tag;
+       while (info != NULL) {
+               u8 *next;
+
+               if (info->tag == tag) {
+                       if (skip == 0)
+                               break;
+                       skip--;
+               }
+
+               if ((info->len & 0x03) != 0) {
+                       /* We bail out to avoid an alignment fault */
+                       printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
+                              info->len, info->tag);
+                       return NULL;
+               }
+               next = (u8 *) info + sizeof(*info) + info->len;
+               if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
+                       info = NULL;
+               else
+                       info = (struct omap_board_config_entry *) next;
+       }
+       if (info != NULL) {
+               /* Check the length as a lame attempt to check for
+                * binary inconsistancy. */
+               if (len != NO_LENGTH_CHECK) {
+                       /* Word-align len */
+                       if (len & 0x03)
+                               len = (len + 3) & ~0x03;
+                       if (info->len != len) {
+                               printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
+                                      tag, len, info->len);
+                               return NULL;
+                       }
+               }
+               if (len_out != NULL)
+                       *len_out = info->len;
+               return info->data;
+       }
+#endif
+       /* Try to find the config from the board-specific structures
+        * in the kernel. */
+       for (i = 0; i < omap_board_config_size; i++) {
+               if (omap_board_config[i].tag == tag) {
+                       kinfo = &omap_board_config[i];
+                       break;
+               }
+       }
+       if (kinfo == NULL)
+               return NULL;
+       return kinfo->data;
+}
+
+const void *__omap_get_config(u16 tag, size_t len, int nr)
+{
+        return get_config(tag, len, nr, NULL);
+}
+EXPORT_SYMBOL(__omap_get_config);
+
+const void *omap_get_var_config(u16 tag, size_t *len)
+{
+        return get_config(tag, NO_LENGTH_CHECK, 0, len);
+}
+EXPORT_SYMBOL(omap_get_var_config);
+
+static int __init omap_add_serial_console(void)
+{
+       const struct omap_serial_console_config *con_info;
+       const struct omap_uart_config *uart_info;
+       static char speed[11], *opt = NULL;
+       int line, i, uart_idx;
+
+       uart_info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
+       con_info = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
+                                       struct omap_serial_console_config);
+       if (uart_info == NULL || con_info == NULL)
+               return 0;
+
+       if (con_info->console_uart == 0)
+               return 0;
+
+       if (con_info->console_speed) {
+               snprintf(speed, sizeof(speed), "%u", con_info->console_speed);
+               opt = speed;
+       }
+
+       uart_idx = con_info->console_uart - 1;
+       if (uart_idx >= OMAP_MAX_NR_PORTS) {
+               printk(KERN_INFO "Console: external UART#%d. "
+                       "Not adding it as console this time.\n",
+                       uart_idx + 1);
+               return 0;
+       }
+       if (!(uart_info->enabled_uarts & (1 << uart_idx))) {
+               printk(KERN_ERR "Console: Selected UART#%d is "
+                       "not enabled for this platform\n",
+                       uart_idx + 1);
+               return -1;
+       }
+       line = 0;
+       for (i = 0; i < uart_idx; i++) {
+               if (uart_info->enabled_uarts & (1 << i))
+                       line++;
+       }
+       return add_preferred_console("ttyS", line, opt);
+}
+console_initcall(omap_add_serial_console);