/* * linux/arch/arm/mach-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 #include #include #include #include #include #include #include #include #include #include #include #include #include /* * ---------------------------------------------------------------------------- * OMAP revision check * * Since we use the cpu_is_omapnnnn() macros, there's a chance that a board * switches to an updated core. We want to print out the OMAP revision early. * * We use the system_serial registers for the revision information so we * can see it in /proc/cpuinfo. * * If the OMAP detection gets more complicated, we may want to expand this * to store the OMAP version and replace the current cpu_is_omapnnnn() macros. * * ---------------------------------------------------------------------------- */ static void __init omap_check_revision(void) { system_serial_high = omap_readl(OMAP_ID_BASE); system_serial_low = OMAP_ID_REG; system_rev = (OMAP_ID_REG >> ID_SHIFT) & ID_MASK; printk("OMAP revision: %d.%d (0x%08x) id: 0x%08x detected as OMAP-", (system_serial_high >> 20) & 0xf, (system_serial_high >> 16) & 0xf, system_serial_high, system_serial_low); switch (system_rev) { case OMAP_ID_730: printk("730\n"); system_rev = 0x730; break; case OMAP_ID_1510: printk("1510\n"); system_rev = 0x1510; break; case OMAP_ID_1610: printk("1610\n"); system_rev = 0x1610; break; case OMAP_ID_1710: printk("1710\n"); system_rev = 0x1710; break; case OMAP_ID_5912: printk("5912/1611B\n"); system_rev = 0x5912; break; default: printk("unknown, please add support!\n"); } } /* * ---------------------------------------------------------------------------- * OMAP I/O mapping * * The machine specific code may provide the extra mapping besides the * default mapping provided here. * ---------------------------------------------------------------------------- */ static struct map_desc omap_io_desc[] __initdata = { { IO_VIRT, IO_PHYS, IO_SIZE, MT_DEVICE }, }; #ifdef CONFIG_ARCH_OMAP730 static struct map_desc omap730_io_desc[] __initdata = { { OMAP730_DSP_BASE, OMAP730_DSP_START, OMAP730_DSP_SIZE, MT_DEVICE }, { OMAP730_DSPREG_BASE, OMAP730_DSPREG_START, OMAP730_DSPREG_SIZE, MT_DEVICE }, { OMAP730_SRAM_BASE, OMAP730_SRAM_START, OMAP730_SRAM_SIZE, MT_DEVICE } }; #endif #ifdef CONFIG_ARCH_OMAP1510 static struct map_desc omap1510_io_desc[] __initdata = { { OMAP1510_DSP_BASE, OMAP1510_DSP_START, OMAP1510_DSP_SIZE, MT_DEVICE }, { OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_START, OMAP1510_DSPREG_SIZE, MT_DEVICE }, { OMAP1510_SRAM_BASE, OMAP1510_SRAM_START, OMAP1510_SRAM_SIZE, MT_DEVICE } }; #endif #if defined(CONFIG_ARCH_OMAP1610) || defined(CONFIG_ARCH_OMAP1710) static struct map_desc omap1610_io_desc[] __initdata = { { OMAP1610_DSP_BASE, OMAP1610_DSP_START, OMAP1610_DSP_SIZE, MT_DEVICE }, { OMAP1610_DSPREG_BASE, OMAP1610_DSPREG_START, OMAP1610_DSPREG_SIZE, MT_DEVICE }, { OMAP1610_SRAM_BASE, OMAP1610_SRAM_START, OMAP1610_SRAM_SIZE, MT_DEVICE } }; #endif #ifdef CONFIG_ARCH_OMAP5912 static struct map_desc omap5912_io_desc[] __initdata = { { OMAP5912_DSP_BASE, OMAP5912_DSP_START, OMAP5912_DSP_SIZE, MT_DEVICE }, { OMAP5912_DSPREG_BASE, OMAP5912_DSPREG_START, OMAP5912_DSPREG_SIZE, MT_DEVICE }, /* * The OMAP5912 has 250kByte internal SRAM. Because the mapping is baseed on page * size (4kByte), it seems that the last 2kByte (=0x800) of the 250kByte are not mapped. * Add additional 2kByte (0x800) so that the last page is mapped and the last 2kByte * can be used. */ { OMAP5912_SRAM_BASE, OMAP5912_SRAM_START, OMAP5912_SRAM_SIZE + 0x800, MT_DEVICE } }; #endif static int initialized = 0; static void __init _omap_map_io(void) { initialized = 1; /* We have to initialize the IO space mapping before we can run * cpu_is_omapxxx() macros. */ iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); omap_check_revision(); #ifdef CONFIG_ARCH_OMAP730 if (cpu_is_omap730()) { iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc)); } #endif #ifdef CONFIG_ARCH_OMAP1510 if (cpu_is_omap1510()) { iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); } #endif #if defined(CONFIG_ARCH_OMAP1610) || defined(CONFIG_ARCH_OMAP1710) if (cpu_is_omap1610() || cpu_is_omap1710()) { iotable_init(omap1610_io_desc, ARRAY_SIZE(omap1610_io_desc)); } #endif #ifdef CONFIG_ARCH_OMAP5912 if (cpu_is_omap5912()) { iotable_init(omap5912_io_desc, ARRAY_SIZE(omap5912_io_desc)); } #endif /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort * on a Posted Write in the TIPB Bridge". */ omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); /* Must init clocks early to assure that timer interrupt works */ init_ck(); } /* * This should only get called from board specific init */ void omap_map_io(void) { if (!initialized) _omap_map_io(); } extern int omap_bootloader_tag_len; extern u8 omap_bootloader_tag[]; struct omap_board_config_kernel *omap_board_config; int omap_board_config_size = 0; const void *__omap_get_config(u16 tag, size_t len) { struct omap_board_config_entry *info = NULL; struct omap_board_config_kernel *kinfo = NULL; int i; #ifdef CONFIG_OMAP_BOOT_TAG if (omap_bootloader_tag_len > 4) info = (struct omap_board_config_entry *) omap_bootloader_tag; while (info != NULL) { u8 *next; if (info->tag == tag) break; 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 (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; } 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; } EXPORT_SYMBOL(__omap_get_config); static int __init omap_add_serial_console(void) { const struct omap_uart_config *info; info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config); if (info != NULL && info->console_uart) { static char speed[11], *opt = NULL; if (info->console_speed) { snprintf(speed, sizeof(speed), "%u", info->console_speed); opt = speed; } return add_preferred_console("ttyS", info->console_uart - 1, opt); } return 0; } console_initcall(omap_add_serial_console);