2009-04-23 09:22:13 +00:00
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/*
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*
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* arch/arm/mach-u300/core.c
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*
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*
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2012-08-13 08:11:15 +00:00
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* Copyright (C) 2007-2012 ST-Ericsson SA
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2009-04-23 09:22:13 +00:00
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* License terms: GNU General Public License (GPL) version 2
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* Core platform support, IRQ handling and device definitions.
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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*/
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#include <linux/kernel.h>
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2011-05-02 18:54:38 +00:00
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#include <linux/pinctrl/machine.h>
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2012-01-20 16:53:15 +00:00
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#include <linux/pinctrl/pinconf-generic.h>
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2012-06-19 21:44:25 +00:00
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#include <linux/platform_data/clk-u300.h>
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2012-08-13 08:56:43 +00:00
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#include <linux/platform_data/pinctrl-coh901.h>
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2013-04-08 09:38:50 +00:00
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#include <linux/irqchip.h>
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#include <linux/of_platform.h>
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#include <linux/clocksource.h>
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2013-04-22 09:29:30 +00:00
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#include <linux/clk.h>
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2009-04-23 09:22:13 +00:00
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#include <asm/mach/map.h>
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2012-08-13 09:35:55 +00:00
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#include <asm/mach/arch.h>
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2009-04-23 09:22:13 +00:00
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2013-04-22 09:29:30 +00:00
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#include <mach/u300-regs.h>
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2009-04-23 09:22:13 +00:00
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#include <mach/syscon.h>
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/*
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* Static I/O mappings that are needed for booting the U300 platforms. The
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* only things we need are the areas where we find the timer, syscon and
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* intcon, since the remaining device drivers will map their own memory
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* physical to virtual as the need arise.
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*/
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static struct map_desc u300_io_desc[] __initdata = {
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{
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.virtual = U300_SLOW_PER_VIRT_BASE,
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.pfn = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
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.length = SZ_64K,
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.type = MT_DEVICE,
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},
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{
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.virtual = U300_AHB_PER_VIRT_BASE,
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.pfn = __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
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.length = SZ_32K,
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.type = MT_DEVICE,
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},
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{
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.virtual = U300_FAST_PER_VIRT_BASE,
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.pfn = __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
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.length = SZ_32K,
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.type = MT_DEVICE,
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},
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};
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2012-08-13 09:35:55 +00:00
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static void __init u300_map_io(void)
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2009-04-23 09:22:13 +00:00
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{
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iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
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}
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2011-09-08 08:04:51 +00:00
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/*
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* The different variants have a few different versions of the
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* GPIO block, with different number of ports.
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*/
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static struct u300_gpio_platform u300_gpio_plat = {
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.ports = 7,
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.gpio_base = 0,
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};
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2012-01-20 16:53:15 +00:00
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static unsigned long pin_pullup_conf[] = {
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PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1),
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};
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static unsigned long pin_highz_conf[] = {
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PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0),
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};
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/* Pin control settings */
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2012-02-09 06:23:28 +00:00
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static struct pinctrl_map __initdata u300_pinmux_map[] = {
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2011-05-02 18:54:38 +00:00
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/* anonymous maps for chip power and EMIFs */
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2012-03-02 20:05:48 +00:00
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PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"),
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PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"),
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PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"),
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2011-05-02 18:54:38 +00:00
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/* per-device maps for MMC/SD, SPI and UART */
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2012-03-02 20:05:48 +00:00
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PIN_MAP_MUX_GROUP_DEFAULT("mmci", "pinctrl-u300", NULL, "mmc0"),
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PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"),
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PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"),
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2012-01-20 16:53:15 +00:00
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/* This pin is used for clock return rather than GPIO */
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PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11",
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pin_pullup_conf),
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/* This pin is used for card detect */
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PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS",
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pin_highz_conf),
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2011-05-02 18:54:38 +00:00
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};
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2009-04-23 09:22:13 +00:00
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struct db_chip {
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u16 chipid;
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const char *name;
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};
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/*
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* This is a list of the Digital Baseband chips used in the U300 platform.
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*/
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static struct db_chip db_chips[] __initdata = {
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{
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.chipid = 0xb800,
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.name = "DB3000",
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},
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{
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.chipid = 0xc000,
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.name = "DB3100",
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},
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{
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.chipid = 0xc800,
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.name = "DB3150",
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},
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{
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.chipid = 0xd800,
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.name = "DB3200",
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},
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{
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.chipid = 0xe000,
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.name = "DB3250",
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},
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{
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.chipid = 0xe800,
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.name = "DB3210",
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},
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{
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.chipid = 0xf000,
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.name = "DB3350 P1x",
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},
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{
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.chipid = 0xf100,
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.name = "DB3350 P2x",
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},
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{
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.chipid = 0x0000, /* List terminator */
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.name = NULL,
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}
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};
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2009-08-13 20:57:22 +00:00
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static void __init u300_init_check_chip(void)
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2009-04-23 09:22:13 +00:00
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{
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u16 val;
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struct db_chip *chip;
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const char *chipname;
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const char unknown[] = "UNKNOWN";
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/* Read out and print chip ID */
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR);
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/* This is in funky bigendian order... */
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val = (val & 0xFFU) << 8 | (val >> 8);
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chip = db_chips;
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chipname = unknown;
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for ( ; chip->chipid; chip++) {
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if (chip->chipid == (val & 0xFF00U)) {
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chipname = chip->name;
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break;
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}
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}
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printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
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"(chip ID 0x%04x)\n", chipname, val);
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if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
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2010-08-13 09:31:59 +00:00
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printk(KERN_ERR "Platform configured for BS335 " \
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2009-04-23 09:22:13 +00:00
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" with DB3350 but %s detected, expect problems!",
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chipname);
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}
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}
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2011-11-05 15:51:25 +00:00
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/* Forward declare this function from the watchdog */
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void coh901327_watchdog_reset(void);
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2012-08-13 09:35:55 +00:00
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static void u300_restart(char mode, const char *cmd)
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2011-11-05 15:51:25 +00:00
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{
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switch (mode) {
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case 's':
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case 'h':
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#ifdef CONFIG_COH901327_WATCHDOG
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coh901327_watchdog_reset();
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#endif
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break;
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default:
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/* Do nothing */
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break;
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}
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/* Wait for system do die/reset. */
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while (1);
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}
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2012-08-13 09:35:55 +00:00
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2013-04-08 09:38:50 +00:00
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/* These are mostly to get the right device names for the clock lookups */
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static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = {
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OF_DEV_AUXDATA("stericsson,pinctrl-u300", U300_SYSCON_BASE,
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"pinctrl-u300", NULL),
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OF_DEV_AUXDATA("stericsson,gpio-coh901", U300_GPIO_BASE,
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"u300-gpio", &u300_gpio_plat),
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2013-04-19 10:59:59 +00:00
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OF_DEV_AUXDATA("stericsson,coh901327", U300_WDOG_BASE,
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"coh901327_wdog", NULL),
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2013-04-19 11:22:57 +00:00
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OF_DEV_AUXDATA("stericsson,coh901331", U300_RTC_BASE,
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"rtc-coh901331", NULL),
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2013-04-19 11:44:25 +00:00
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OF_DEV_AUXDATA("stericsson,coh901318", U300_DMAC_BASE,
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"coh901318", NULL),
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2013-04-22 09:00:02 +00:00
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OF_DEV_AUXDATA("stericsson,fsmc-nand", U300_NAND_IF_PHYS_BASE,
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"fsmc-nand", NULL),
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2013-04-08 09:38:50 +00:00
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OF_DEV_AUXDATA("arm,primecell", U300_UART0_BASE,
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2013-04-22 09:29:30 +00:00
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"uart0", NULL),
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2013-04-08 09:38:50 +00:00
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OF_DEV_AUXDATA("arm,primecell", U300_UART1_BASE,
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2013-04-22 09:29:30 +00:00
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"uart1", NULL),
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2013-04-19 12:56:46 +00:00
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OF_DEV_AUXDATA("arm,primecell", U300_SPI_BASE,
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2013-04-22 09:29:30 +00:00
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"pl022", NULL),
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2013-04-11 13:13:39 +00:00
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OF_DEV_AUXDATA("st,ddci2c", U300_I2C0_BASE,
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"stu300.0", NULL),
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OF_DEV_AUXDATA("st,ddci2c", U300_I2C1_BASE,
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"stu300.1", NULL),
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2013-04-08 09:38:50 +00:00
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OF_DEV_AUXDATA("arm,primecell", U300_MMCSD_BASE,
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2013-04-22 09:29:30 +00:00
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"mmci", NULL),
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2013-04-08 09:38:50 +00:00
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{ /* sentinel */ },
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};
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static void __init u300_init_irq_dt(void)
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{
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struct clk *clk;
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/* initialize clocking early, we want to clock the INTCON */
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u300_clk_init(U300_SYSCON_VBASE);
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/* Bootstrap EMIF and SEMI clocks */
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clk = clk_get_sys("pl172", NULL);
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BUG_ON(IS_ERR(clk));
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clk_prepare_enable(clk);
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clk = clk_get_sys("semi", NULL);
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BUG_ON(IS_ERR(clk));
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clk_prepare_enable(clk);
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/* Clock the interrupt controller */
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clk = clk_get_sys("intcon", NULL);
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BUG_ON(IS_ERR(clk));
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clk_prepare_enable(clk);
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irqchip_init();
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}
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static void __init u300_init_machine_dt(void)
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{
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u16 val;
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/* Check what platform we run and print some status information */
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u300_init_check_chip();
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/* Initialize pinmuxing */
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pinctrl_register_mappings(u300_pinmux_map,
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ARRAY_SIZE(u300_pinmux_map));
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of_platform_populate(NULL, of_default_bus_match_table,
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u300_auxdata_lookup, NULL);
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/* Enable SEMI self refresh */
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
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U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
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}
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static const char * u300_board_compat[] = {
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"stericsson,u300",
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NULL,
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};
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DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)")
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.map_io = u300_map_io,
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.init_irq = u300_init_irq_dt,
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.init_time = clocksource_of_init,
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.init_machine = u300_init_machine_dt,
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.restart = u300_restart,
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.dt_compat = u300_board_compat,
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MACHINE_END
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