LXR linux/arch/arm/mach-nomadik/cpu-8815.c

   1/*
   2 * Copyright STMicroelectronics, 2007.
   3 *
   4 *  This program is free software; you can redistribute it and/or modify
   5 *  it under the terms of the GNU General Public License as published by
   6 *  the Free Software Foundation; either version 2 of the License, or
   7 *  (at your option) any later version.
   8 *
   9 *  This program is distributed in the hope that it will be useful,
  10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *  GNU General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License
  15 *  along with this program; if not, write to the Free Software
  16 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18
  19#include <linux/types.h>
  20#include <linux/init.h>
  21#include <linux/device.h>
  22#include <linux/amba/bus.h>
  23#include <linux/platform_device.h>
  24#include <linux/io.h>
  25#include <linux/slab.h>
  26#include <linux/irq.h>
  27#include <linux/dma-mapping.h>
  28#include <linux/platform_data/clk-nomadik.h>
  29#include <linux/clocksource.h>
  30#include <linux/of_irq.h>
  31#include <linux/of_gpio.h>
  32#include <linux/of_address.h>
  33#include <linux/of_platform.h>
  34#include <linux/mtd/fsmc.h>
  35#include <linux/gpio.h>
  36#include <linux/amba/mmci.h>
  37
  38#include <asm/mach/arch.h>
  39#include <asm/mach/map.h>
  40#include <asm/mach/time.h>
  41#include <asm/mach-types.h>
  42
  43#include <asm/cacheflush.h>
  44#include <asm/hardware/cache-l2x0.h>
  45
  46/*
  47 * These are the only hard-coded address offsets we still have to use.
  48 */
  49#define NOMADIK_FSMC_BASE       0x10100000      /* FSMC registers */
  50#define NOMADIK_SDRAMC_BASE     0x10110000      /* SDRAM Controller */
  51#define NOMADIK_CLCDC_BASE      0x10120000      /* CLCD Controller */
  52#define NOMADIK_MDIF_BASE       0x10120000      /* MDIF */
  53#define NOMADIK_DMA0_BASE       0x10130000      /* DMA0 Controller */
  54#define NOMADIK_IC_BASE         0x10140000      /* Vectored Irq Controller */
  55#define NOMADIK_DMA1_BASE       0x10150000      /* DMA1 Controller */
  56#define NOMADIK_USB_BASE        0x10170000      /* USB-OTG conf reg base */
  57#define NOMADIK_CRYP_BASE       0x10180000      /* Crypto processor */
  58#define NOMADIK_SHA1_BASE       0x10190000      /* SHA-1 Processor */
  59#define NOMADIK_XTI_BASE        0x101A0000      /* XTI */
  60#define NOMADIK_RNG_BASE        0x101B0000      /* Random number generator */
  61#define NOMADIK_SRC_BASE        0x101E0000      /* SRC base */
  62#define NOMADIK_WDOG_BASE       0x101E1000      /* Watchdog */
  63#define NOMADIK_MTU0_BASE       0x101E2000      /* Multiple Timer 0 */
  64#define NOMADIK_MTU1_BASE       0x101E3000      /* Multiple Timer 1 */
  65#define NOMADIK_GPIO0_BASE      0x101E4000      /* GPIO0 */
  66#define NOMADIK_GPIO1_BASE      0x101E5000      /* GPIO1 */
  67#define NOMADIK_GPIO2_BASE      0x101E6000      /* GPIO2 */
  68#define NOMADIK_GPIO3_BASE      0x101E7000      /* GPIO3 */
  69#define NOMADIK_RTC_BASE        0x101E8000      /* Real Time Clock base */
  70#define NOMADIK_PMU_BASE        0x101E9000      /* Power Management Unit */
  71#define NOMADIK_OWM_BASE        0x101EA000      /* One wire master */
  72#define NOMADIK_SCR_BASE        0x101EF000      /* Secure Control registers */
  73#define NOMADIK_MSP2_BASE       0x101F0000      /* MSP 2 interface */
  74#define NOMADIK_MSP1_BASE       0x101F1000      /* MSP 1 interface */
  75#define NOMADIK_UART2_BASE      0x101F2000      /* UART 2 interface */
  76#define NOMADIK_SSIRx_BASE      0x101F3000      /* SSI 8-ch rx interface */
  77#define NOMADIK_SSITx_BASE      0x101F4000      /* SSI 8-ch tx interface */
  78#define NOMADIK_MSHC_BASE       0x101F5000      /* Memory Stick(Pro) Host */
  79#define NOMADIK_SDI_BASE        0x101F6000      /* SD-card/MM-Card */
  80#define NOMADIK_I2C1_BASE       0x101F7000      /* I2C1 interface */
  81#define NOMADIK_I2C0_BASE       0x101F8000      /* I2C0 interface */
  82#define NOMADIK_MSP0_BASE       0x101F9000      /* MSP 0 interface */
  83#define NOMADIK_FIRDA_BASE      0x101FA000      /* FIrDA interface */
  84#define NOMADIK_UART1_BASE      0x101FB000      /* UART 1 interface */
  85#define NOMADIK_SSP_BASE        0x101FC000      /* SSP interface */
  86#define NOMADIK_UART0_BASE      0x101FD000      /* UART 0 interface */
  87#define NOMADIK_SGA_BASE        0x101FE000      /* SGA interface */
  88#define NOMADIK_L2CC_BASE       0x10210000      /* L2 Cache controller */
  89#define NOMADIK_UART1_VBASE     0xF01FB000
  90
  91/* This is needed for LL-debug/earlyprintk/debug-macro.S */
  92static struct map_desc cpu8815_io_desc[] __initdata = {
  93        {
  94                .virtual =      NOMADIK_UART1_VBASE,
  95                .pfn =          __phys_to_pfn(NOMADIK_UART1_BASE),
  96                .length =       SZ_4K,
  97                .type =         MT_DEVICE,
  98        },
  99};
 100
 101static void __init cpu8815_map_io(void)
 102{
 103        iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
 104}
 105
 106static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
 107{
 108        void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
 109
 110        /* FIXME: use egpio when implemented */
 111
 112        /* Write anything to Reset status register */
 113        writel(1, srcbase + 0x18);
 114}
 115
 116/* Initial value for SRC control register: all timers use MXTAL/8 source */
 117#define SRC_CR_INIT_MASK        0x00007fff
 118#define SRC_CR_INIT_VAL         0x2aaa8000
 119
 120static void __init cpu8815_timer_init_of(void)
 121{
 122        struct device_node *mtu;
 123        void __iomem *base;
 124        int irq;
 125        u32 src_cr;
 126
 127        /* We need this to be up now */
 128        nomadik_clk_init();
 129
 130        mtu = of_find_node_by_path("/mtu@101e2000");
 131        if (!mtu)
 132                return;
 133        base = of_iomap(mtu, 0);
 134        if (WARN_ON(!base))
 135                return;
 136        irq = irq_of_parse_and_map(mtu, 0);
 137
 138        pr_info("Remapped MTU @ %p, irq: %d\n", base, irq);
 139
 140        /* Configure timer sources in "system reset controller" ctrl reg */
 141        src_cr = readl(base);
 142        src_cr &= SRC_CR_INIT_MASK;
 143        src_cr |= SRC_CR_INIT_VAL;
 144        writel(src_cr, base);
 145
 146        clocksource_of_init();
 147}
 148
 149static struct fsmc_nand_timings cpu8815_nand_timings = {
 150        .thiz   = 0,
 151        .thold  = 0x10,
 152        .twait  = 0x0A,
 153        .tset   = 0,
 154};
 155
 156static struct fsmc_nand_platform_data cpu8815_nand_data = {
 157        .nand_timings = &cpu8815_nand_timings,
 158};
 159
 160/*
 161 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
 162 * to simply request an IRQ passed as a resource. So the GPIO pin needs
 163 * to be requested by this hog and set as input.
 164 */
 165static int __init cpu8815_eth_init(void)
 166{
 167        struct device_node *eth;
 168        int gpio, irq, err;
 169
 170        eth = of_find_node_by_path("/usb-s8815/ethernet-gpio");
 171        if (!eth) {
 172                pr_info("could not find any ethernet GPIO\n");
 173                return 0;
 174        }
 175        gpio = of_get_gpio(eth, 0);
 176        err = gpio_request(gpio, "eth_irq");
 177        if (err) {
 178                pr_info("failed to request ethernet GPIO\n");
 179                return -ENODEV;
 180        }
 181        err = gpio_direction_input(gpio);
 182        if (err) {
 183                pr_info("failed to set ethernet GPIO as input\n");
 184                return -ENODEV;
 185        }
 186        irq = gpio_to_irq(gpio);
 187        pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq);
 188        return 0;
 189}
 190device_initcall(cpu8815_eth_init);
 191
 192/*
 193 * TODO:
 194 * cannot be set from device tree, convert to a proper DT
 195 * binding.
 196 */
 197static struct mmci_platform_data mmcsd_plat_data = {
 198        .ocr_mask = MMC_VDD_29_30,
 199};
 200
 201/*
 202 * This GPIO pin turns on a line that is used to detect card insertion
 203 * on this board.
 204 */
 205static int __init cpu8815_mmcsd_init(void)
 206{
 207        struct device_node *cdbias;
 208        int gpio, err;
 209
 210        cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
 211        if (!cdbias) {
 212                pr_info("could not find MMC/SD card detect bias node\n");
 213                return 0;
 214        }
 215        gpio = of_get_gpio(cdbias, 0);
 216        if (gpio < 0) {
 217                pr_info("could not obtain MMC/SD card detect bias GPIO\n");
 218                return 0;
 219        }
 220        err = gpio_request(gpio, "card detect bias");
 221        if (err) {
 222                pr_info("failed to request card detect bias GPIO %d\n", gpio);
 223                return -ENODEV;
 224        }
 225        err = gpio_direction_output(gpio, 0);
 226        if (err){
 227                pr_info("failed to set GPIO %d as output, low\n", gpio);
 228                return err;
 229        }
 230        pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
 231        return 0;
 232}
 233device_initcall(cpu8815_mmcsd_init);
 234
 235
 236/* These are mostly to get the right device names for the clock lookups */
 237static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
 238        OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
 239                NULL, &cpu8815_nand_data),
 240        OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
 241                NULL, &mmcsd_plat_data),
 242        { /* sentinel */ },
 243};
 244
 245static void __init cpu8815_init_of(void)
 246{
 247#ifdef CONFIG_CACHE_L2X0
 248        /* At full speed latency must be >=2, so 0x249 in low bits */
 249        l2x0_of_init(0x00730249, 0xfe000fff);
 250#endif
 251        of_platform_populate(NULL, of_default_bus_match_table,
 252                        cpu8815_auxdata_lookup, NULL);
 253}
 254
 255static const char * cpu8815_board_compat[] = {
 256        "calaosystems,usb-s8815",
 257        NULL,
 258};
 259
 260DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
 261        .map_io         = cpu8815_map_io,
 262        .init_time      = cpu8815_timer_init_of,
 263        .init_machine   = cpu8815_init_of,
 264        .restart        = cpu8815_restart,
 265        .dt_compat      = cpu8815_board_compat,
 266MACHINE_END
 267