arch/arm/mach-imx/mach-qong.c

   1 /*
   2  *  Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
   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
  15 #include <linux/types.h>
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/memory.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/mtd/physmap.h>
  21 #include <linux/mtd/nand.h>
  22 #include <linux/gpio.h>
  23
  24 #include <asm/mach-types.h>
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/time.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/page.h>
  29 #include <asm/setup.h>
  30
  31 #include "common.h"
  32 #include "devices-imx31.h"
  33 #include "hardware.h"
  34 #include "iomux-mx3.h"
  35
  36 /* FPGA defines */
  37 #define QONG_FPGA_VERSION(major, minor, rev)    \
  38         (((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))
  39
  40 #define QONG_FPGA_BASEADDR              MX31_CS1_BASE_ADDR
  41 #define QONG_FPGA_PERIPH_SIZE           (1 << 24)
  42
  43 #define QONG_FPGA_CTRL_BASEADDR         QONG_FPGA_BASEADDR
  44 #define QONG_FPGA_CTRL_SIZE             0x10
  45 /* FPGA control registers */
  46 #define QONG_FPGA_CTRL_VERSION          0x00
  47
  48 #define QONG_DNET_ID            1
  49 #define QONG_DNET_BASEADDR      \
  50         (QONG_FPGA_BASEADDR + QONG_DNET_ID * QONG_FPGA_PERIPH_SIZE)
  51 #define QONG_DNET_SIZE          0x00001000
  52
  53 static const struct imxuart_platform_data uart_pdata __initconst = {
  54         .flags = IMXUART_HAVE_RTSCTS,
  55 };
  56
  57 static int uart_pins[] = {
  58         MX31_PIN_CTS1__CTS1,
  59         MX31_PIN_RTS1__RTS1,
  60         MX31_PIN_TXD1__TXD1,
  61         MX31_PIN_RXD1__RXD1
  62 };
  63
  64 static inline void __init mxc_init_imx_uart(void)
  65 {
  66         mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
  67                         "uart-0");
  68         imx31_add_imx_uart0(&uart_pdata);
  69 }
  70
  71 static struct resource dnet_resources[] = {
  72         {
  73                 .name   = "dnet-memory",
  74                 .start  = QONG_DNET_BASEADDR,
  75                 .end    = QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
  76                 .flags  = IORESOURCE_MEM,
  77         }, {
  78                 /* irq number is run-time assigned */
  79                 .flags  = IORESOURCE_IRQ,
  80         },
  81 };
  82
  83 static struct platform_device dnet_device = {
  84         .name                   = "dnet",
  85         .id                     = -1,
  86         .num_resources          = ARRAY_SIZE(dnet_resources),
  87         .resource               = dnet_resources,
  88 };
  89
  90 static int __init qong_init_dnet(void)
  91 {
  92         int ret;
  93
  94         dnet_resources[1].start =
  95                 gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
  96         dnet_resources[1].end =
  97                 gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
  98         ret = platform_device_register(&dnet_device);
  99         return ret;
 100 }
 101
 102 /* MTD NOR flash */
 103
 104 static struct physmap_flash_data qong_flash_data = {
 105         .width = 2,
 106 };
 107
 108 static struct resource qong_flash_resource = {
 109         .start = MX31_CS0_BASE_ADDR,
 110         .end = MX31_CS0_BASE_ADDR + SZ_128M - 1,
 111         .flags = IORESOURCE_MEM,
 112 };
 113
 114 static struct platform_device qong_nor_mtd_device = {
 115         .name = "physmap-flash",
 116         .id = 0,
 117         .dev = {
 118                 .platform_data = &qong_flash_data,
 119                 },
 120         .resource = &qong_flash_resource,
 121         .num_resources = 1,
 122 };
 123
 124 static void qong_init_nor_mtd(void)
 125 {
 126         (void)platform_device_register(&qong_nor_mtd_device);
 127 }
 128
 129 /*
 130  * Hardware specific access to control-lines
 131  */
 132 static void qong_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 133 {
 134         struct nand_chip *nand_chip = mtd->priv;
 135
 136         if (cmd == NAND_CMD_NONE)
 137                 return;
 138
 139         if (ctrl & NAND_CLE)
 140                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 24));
 141         else
 142                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 23));
 143 }
 144
 145 /*
 146  * Read the Device Ready pin.
 147  */
 148 static int qong_nand_device_ready(struct mtd_info *mtd)
 149 {
 150         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 151 }
 152
 153 static void qong_nand_select_chip(struct mtd_info *mtd, int chip)
 154 {
 155         if (chip >= 0)
 156                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 157         else
 158                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 1);
 159 }
 160
 161 static struct platform_nand_data qong_nand_data = {
 162         .chip = {
 163                 .nr_chips               = 1,
 164                 .chip_delay             = 20,
 165                 .options                = 0,
 166         },
 167         .ctrl = {
 168                 .cmd_ctrl               = qong_nand_cmd_ctrl,
 169                 .dev_ready              = qong_nand_device_ready,
 170                 .select_chip            = qong_nand_select_chip,
 171         }
 172 };
 173
 174 static struct resource qong_nand_resource = {
 175         .start          = MX31_CS3_BASE_ADDR,
 176         .end            = MX31_CS3_BASE_ADDR + SZ_32M - 1,
 177         .flags          = IORESOURCE_MEM,
 178 };
 179
 180 static struct platform_device qong_nand_device = {
 181         .name           = "gen_nand",
 182         .id             = -1,
 183         .dev            = {
 184                 .platform_data = &qong_nand_data,
 185         },
 186         .num_resources  = 1,
 187         .resource       = &qong_nand_resource,
 188 };
 189
 190 static void __init qong_init_nand_mtd(void)
 191 {
 192         /* init CS */
 193         __raw_writel(0x00004f00, MX31_IO_ADDRESS(MX31_WEIM_CSCRxU(3)));
 194         __raw_writel(0x20013b31, MX31_IO_ADDRESS(MX31_WEIM_CSCRxL(3)));
 195         __raw_writel(0x00020800, MX31_IO_ADDRESS(MX31_WEIM_CSCRxA(3)));
 196
 197         mxc_iomux_set_gpr(MUX_SDCTL_CSD1_SEL, true);
 198
 199         /* enable pin */
 200         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFCE_B, IOMUX_CONFIG_GPIO));
 201         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), "nand_enable"))
 202                 gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 203
 204         /* ready/busy pin */
 205         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFRB, IOMUX_CONFIG_GPIO));
 206         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFRB), "nand_rdy"))
 207                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 208
 209         /* write protect pin */
 210         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFWP_B, IOMUX_CONFIG_GPIO));
 211         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFWP_B), "nand_wp"))
 212                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFWP_B));
 213
 214         platform_device_register(&qong_nand_device);
 215 }
 216
 217 static void __init qong_init_fpga(void)
 218 {
 219         void __iomem *regs;
 220         u32 fpga_ver;
 221
 222         regs = ioremap(QONG_FPGA_CTRL_BASEADDR, QONG_FPGA_CTRL_SIZE);
 223         if (!regs) {
 224                 printk(KERN_ERR "%s: failed to map registers, aborting.\n",
 225                                 __func__);
 226                 return;
 227         }
 228
 229         fpga_ver = readl(regs + QONG_FPGA_CTRL_VERSION);
 230         iounmap(regs);
 231         printk(KERN_INFO "Qong FPGA version %d.%d.%d\n",
 232                         (fpga_ver & 0xF000) >> 12,
 233                         (fpga_ver & 0x0F00) >> 8, fpga_ver & 0x00FF);
 234         if (fpga_ver < QONG_FPGA_VERSION(0, 8, 7)) {
 235                 printk(KERN_ERR "qong: Unexpected FPGA version, FPGA-based "
 236                                 "devices won't be registered!\n");
 237                 return;
 238         }
 239
 240         /* register FPGA-based devices */
 241         qong_init_nand_mtd();
 242         qong_init_dnet();
 243 }
 244
 245 /*
 246  * Board specific initialization.
 247  */
 248 static void __init qong_init(void)
 249 {
 250         imx31_soc_init();
 251
 252         mxc_init_imx_uart();
 253         qong_init_nor_mtd();
 254         qong_init_fpga();
 255         imx31_add_imx2_wdt();
 256 }
 257
 258 static void __init qong_timer_init(void)
 259 {
 260         mx31_clocks_init(26000000);
 261 }
 262
 263 MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
 264         /* Maintainer: DENX Software Engineering GmbH */
 265         .atag_offset = 0x100,
 266         .map_io = mx31_map_io,
 267         .init_early = imx31_init_early,
 268         .init_irq = mx31_init_irq,
 269         .init_time      = qong_timer_init,
 270         .init_machine = qong_init,
 271         .restart        = mxc_restart,
 272 MACHINE_END