arch/arm/mach-mx3/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 <mach/hardware.h>
  25 #include <mach/irqs.h>
  26 #include <asm/mach-types.h>
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/time.h>
  29 #include <asm/mach/map.h>
  30 #include <mach/common.h>
  31 #include <asm/page.h>
  32 #include <asm/setup.h>
  33 #include <mach/iomux-mx3.h>
  34
  35 #include "devices-imx31.h"
  36 #include "devices.h"
  37
  38 /* FPGA defines */
  39 #define QONG_FPGA_VERSION(major, minor, rev)    \
  40         (((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))
  41
  42 #define QONG_FPGA_BASEADDR              MX31_CS1_BASE_ADDR
  43 #define QONG_FPGA_PERIPH_SIZE           (1 << 24)
  44
  45 #define QONG_FPGA_CTRL_BASEADDR         QONG_FPGA_BASEADDR
  46 #define QONG_FPGA_CTRL_SIZE             0x10
  47 /* FPGA control registers */
  48 #define QONG_FPGA_CTRL_VERSION          0x00
  49
  50 #define QONG_DNET_ID            1
  51 #define QONG_DNET_BASEADDR      \
  52         (QONG_FPGA_BASEADDR + QONG_DNET_ID * QONG_FPGA_PERIPH_SIZE)
  53 #define QONG_DNET_SIZE          0x00001000
  54
  55 #define QONG_FPGA_IRQ           IOMUX_TO_IRQ(MX31_PIN_DTR_DCE1)
  56
  57 /*
  58  * This file contains the board-specific initialization routines.
  59  */
  60
  61 static const struct imxuart_platform_data uart_pdata __initconst = {
  62         .flags = IMXUART_HAVE_RTSCTS,
  63 };
  64
  65 static int uart_pins[] = {
  66         MX31_PIN_CTS1__CTS1,
  67         MX31_PIN_RTS1__RTS1,
  68         MX31_PIN_TXD1__TXD1,
  69         MX31_PIN_RXD1__RXD1
  70 };
  71
  72 static inline void __init mxc_init_imx_uart(void)
  73 {
  74         mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
  75                         "uart-0");
  76         imx31_add_imx_uart0(&uart_pdata);
  77 }
  78
  79 static struct resource dnet_resources[] = {
  80         {
  81                 .name   = "dnet-memory",
  82                 .start  = QONG_DNET_BASEADDR,
  83                 .end    = QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
  84                 .flags  = IORESOURCE_MEM,
  85         }, {
  86                 .start  = QONG_FPGA_IRQ,
  87                 .end    = QONG_FPGA_IRQ,
  88                 .flags  = IORESOURCE_IRQ,
  89         },
  90 };
  91
  92 static struct platform_device dnet_device = {
  93         .name                   = "dnet",
  94         .id                     = -1,
  95         .num_resources          = ARRAY_SIZE(dnet_resources),
  96         .resource               = dnet_resources,
  97 };
  98
  99 static int __init qong_init_dnet(void)
 100 {
 101         int ret;
 102
 103         ret = platform_device_register(&dnet_device);
 104         return ret;
 105 }
 106
 107 /* MTD NOR flash */
 108
 109 static struct physmap_flash_data qong_flash_data = {
 110         .width = 2,
 111 };
 112
 113 static struct resource qong_flash_resource = {
 114         .start = MX31_CS0_BASE_ADDR,
 115         .end = MX31_CS0_BASE_ADDR + SZ_128M - 1,
 116         .flags = IORESOURCE_MEM,
 117 };
 118
 119 static struct platform_device qong_nor_mtd_device = {
 120         .name = "physmap-flash",
 121         .id = 0,
 122         .dev = {
 123                 .platform_data = &qong_flash_data,
 124                 },
 125         .resource = &qong_flash_resource,
 126         .num_resources = 1,
 127 };
 128
 129 static void qong_init_nor_mtd(void)
 130 {
 131         (void)platform_device_register(&qong_nor_mtd_device);
 132 }
 133
 134 /*
 135  * Hardware specific access to control-lines
 136  */
 137 static void qong_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 138 {
 139         struct nand_chip *nand_chip = mtd->priv;
 140
 141         if (cmd == NAND_CMD_NONE)
 142                 return;
 143
 144         if (ctrl & NAND_CLE)
 145                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 24));
 146         else
 147                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 23));
 148 }
 149
 150 /*
 151  * Read the Device Ready pin.
 152  */
 153 static int qong_nand_device_ready(struct mtd_info *mtd)
 154 {
 155         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 156 }
 157
 158 static void qong_nand_select_chip(struct mtd_info *mtd, int chip)
 159 {
 160         if (chip >= 0)
 161                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 162         else
 163                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 1);
 164 }
 165
 166 static struct platform_nand_data qong_nand_data = {
 167         .chip = {
 168                 .nr_chips               = 1,
 169                 .chip_delay             = 20,
 170                 .options                = 0,
 171         },
 172         .ctrl = {
 173                 .cmd_ctrl               = qong_nand_cmd_ctrl,
 174                 .dev_ready              = qong_nand_device_ready,
 175                 .select_chip            = qong_nand_select_chip,
 176         }
 177 };
 178
 179 static struct resource qong_nand_resource = {
 180         .start          = MX31_CS3_BASE_ADDR,
 181         .end            = MX31_CS3_BASE_ADDR + SZ_32M - 1,
 182         .flags          = IORESOURCE_MEM,
 183 };
 184
 185 static struct platform_device qong_nand_device = {
 186         .name           = "gen_nand",
 187         .id             = -1,
 188         .dev            = {
 189                 .platform_data = &qong_nand_data,
 190         },
 191         .num_resources  = 1,
 192         .resource       = &qong_nand_resource,
 193 };
 194
 195 static void __init qong_init_nand_mtd(void)
 196 {
 197         /* init CS */
 198         mx31_setup_weimcs(3, 0x00004f00, 0x20013b31, 0x00020800);
 199         mxc_iomux_set_gpr(MUX_SDCTL_CSD1_SEL, true);
 200
 201         /* enable pin */
 202         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFCE_B, IOMUX_CONFIG_GPIO));
 203         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), "nand_enable"))
 204                 gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 205
 206         /* ready/busy pin */
 207         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFRB, IOMUX_CONFIG_GPIO));
 208         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFRB), "nand_rdy"))
 209                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 210
 211         /* write protect pin */
 212         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFWP_B, IOMUX_CONFIG_GPIO));
 213         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFWP_B), "nand_wp"))
 214                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFWP_B));
 215
 216         platform_device_register(&qong_nand_device);
 217 }
 218
 219 static void __init qong_init_fpga(void)
 220 {
 221         void __iomem *regs;
 222         u32 fpga_ver;
 223
 224         regs = ioremap(QONG_FPGA_CTRL_BASEADDR, QONG_FPGA_CTRL_SIZE);
 225         if (!regs) {
 226                 printk(KERN_ERR "%s: failed to map registers, aborting.\n",
 227                                 __func__);
 228                 return;
 229         }
 230
 231         fpga_ver = readl(regs + QONG_FPGA_CTRL_VERSION);
 232         iounmap(regs);
 233         printk(KERN_INFO "Qong FPGA version %d.%d.%d\n",
 234                         (fpga_ver & 0xF000) >> 12,
 235                         (fpga_ver & 0x0F00) >> 8, fpga_ver & 0x00FF);
 236         if (fpga_ver < QONG_FPGA_VERSION(0, 8, 7)) {
 237                 printk(KERN_ERR "qong: Unexpected FPGA version, FPGA-based "
 238                                 "devices won't be registered!\n");
 239                 return;
 240         }
 241
 242         /* register FPGA-based devices */
 243         qong_init_nand_mtd();
 244         qong_init_dnet();
 245 }
 246
 247 /*
 248  * Board specific initialization.
 249  */
 250 static void __init mxc_board_init(void)
 251 {
 252         mxc_init_imx_uart();
 253         qong_init_nor_mtd();
 254         qong_init_fpga();
 255 }
 256
 257 static void __init qong_timer_init(void)
 258 {
 259         mx31_clocks_init(26000000);
 260 }
 261
 262 static struct sys_timer qong_timer = {
 263         .init   = qong_timer_init,
 264 };
 265
 266 /*
 267  * The following uses standard kernel macros defined in arch.h in order to
 268  * initialize __mach_desc_QONG data structure.
 269  */
 270
 271 MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
 272         /* Maintainer: DENX Software Engineering GmbH */
 273         .boot_params = MX3x_PHYS_OFFSET + 0x100,
 274         .map_io = mx31_map_io,
 275         .init_early = imx31_init_early,
 276         .init_irq = mx31_init_irq,
 277         .timer = &qong_timer,
 278         .init_machine = mxc_board_init,
 279 MACHINE_END