arch/arm/mach-mx3/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  * 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/kernel.h>
  22 #include <linux/memory.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/mtd/physmap.h>
  25 #include <linux/mtd/nand.h>
  26 #include <linux/gpio.h>
  27
  28 #include <mach/hardware.h>
  29 #include <mach/irqs.h>
  30 #include <asm/mach-types.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/time.h>
  33 #include <asm/mach/map.h>
  34 #include <mach/common.h>
  35 #include <asm/page.h>
  36 #include <asm/setup.h>
  37 #include <mach/board-qong.h>
  38 #include <mach/imx-uart.h>
  39 #include <mach/iomux-mx3.h>
  40 #include "devices.h"
  41
  42 /* FPGA defines */
  43 #define QONG_FPGA_VERSION(major, minor, rev)    \
  44         (((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))
  45
  46 #define QONG_FPGA_BASEADDR              CS1_BASE_ADDR
  47 #define QONG_FPGA_PERIPH_SIZE           (1 << 24)
  48
  49 #define QONG_FPGA_CTRL_BASEADDR         QONG_FPGA_BASEADDR
  50 #define QONG_FPGA_CTRL_SIZE             0x10
  51 /* FPGA control registers */
  52 #define QONG_FPGA_CTRL_VERSION          0x00
  53
  54 #define QONG_DNET_ID            1
  55 #define QONG_DNET_BASEADDR      \
  56         (QONG_FPGA_BASEADDR + QONG_DNET_ID * QONG_FPGA_PERIPH_SIZE)
  57 #define QONG_DNET_SIZE          0x00001000
  58
  59 #define QONG_FPGA_IRQ           IOMUX_TO_IRQ(MX31_PIN_DTR_DCE1)
  60
  61 /*
  62  * This file contains the board-specific initialization routines.
  63  */
  64
  65 static struct imxuart_platform_data uart_pdata = {
  66         .flags = IMXUART_HAVE_RTSCTS,
  67 };
  68
  69 static int uart_pins[] = {
  70         MX31_PIN_CTS1__CTS1,
  71         MX31_PIN_RTS1__RTS1,
  72         MX31_PIN_TXD1__TXD1,
  73         MX31_PIN_RXD1__RXD1
  74 };
  75
  76 static inline void mxc_init_imx_uart(void)
  77 {
  78         mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
  79                         "uart-0");
  80         mxc_register_device(&mxc_uart_device0, &uart_pdata);
  81 }
  82
  83 static struct resource dnet_resources[] = {
  84         [0] = {
  85                 .name   = "dnet-memory",
  86                 .start  = QONG_DNET_BASEADDR,
  87                 .end    = QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
  88                 .flags  = IORESOURCE_MEM,
  89         },
  90         [1] = {
  91                 .start  = QONG_FPGA_IRQ,
  92                 .end    = QONG_FPGA_IRQ,
  93                 .flags  = IORESOURCE_IRQ,
  94         },
  95 };
  96
  97 static struct platform_device dnet_device = {
  98         .name                   = "dnet",
  99         .id                     = -1,
 100         .num_resources          = ARRAY_SIZE(dnet_resources),
 101         .resource               = dnet_resources,
 102 };
 103
 104 static int __init qong_init_dnet(void)
 105 {
 106         int ret;
 107
 108         ret = platform_device_register(&dnet_device);
 109         return ret;
 110 }
 111
 112 /* MTD NOR flash */
 113
 114 static struct physmap_flash_data qong_flash_data = {
 115         .width = 2,
 116 };
 117
 118 static struct resource qong_flash_resource = {
 119         .start = CS0_BASE_ADDR,
 120         .end = CS0_BASE_ADDR + QONG_NOR_SIZE - 1,
 121         .flags = IORESOURCE_MEM,
 122 };
 123
 124 static struct platform_device qong_nor_mtd_device = {
 125         .name = "physmap-flash",
 126         .id = 0,
 127         .dev = {
 128                 .platform_data = &qong_flash_data,
 129                 },
 130         .resource = &qong_flash_resource,
 131         .num_resources = 1,
 132 };
 133
 134 static void qong_init_nor_mtd(void)
 135 {
 136         (void)platform_device_register(&qong_nor_mtd_device);
 137 }
 138
 139 /*
 140  * Hardware specific access to control-lines
 141  */
 142 static void qong_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 143 {
 144         struct nand_chip *nand_chip = mtd->priv;
 145
 146         if (cmd == NAND_CMD_NONE)
 147                 return;
 148
 149         if (ctrl & NAND_CLE)
 150                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 24));
 151         else
 152                 writeb(cmd, nand_chip->IO_ADDR_W + (1 << 23));
 153 }
 154
 155 /*
 156  * Read the Device Ready pin.
 157  */
 158 static int qong_nand_device_ready(struct mtd_info *mtd)
 159 {
 160         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 161 }
 162
 163 static void qong_nand_select_chip(struct mtd_info *mtd, int chip)
 164 {
 165         if (chip >= 0)
 166                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 167         else
 168                 gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 1);
 169 }
 170
 171 static struct platform_nand_data qong_nand_data = {
 172         .chip = {
 173                 .chip_delay             = 20,
 174                 .options                = 0,
 175         },
 176         .ctrl = {
 177                 .cmd_ctrl               = qong_nand_cmd_ctrl,
 178                 .dev_ready              = qong_nand_device_ready,
 179                 .select_chip            = qong_nand_select_chip,
 180         }
 181 };
 182
 183 static struct resource qong_nand_resource = {
 184         .start          = CS3_BASE_ADDR,
 185         .end            = CS3_BASE_ADDR + SZ_32M - 1,
 186         .flags          = IORESOURCE_MEM,
 187 };
 188
 189 static struct platform_device qong_nand_device = {
 190         .name           = "gen_nand",
 191         .id             = -1,
 192         .dev            = {
 193                 .platform_data = &qong_nand_data,
 194         },
 195         .num_resources  = 1,
 196         .resource       = &qong_nand_resource,
 197 };
 198
 199 static void __init qong_init_nand_mtd(void)
 200 {
 201         /* init CS */
 202         __raw_writel(0x00004f00, CSCR_U(3));
 203         __raw_writel(0x20013b31, CSCR_L(3));
 204         __raw_writel(0x00020800, CSCR_A(3));
 205         mxc_iomux_set_gpr(MUX_SDCTL_CSD1_SEL, true);
 206
 207         /* enable pin */
 208         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFCE_B, IOMUX_CONFIG_GPIO));
 209         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), "nand_enable"))
 210                 gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
 211
 212         /* ready/busy pin */
 213         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFRB, IOMUX_CONFIG_GPIO));
 214         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFRB), "nand_rdy"))
 215                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFRB));
 216
 217         /* write protect pin */
 218         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFWP_B, IOMUX_CONFIG_GPIO));
 219         if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFWP_B), "nand_wp"))
 220                 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFWP_B));
 221
 222         platform_device_register(&qong_nand_device);
 223 }
 224
 225 static void __init qong_init_fpga(void)
 226 {
 227         void __iomem *regs;
 228         u32 fpga_ver;
 229
 230         regs = ioremap(QONG_FPGA_CTRL_BASEADDR, QONG_FPGA_CTRL_SIZE);
 231         if (!regs) {
 232                 printk(KERN_ERR "%s: failed to map registers, aborting.\n",
 233                                 __func__);
 234                 return;
 235         }
 236
 237         fpga_ver = readl(regs + QONG_FPGA_CTRL_VERSION);
 238         iounmap(regs);
 239         printk(KERN_INFO "Qong FPGA version %d.%d.%d\n",
 240                         (fpga_ver & 0xF000) >> 12,
 241                         (fpga_ver & 0x0F00) >> 8, fpga_ver & 0x00FF);
 242         if (fpga_ver < QONG_FPGA_VERSION(0, 8, 7)) {
 243                 printk(KERN_ERR "qong: Unexpected FPGA version, FPGA-based "
 244                                 "devices won't be registered!\n");
 245                 return;
 246         }
 247
 248         /* register FPGA-based devices */
 249         qong_init_nand_mtd();
 250         qong_init_dnet();
 251 }
 252
 253 /*
 254  * Board specific initialization.
 255  */
 256 static void __init mxc_board_init(void)
 257 {
 258         mxc_init_imx_uart();
 259         qong_init_nor_mtd();
 260         qong_init_fpga();
 261 }
 262
 263 static void __init qong_timer_init(void)
 264 {
 265         mx31_clocks_init(26000000);
 266 }
 267
 268 static struct sys_timer qong_timer = {
 269         .init   = qong_timer_init,
 270 };
 271
 272 /*
 273  * The following uses standard kernel macros defined in arch.h in order to
 274  * initialize __mach_desc_QONG data structure.
 275  */
 276
 277 MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
 278         /* Maintainer: DENX Software Engineering GmbH */
 279         .phys_io        = AIPS1_BASE_ADDR,
 280         .io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 281         .boot_params    = PHYS_OFFSET + 0x100,
 282         .map_io         = mx31_map_io,
 283         .init_irq       = mxc_init_irq,
 284         .init_machine   = mxc_board_init,
 285         .timer          = &qong_timer,
 286 MACHINE_END