arch/arm/mach-ep93xx/snappercl15.c

   1 /*
   2  * arch/arm/mach-ep93xx/snappercl15.c
   3  * Bluewater Systems Snapper CL15 system module
   4  *
   5  * Copyright (C) 2009 Bluewater Systems Ltd
   6  * Author: Ryan Mallon
   7  *
   8  * NAND code adapted from driver by:
   9  *   Andre Renaud <andre@bluewatersys.com>
  10  *   James R. McKaskill
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or (at
  15  * your option) any later version.
  16  *
  17  */
  18
  19 #include <linux/platform_device.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/io.h>
  23 #include <linux/i2c.h>
  24 #include <linux/i2c-gpio.h>
  25 #include <linux/fb.h>
  26
  27 #include <linux/mtd/partitions.h>
  28 #include <linux/mtd/nand.h>
  29
  30 #include <mach/hardware.h>
  31 #include <mach/fb.h>
  32 #include <mach/gpio-ep93xx.h>
  33
  34 #include <asm/hardware/vic.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37
  38 #include "soc.h"
  39
  40 #define SNAPPERCL15_NAND_BASE   (EP93XX_CS7_PHYS_BASE + SZ_16M)
  41
  42 #define SNAPPERCL15_NAND_WPN    (1 << 8)  /* Write protect (active low) */
  43 #define SNAPPERCL15_NAND_ALE    (1 << 9)  /* Address latch */
  44 #define SNAPPERCL15_NAND_CLE    (1 << 10) /* Command latch */
  45 #define SNAPPERCL15_NAND_CEN    (1 << 11) /* Chip enable (active low) */
  46 #define SNAPPERCL15_NAND_RDY    (1 << 14) /* Device ready */
  47
  48 #define NAND_CTRL_ADDR(chip)    (chip->IO_ADDR_W + 0x40)
  49
  50 static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
  51                                       unsigned int ctrl)
  52 {
  53         struct nand_chip *chip = mtd->priv;
  54         static u16 nand_state = SNAPPERCL15_NAND_WPN;
  55         u16 set;
  56
  57         if (ctrl & NAND_CTRL_CHANGE) {
  58                 set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
  59
  60                 if (ctrl & NAND_NCE)
  61                         set &= ~SNAPPERCL15_NAND_CEN;
  62                 if (ctrl & NAND_CLE)
  63                         set |= SNAPPERCL15_NAND_CLE;
  64                 if (ctrl & NAND_ALE)
  65                         set |= SNAPPERCL15_NAND_ALE;
  66
  67                 nand_state &= ~(SNAPPERCL15_NAND_CEN |
  68                                 SNAPPERCL15_NAND_CLE |
  69                                 SNAPPERCL15_NAND_ALE);
  70                 nand_state |= set;
  71                 __raw_writew(nand_state, NAND_CTRL_ADDR(chip));
  72         }
  73
  74         if (cmd != NAND_CMD_NONE)
  75                 __raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
  76 }
  77
  78 static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
  79 {
  80         struct nand_chip *chip = mtd->priv;
  81
  82         return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
  83 }
  84
  85 static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
  86
  87 static struct mtd_partition snappercl15_nand_parts[] = {
  88         {
  89                 .name           = "Kernel",
  90                 .offset         = 0,
  91                 .size           = SZ_2M,
  92         },
  93         {
  94                 .name           = "Filesystem",
  95                 .offset         = MTDPART_OFS_APPEND,
  96                 .size           = MTDPART_SIZ_FULL,
  97         },
  98 };
  99
 100 static struct platform_nand_data snappercl15_nand_data = {
 101         .chip = {
 102                 .nr_chips               = 1,
 103                 .part_probe_types       = snappercl15_nand_part_probes,
 104                 .partitions             = snappercl15_nand_parts,
 105                 .nr_partitions          = ARRAY_SIZE(snappercl15_nand_parts),
 106                 .options                = NAND_NO_AUTOINCR,
 107                 .chip_delay             = 25,
 108         },
 109         .ctrl = {
 110                 .dev_ready              = snappercl15_nand_dev_ready,
 111                 .cmd_ctrl               = snappercl15_nand_cmd_ctrl,
 112         },
 113 };
 114
 115 static struct resource snappercl15_nand_resource[] = {
 116         {
 117                 .start          = SNAPPERCL15_NAND_BASE,
 118                 .end            = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
 119                 .flags          = IORESOURCE_MEM,
 120         },
 121 };
 122
 123 static struct platform_device snappercl15_nand_device = {
 124         .name                   = "gen_nand",
 125         .id                     = -1,
 126         .dev.platform_data      = &snappercl15_nand_data,
 127         .resource               = snappercl15_nand_resource,
 128         .num_resources          = ARRAY_SIZE(snappercl15_nand_resource),
 129 };
 130
 131 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
 132         .phy_id                 = 1,
 133 };
 134
 135 static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
 136         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 137         .sda_is_open_drain      = 0,
 138         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 139         .scl_is_open_drain      = 0,
 140         .udelay                 = 0,
 141         .timeout                = 0,
 142 };
 143
 144 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
 145         {
 146                 /* Audio codec */
 147                 I2C_BOARD_INFO("tlv320aic23", 0x1a),
 148         },
 149 };
 150
 151 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
 152         .num_modes              = EP93XXFB_USE_MODEDB,
 153         .bpp                    = 16,
 154 };
 155
 156 static struct platform_device snappercl15_audio_device = {
 157         .name           = "snappercl15-audio",
 158         .id             = -1,
 159 };
 160
 161 static void __init snappercl15_register_audio(void)
 162 {
 163         ep93xx_register_i2s();
 164         platform_device_register(&snappercl15_audio_device);
 165 }
 166
 167 static void __init snappercl15_init_machine(void)
 168 {
 169         ep93xx_init_devices();
 170         ep93xx_register_eth(&snappercl15_eth_data, 1);
 171         ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
 172                             ARRAY_SIZE(snappercl15_i2c_data));
 173         ep93xx_register_fb(&snappercl15_fb_info);
 174         snappercl15_register_audio();
 175         platform_device_register(&snappercl15_nand_device);
 176 }
 177
 178 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
 179         /* Maintainer: Ryan Mallon */
 180         .atag_offset    = 0x100,
 181         .map_io         = ep93xx_map_io,
 182         .init_irq       = ep93xx_init_irq,
 183         .handle_irq     = vic_handle_irq,
 184         .timer          = &ep93xx_timer,
 185         .init_machine   = snappercl15_init_machine,
 186         .init_late      = ep93xx_init_late,
 187         .restart        = ep93xx_restart,
 188 MACHINE_END