arch/arm/mach-imx/mach-kzm_arm11_01.c

   1 /*
   2  * KZM-ARM11-01 support
   3  *  Copyright (C) 2009  Yoichi Yuasa <yuasa@linux-mips.org>
   4  *
   5  * based on code for MX31ADS,
   6  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   7  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
   8  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #include <linux/gpio.h>
  22 #include <linux/init.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/serial_8250.h>
  25 #include <linux/smsc911x.h>
  26 #include <linux/types.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/regulator/fixed.h>
  29
  30 #include <asm/irq.h>
  31 #include <asm/mach-types.h>
  32 #include <asm/memory.h>
  33 #include <asm/setup.h>
  34 #include <asm/mach/arch.h>
  35 #include <asm/mach/irq.h>
  36 #include <asm/mach/map.h>
  37 #include <asm/mach/time.h>
  38
  39 #include "common.h"
  40 #include "devices-imx31.h"
  41 #include "hardware.h"
  42 #include "iomux-mx3.h"
  43
  44 #define KZM_ARM11_IO_ADDRESS(x) (IOMEM(                                 \
  45         IMX_IO_P2V_MODULE(x, MX31_CS4) ?:                               \
  46         IMX_IO_P2V_MODULE(x, MX31_CS5)) ?:                              \
  47         MX31_IO_ADDRESS(x))
  48
  49 /*
  50  *  KZM-ARM11-01 Board Control Registers on FPGA
  51  */
  52 #define KZM_ARM11_CTL1          (MX31_CS4_BASE_ADDR + 0x1000)
  53 #define KZM_ARM11_CTL2          (MX31_CS4_BASE_ADDR + 0x1001)
  54 #define KZM_ARM11_RSW1          (MX31_CS4_BASE_ADDR + 0x1002)
  55 #define KZM_ARM11_BACK_LIGHT    (MX31_CS4_BASE_ADDR + 0x1004)
  56 #define KZM_ARM11_FPGA_REV      (MX31_CS4_BASE_ADDR + 0x1008)
  57 #define KZM_ARM11_7SEG_LED      (MX31_CS4_BASE_ADDR + 0x1010)
  58 #define KZM_ARM11_LEDS          (MX31_CS4_BASE_ADDR + 0x1020)
  59 #define KZM_ARM11_DIPSW2        (MX31_CS4_BASE_ADDR + 0x1003)
  60
  61 /*
  62  * External UART for touch panel on FPGA
  63  */
  64 #define KZM_ARM11_16550         (MX31_CS4_BASE_ADDR + 0x1050)
  65
  66 #if IS_ENABLED(CONFIG_SERIAL_8250)
  67 /*
  68  * KZM-ARM11-01 has an external UART on FPGA
  69  */
  70 static struct plat_serial8250_port serial_platform_data[] = {
  71         {
  72                 .membase        = KZM_ARM11_IO_ADDRESS(KZM_ARM11_16550),
  73                 .mapbase        = KZM_ARM11_16550,
  74                 /* irq number is run-time assigned */
  75                 .irqflags       = IRQ_TYPE_EDGE_RISING,
  76                 .uartclk        = 14745600,
  77                 .regshift       = 0,
  78                 .iotype         = UPIO_MEM,
  79                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
  80                                   UPF_BUGGY_UART,
  81         },
  82         {},
  83 };
  84
  85 static struct resource serial8250_resources[] = {
  86         {
  87                 .start  = KZM_ARM11_16550,
  88                 .end    = KZM_ARM11_16550 + 0x10,
  89                 .flags  = IORESOURCE_MEM,
  90         },
  91         {
  92                 /* irq number is run-time assigned */
  93                 .flags  = IORESOURCE_IRQ,
  94         },
  95 };
  96
  97 static struct platform_device serial_device = {
  98         .name           = "serial8250",
  99         .id             = PLAT8250_DEV_PLATFORM,
 100         .dev            = {
 101                                 .platform_data = serial_platform_data,
 102                           },
 103         .num_resources  = ARRAY_SIZE(serial8250_resources),
 104         .resource       = serial8250_resources,
 105 };
 106
 107 static int __init kzm_init_ext_uart(void)
 108 {
 109         u8 tmp;
 110
 111         /*
 112          * GPIO 1-1: external UART interrupt line
 113          */
 114         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO));
 115         gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "ext-uart-int");
 116         gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
 117
 118         /*
 119          * Unmask UART interrupt
 120          */
 121         tmp = __raw_readb(KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));
 122         tmp |= 0x2;
 123         __raw_writeb(tmp, KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));
 124
 125         serial_platform_data[0].irq =
 126                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
 127         serial8250_resources[1].start =
 128                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
 129         serial8250_resources[1].end =
 130                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
 131
 132         return platform_device_register(&serial_device);
 133 }
 134 #else
 135 static inline int kzm_init_ext_uart(void)
 136 {
 137         return 0;
 138 }
 139 #endif
 140
 141 /*
 142  * SMSC LAN9118
 143  */
 144 #if IS_ENABLED(CONFIG_SMSC911X)
 145 static struct smsc911x_platform_config kzm_smsc9118_config = {
 146         .phy_interface  = PHY_INTERFACE_MODE_MII,
 147         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
 148         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
 149         .flags          = SMSC911X_USE_32BIT | SMSC911X_SAVE_MAC_ADDRESS,
 150 };
 151
 152 static struct resource kzm_smsc9118_resources[] = {
 153         {
 154                 .start  = MX31_CS5_BASE_ADDR,
 155                 .end    = MX31_CS5_BASE_ADDR + SZ_128K - 1,
 156                 .flags  = IORESOURCE_MEM,
 157         },
 158         {
 159                 /* irq number is run-time assigned */
 160                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 161         },
 162 };
 163
 164 static struct platform_device kzm_smsc9118_device = {
 165         .name           = "smsc911x",
 166         .id             = -1,
 167         .num_resources  = ARRAY_SIZE(kzm_smsc9118_resources),
 168         .resource       = kzm_smsc9118_resources,
 169         .dev            = {
 170                                 .platform_data = &kzm_smsc9118_config,
 171                           },
 172 };
 173
 174 static struct regulator_consumer_supply dummy_supplies[] = {
 175         REGULATOR_SUPPLY("vdd33a", "smsc911x"),
 176         REGULATOR_SUPPLY("vddvario", "smsc911x"),
 177 };
 178
 179 static int __init kzm_init_smsc9118(void)
 180 {
 181         /*
 182          * GPIO 1-2: SMSC9118 interrupt line
 183          */
 184         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_2, IOMUX_CONFIG_GPIO));
 185         gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2), "smsc9118-int");
 186         gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
 187
 188         regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
 189
 190         kzm_smsc9118_resources[1].start =
 191                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
 192         kzm_smsc9118_resources[1].end =
 193                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
 194
 195         return platform_device_register(&kzm_smsc9118_device);
 196 }
 197 #else
 198 static inline int kzm_init_smsc9118(void)
 199 {
 200         return 0;
 201 }
 202 #endif
 203
 204 #if IS_ENABLED(CONFIG_SERIAL_IMX)
 205 static const struct imxuart_platform_data uart_pdata __initconst = {
 206         .flags = IMXUART_HAVE_RTSCTS,
 207 };
 208
 209 static void __init kzm_init_imx_uart(void)
 210 {
 211         imx31_add_imx_uart0(&uart_pdata);
 212         imx31_add_imx_uart1(&uart_pdata);
 213 }
 214 #else
 215 static inline void kzm_init_imx_uart(void)
 216 {
 217 }
 218 #endif
 219
 220 static int kzm_pins[] __initdata = {
 221         MX31_PIN_CTS1__CTS1,
 222         MX31_PIN_RTS1__RTS1,
 223         MX31_PIN_TXD1__TXD1,
 224         MX31_PIN_RXD1__RXD1,
 225         MX31_PIN_DCD_DCE1__DCD_DCE1,
 226         MX31_PIN_RI_DCE1__RI_DCE1,
 227         MX31_PIN_DSR_DCE1__DSR_DCE1,
 228         MX31_PIN_DTR_DCE1__DTR_DCE1,
 229         MX31_PIN_CTS2__CTS2,
 230         MX31_PIN_RTS2__RTS2,
 231         MX31_PIN_TXD2__TXD2,
 232         MX31_PIN_RXD2__RXD2,
 233         MX31_PIN_DCD_DTE1__DCD_DTE2,
 234         MX31_PIN_RI_DTE1__RI_DTE2,
 235         MX31_PIN_DSR_DTE1__DSR_DTE2,
 236         MX31_PIN_DTR_DTE1__DTR_DTE2,
 237 };
 238
 239 /*
 240  * Board specific initialization.
 241  */
 242 static void __init kzm_board_init(void)
 243 {
 244         imx31_soc_init();
 245
 246         mxc_iomux_setup_multiple_pins(kzm_pins,
 247                                       ARRAY_SIZE(kzm_pins), "kzm");
 248         kzm_init_imx_uart();
 249
 250         pr_info("Clock input source is 26MHz\n");
 251 }
 252
 253 static void __init kzm_late_init(void)
 254 {
 255         kzm_init_ext_uart();
 256         kzm_init_smsc9118();
 257 }
 258
 259 /*
 260  * This structure defines static mappings for the kzm-arm11-01 board.
 261  */
 262 static struct map_desc kzm_io_desc[] __initdata = {
 263         {
 264                 .virtual        = (unsigned long)MX31_CS4_BASE_ADDR_VIRT,
 265                 .pfn            = __phys_to_pfn(MX31_CS4_BASE_ADDR),
 266                 .length         = MX31_CS4_SIZE,
 267                 .type           = MT_DEVICE
 268         },
 269         {
 270                 .virtual        = (unsigned long)MX31_CS5_BASE_ADDR_VIRT,
 271                 .pfn            = __phys_to_pfn(MX31_CS5_BASE_ADDR),
 272                 .length         = MX31_CS5_SIZE,
 273                 .type           = MT_DEVICE
 274         },
 275 };
 276
 277 /*
 278  * Set up static virtual mappings.
 279  */
 280 static void __init kzm_map_io(void)
 281 {
 282         mx31_map_io();
 283         iotable_init(kzm_io_desc, ARRAY_SIZE(kzm_io_desc));
 284 }
 285
 286 static void __init kzm_timer_init(void)
 287 {
 288         mx31_clocks_init(26000000);
 289 }
 290
 291 MACHINE_START(KZM_ARM11_01, "Kyoto Microcomputer Co., Ltd. KZM-ARM11-01")
 292         .atag_offset = 0x100,
 293         .map_io = kzm_map_io,
 294         .init_early = imx31_init_early,
 295         .init_irq = mx31_init_irq,
 296         .init_time      = kzm_timer_init,
 297         .init_machine = kzm_board_init,
 298         .init_late      = kzm_late_init,
 299         .restart        = mxc_restart,
 300 MACHINE_END