linux/arch/arm/mach-sa1100/h3xxx.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
   4 *
   5 * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
   6 * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/gpio/machine.h>
  11#include <linux/gpio.h>
  12#include <linux/gpio_keys.h>
  13#include <linux/input.h>
  14#include <linux/mtd/mtd.h>
  15#include <linux/mtd/partitions.h>
  16#include <linux/platform_data/gpio-htc-egpio.h>
  17#include <linux/platform_data/sa11x0-serial.h>
  18#include <linux/platform_device.h>
  19#include <linux/serial_core.h>
  20
  21#include <asm/mach/flash.h>
  22#include <asm/mach/map.h>
  23
  24#include <mach/h3xxx.h>
  25#include <mach/irqs.h>
  26
  27#include "generic.h"
  28
  29/*
  30 * H3xxx flash support
  31 */
  32static struct mtd_partition h3xxx_partitions[] = {
  33        {
  34                .name           = "H3XXX boot firmware",
  35                .size           = 0x00040000,
  36                .offset         = 0,
  37                .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  38        }, {
  39                .name           = "H3XXX rootfs",
  40                .size           = MTDPART_SIZ_FULL,
  41                .offset         = 0x00040000,
  42        }
  43};
  44
  45static void h3xxx_set_vpp(int vpp)
  46{
  47        gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
  48}
  49
  50static int h3xxx_flash_init(void)
  51{
  52        int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
  53        if (err) {
  54                pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
  55                return err;
  56        }
  57
  58        err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
  59        if (err)
  60                gpio_free(H3XXX_EGPIO_VPP_ON);
  61
  62        return err;
  63}
  64
  65static void h3xxx_flash_exit(void)
  66{
  67        gpio_free(H3XXX_EGPIO_VPP_ON);
  68}
  69
  70static struct flash_platform_data h3xxx_flash_data = {
  71        .map_name       = "cfi_probe",
  72        .set_vpp        = h3xxx_set_vpp,
  73        .init           = h3xxx_flash_init,
  74        .exit           = h3xxx_flash_exit,
  75        .parts          = h3xxx_partitions,
  76        .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
  77};
  78
  79static struct resource h3xxx_flash_resource =
  80        DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
  81
  82
  83/*
  84 * H3xxx uart support
  85 */
  86static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
  87{
  88        if (port->mapbase == _Ser3UTCR0) {
  89                if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
  90                        gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
  91                        gpio_free(H3XXX_EGPIO_RS232_ON);
  92                } else {
  93                        pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
  94                                __func__);
  95                }
  96        }
  97}
  98
  99/*
 100 * Enable/Disable wake up events for this serial port.
 101 * Obviously, we only support this on the normal COM port.
 102 */
 103static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 104{
 105        int err = -EINVAL;
 106
 107        if (port->mapbase == _Ser3UTCR0) {
 108                if (enable)
 109                        PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 110                else
 111                        PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 112                err = 0;
 113        }
 114        return err;
 115}
 116
 117static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 118        .pm             = h3xxx_uart_pm,
 119        .set_wake       = h3xxx_uart_set_wake,
 120};
 121
 122static struct gpiod_lookup_table h3xxx_uart3_gpio_table = {
 123        .dev_id = "sa11x0-uart.3",
 124        .table = {
 125                GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_DCD, "dcd", GPIO_ACTIVE_LOW),
 126                GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_CTS, "cts", GPIO_ACTIVE_LOW),
 127                GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_RTS, "rts", GPIO_ACTIVE_LOW),
 128                { },
 129        },
 130};
 131
 132/*
 133 * EGPIO
 134 */
 135
 136static struct resource egpio_resources[] = {
 137        [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
 138};
 139
 140static struct htc_egpio_chip egpio_chips[] = {
 141        [0] = {
 142                .reg_start      = 0,
 143                .gpio_base      = H3XXX_EGPIO_BASE,
 144                .num_gpios      = 16,
 145                .direction      = HTC_EGPIO_OUTPUT,
 146                .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 147        },
 148};
 149
 150static struct htc_egpio_platform_data egpio_info = {
 151        .reg_width      = 16,
 152        .bus_width      = 16,
 153        .chip           = egpio_chips,
 154        .num_chips      = ARRAY_SIZE(egpio_chips),
 155};
 156
 157static struct platform_device h3xxx_egpio = {
 158        .name           = "htc-egpio",
 159        .id             = -1,
 160        .resource       = egpio_resources,
 161        .num_resources  = ARRAY_SIZE(egpio_resources),
 162        .dev            = {
 163                .platform_data = &egpio_info,
 164        },
 165};
 166
 167/*
 168 * GPIO keys
 169 */
 170
 171static struct gpio_keys_button h3xxx_button_table[] = {
 172        {
 173                .code           = KEY_POWER,
 174                .gpio           = H3XXX_GPIO_PWR_BUTTON,
 175                .desc           = "Power Button",
 176                .active_low     = 1,
 177                .type           = EV_KEY,
 178                .wakeup         = 1,
 179        }, {
 180                .code           = KEY_ENTER,
 181                .gpio           = H3XXX_GPIO_ACTION_BUTTON,
 182                .active_low     = 1,
 183                .desc           = "Action button",
 184                .type           = EV_KEY,
 185                .wakeup         = 0,
 186        },
 187};
 188
 189static struct gpio_keys_platform_data h3xxx_keys_data = {
 190        .buttons  = h3xxx_button_table,
 191        .nbuttons = ARRAY_SIZE(h3xxx_button_table),
 192};
 193
 194static struct platform_device h3xxx_keys = {
 195        .name   = "gpio-keys",
 196        .id     = -1,
 197        .dev    = {
 198                .platform_data = &h3xxx_keys_data,
 199        },
 200};
 201
 202static struct resource h3xxx_micro_resources[] = {
 203        DEFINE_RES_MEM(0x80010000, SZ_4K),
 204        DEFINE_RES_MEM(0x80020000, SZ_4K),
 205        DEFINE_RES_IRQ(IRQ_Ser1UART),
 206};
 207
 208struct platform_device h3xxx_micro_asic = {
 209        .name = "ipaq-h3xxx-micro",
 210        .id = -1,
 211        .resource = h3xxx_micro_resources,
 212        .num_resources = ARRAY_SIZE(h3xxx_micro_resources),
 213};
 214
 215static struct platform_device *h3xxx_devices[] = {
 216        &h3xxx_egpio,
 217        &h3xxx_keys,
 218        &h3xxx_micro_asic,
 219};
 220
 221static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = {
 222        .dev_id = "sa11x0-pcmcia",
 223        .table = {
 224                GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0,
 225                            "pcmcia0-detect", GPIO_ACTIVE_LOW),
 226                GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0,
 227                            "pcmcia0-ready", GPIO_ACTIVE_HIGH),
 228                GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1,
 229                            "pcmcia1-detect", GPIO_ACTIVE_LOW),
 230                GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1,
 231                            "pcmcia1-ready", GPIO_ACTIVE_HIGH),
 232                { },
 233        },
 234};
 235
 236void __init h3xxx_mach_init(void)
 237{
 238        gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table);
 239        gpiod_add_lookup_table(&h3xxx_uart3_gpio_table);
 240        sa1100_register_uart_fns(&h3xxx_port_fns);
 241        sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 242        platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 243}
 244
 245static struct map_desc h3600_io_desc[] __initdata = {
 246        {       /* static memory bank 2  CS#2 */
 247                .virtual        =  H3600_BANK_2_VIRT,
 248                .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 249                .length         = 0x02800000,
 250                .type           = MT_DEVICE
 251        }, {    /* static memory bank 4  CS#4 */
 252                .virtual        =  H3600_BANK_4_VIRT,
 253                .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 254                .length         = 0x00800000,
 255                .type           = MT_DEVICE
 256        }, {    /* EGPIO 0              CS#5 */
 257                .virtual        =  H3600_EGPIO_VIRT,
 258                .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 259                .length         = 0x01000000,
 260                .type           = MT_DEVICE
 261        }
 262};
 263
 264/*
 265 * Common map_io initialization
 266 */
 267
 268void __init h3xxx_map_io(void)
 269{
 270        sa1100_map_io();
 271        iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 272
 273        sa1100_register_uart(0, 3); /* Common serial port */
 274//      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 275
 276        /* Ensure those pins are outputs and driving low  */
 277        PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 278        PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 279
 280        /* Configure suspend conditions */
 281        PGSR = 0;
 282        PCFR = PCFR_OPDE;
 283        PSDR = 0;
 284
 285        GPCR = 0x0fffffff;      /* All outputs are set low by default */
 286        GPDR = 0;               /* Configure all GPIOs as input */
 287}
 288
 289