arch/arm/mach-sa1100/h3xxx.c

   1 /*
   2  * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
   3  *
   4  * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
   5  * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/gpio.h>
  15 #include <linux/gpio_keys.h>
  16 #include <linux/input.h>
  17 #include <linux/mfd/htc-egpio.h>
  18 #include <linux/mtd/mtd.h>
  19 #include <linux/mtd/partitions.h>
  20 #include <linux/platform_data/sa11x0-serial.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/serial_core.h>
  23
  24 #include <asm/mach/flash.h>
  25 #include <asm/mach/map.h>
  26
  27 #include <mach/h3xxx.h>
  28 #include <mach/irqs.h>
  29
  30 #include "generic.h"
  31
  32 /*
  33  * H3xxx flash support
  34  */
  35 static struct mtd_partition h3xxx_partitions[] = {
  36         {
  37                 .name           = "H3XXX boot firmware",
  38                 .size           = 0x00040000,
  39                 .offset         = 0,
  40                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  41         }, {
  42                 .name           = "H3XXX rootfs",
  43                 .size           = MTDPART_SIZ_FULL,
  44                 .offset         = 0x00040000,
  45         }
  46 };
  47
  48 static void h3xxx_set_vpp(int vpp)
  49 {
  50         gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
  51 }
  52
  53 static int h3xxx_flash_init(void)
  54 {
  55         int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
  56         if (err) {
  57                 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
  58                 return err;
  59         }
  60
  61         err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
  62         if (err)
  63                 gpio_free(H3XXX_EGPIO_VPP_ON);
  64
  65         return err;
  66 }
  67
  68 static void h3xxx_flash_exit(void)
  69 {
  70         gpio_free(H3XXX_EGPIO_VPP_ON);
  71 }
  72
  73 static struct flash_platform_data h3xxx_flash_data = {
  74         .map_name       = "cfi_probe",
  75         .set_vpp        = h3xxx_set_vpp,
  76         .init           = h3xxx_flash_init,
  77         .exit           = h3xxx_flash_exit,
  78         .parts          = h3xxx_partitions,
  79         .nr_parts       = ARRAY_SIZE(h3xxx_partitions),
  80 };
  81
  82 static struct resource h3xxx_flash_resource =
  83         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
  84
  85
  86 /*
  87  * H3xxx uart support
  88  */
  89 static struct gpio h3xxx_uart_gpio[] = {
  90         { H3XXX_GPIO_COM_DCD,   GPIOF_IN,               "COM DCD" },
  91         { H3XXX_GPIO_COM_CTS,   GPIOF_IN,               "COM CTS" },
  92         { H3XXX_GPIO_COM_RTS,   GPIOF_OUT_INIT_LOW,     "COM RTS" },
  93 };
  94
  95 static bool h3xxx_uart_request_gpios(void)
  96 {
  97         static bool h3xxx_uart_gpio_ok;
  98         int rc;
  99
 100         if (h3xxx_uart_gpio_ok)
 101                 return true;
 102
 103         rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio));
 104         if (rc)
 105                 pr_err("h3xxx_uart_request_gpios: error %d\n", rc);
 106         else
 107                 h3xxx_uart_gpio_ok = true;
 108
 109         return h3xxx_uart_gpio_ok;
 110 }
 111
 112 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
 113 {
 114         if (port->mapbase == _Ser3UTCR0) {
 115                 if (!h3xxx_uart_request_gpios())
 116                         return;
 117                 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
 118         }
 119 }
 120
 121 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
 122 {
 123         u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 124
 125         if (port->mapbase == _Ser3UTCR0) {
 126                 if (!h3xxx_uart_request_gpios())
 127                         return ret;
 128                 /*
 129                  * DCD and CTS bits are inverted in GPLR by RS232 transceiver
 130                  */
 131                 if (gpio_get_value(H3XXX_GPIO_COM_DCD))
 132                         ret &= ~TIOCM_CD;
 133                 if (gpio_get_value(H3XXX_GPIO_COM_CTS))
 134                         ret &= ~TIOCM_CTS;
 135         }
 136
 137         return ret;
 138 }
 139
 140 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 141 {
 142         if (port->mapbase == _Ser3UTCR0) {
 143                 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
 144                         gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
 145                         gpio_free(H3XXX_EGPIO_RS232_ON);
 146                 } else {
 147                         pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
 148                                 __func__);
 149                 }
 150         }
 151 }
 152
 153 /*
 154  * Enable/Disable wake up events for this serial port.
 155  * Obviously, we only support this on the normal COM port.
 156  */
 157 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
 158 {
 159         int err = -EINVAL;
 160
 161         if (port->mapbase == _Ser3UTCR0) {
 162                 if (enable)
 163                         PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
 164                 else
 165                         PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
 166                 err = 0;
 167         }
 168         return err;
 169 }
 170
 171 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
 172         .set_mctrl      = h3xxx_uart_set_mctrl,
 173         .get_mctrl      = h3xxx_uart_get_mctrl,
 174         .pm             = h3xxx_uart_pm,
 175         .set_wake       = h3xxx_uart_set_wake,
 176 };
 177
 178 /*
 179  * EGPIO
 180  */
 181
 182 static struct resource egpio_resources[] = {
 183         [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
 184 };
 185
 186 static struct htc_egpio_chip egpio_chips[] = {
 187         [0] = {
 188                 .reg_start      = 0,
 189                 .gpio_base      = H3XXX_EGPIO_BASE,
 190                 .num_gpios      = 16,
 191                 .direction      = HTC_EGPIO_OUTPUT,
 192                 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
 193         },
 194 };
 195
 196 static struct htc_egpio_platform_data egpio_info = {
 197         .reg_width      = 16,
 198         .bus_width      = 16,
 199         .chip           = egpio_chips,
 200         .num_chips      = ARRAY_SIZE(egpio_chips),
 201 };
 202
 203 static struct platform_device h3xxx_egpio = {
 204         .name           = "htc-egpio",
 205         .id             = -1,
 206         .resource       = egpio_resources,
 207         .num_resources  = ARRAY_SIZE(egpio_resources),
 208         .dev            = {
 209                 .platform_data = &egpio_info,
 210         },
 211 };
 212
 213 /*
 214  * GPIO keys
 215  */
 216
 217 static struct gpio_keys_button h3xxx_button_table[] = {
 218         {
 219                 .code           = KEY_POWER,
 220                 .gpio           = H3XXX_GPIO_PWR_BUTTON,
 221                 .desc           = "Power Button",
 222                 .active_low     = 1,
 223                 .type           = EV_KEY,
 224                 .wakeup         = 1,
 225         }, {
 226                 .code           = KEY_ENTER,
 227                 .gpio           = H3XXX_GPIO_ACTION_BUTTON,
 228                 .active_low     = 1,
 229                 .desc           = "Action button",
 230                 .type           = EV_KEY,
 231                 .wakeup         = 0,
 232         },
 233 };
 234
 235 static struct gpio_keys_platform_data h3xxx_keys_data = {
 236         .buttons  = h3xxx_button_table,
 237         .nbuttons = ARRAY_SIZE(h3xxx_button_table),
 238 };
 239
 240 static struct platform_device h3xxx_keys = {
 241         .name   = "gpio-keys",
 242         .id     = -1,
 243         .dev    = {
 244                 .platform_data = &h3xxx_keys_data,
 245         },
 246 };
 247
 248 static struct resource h3xxx_micro_resources[] = {
 249         DEFINE_RES_MEM(0x80010000, SZ_4K),
 250         DEFINE_RES_MEM(0x80020000, SZ_4K),
 251         DEFINE_RES_IRQ(IRQ_Ser1UART),
 252 };
 253
 254 struct platform_device h3xxx_micro_asic = {
 255         .name = "ipaq-h3xxx-micro",
 256         .id = -1,
 257         .resource = h3xxx_micro_resources,
 258         .num_resources = ARRAY_SIZE(h3xxx_micro_resources),
 259 };
 260
 261 static struct platform_device *h3xxx_devices[] = {
 262         &h3xxx_egpio,
 263         &h3xxx_keys,
 264         &h3xxx_micro_asic,
 265 };
 266
 267 void __init h3xxx_mach_init(void)
 268 {
 269         sa1100_register_uart_fns(&h3xxx_port_fns);
 270         sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
 271         platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
 272 }
 273
 274 static struct map_desc h3600_io_desc[] __initdata = {
 275         {       /* static memory bank 2  CS#2 */
 276                 .virtual        =  H3600_BANK_2_VIRT,
 277                 .pfn            = __phys_to_pfn(SA1100_CS2_PHYS),
 278                 .length         = 0x02800000,
 279                 .type           = MT_DEVICE
 280         }, {    /* static memory bank 4  CS#4 */
 281                 .virtual        =  H3600_BANK_4_VIRT,
 282                 .pfn            = __phys_to_pfn(SA1100_CS4_PHYS),
 283                 .length         = 0x00800000,
 284                 .type           = MT_DEVICE
 285         }, {    /* EGPIO 0              CS#5 */
 286                 .virtual        =  H3600_EGPIO_VIRT,
 287                 .pfn            = __phys_to_pfn(H3600_EGPIO_PHYS),
 288                 .length         = 0x01000000,
 289                 .type           = MT_DEVICE
 290         }
 291 };
 292
 293 /*
 294  * Common map_io initialization
 295  */
 296
 297 void __init h3xxx_map_io(void)
 298 {
 299         sa1100_map_io();
 300         iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
 301
 302         sa1100_register_uart(0, 3); /* Common serial port */
 303 //      sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
 304
 305         /* Ensure those pins are outputs and driving low  */
 306         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 307         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 308
 309         /* Configure suspend conditions */
 310         PGSR = 0;
 311         PCFR = PCFR_OPDE;
 312         PSDR = 0;
 313
 314         GPCR = 0x0fffffff;      /* All outputs are set low by default */
 315         GPDR = 0;               /* Configure all GPIOs as input */
 316 }
 317