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