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_device.h> 21#include <linux/serial_core.h> 22 23#include <asm/mach/flash.h> 24#include <asm/mach/map.h> 25#include <asm/mach/serial_sa1100.h> 26 27#include <mach/h3xxx.h> 28 29#include "generic.h" 30 31void h3xxx_init_gpio(struct gpio_default_state *s, size_t n) 32{ 33 while (n--) { 34 const char *name = s->name; 35 int err; 36 37 if (!name) 38 name = "[init]"; 39 err = gpio_request(s->gpio, name); 40 if (err) { 41 printk(KERN_ERR "gpio%u: unable to request: %d\n", 42 s->gpio, err); 43 continue; 44 } 45 if (s->mode >= 0) { 46 err = gpio_direction_output(s->gpio, s->mode); 47 } else { 48 err = gpio_direction_input(s->gpio); 49 } 50 if (err) { 51 printk(KERN_ERR "gpio%u: unable to set direction: %d\n", 52 s->gpio, err); 53 continue; 54 } 55 if (!s->name) 56 gpio_free(s->gpio); 57 s++; 58 } 59} 60 61 62/* 63 * H3xxx flash support 64 */ 65static struct mtd_partition h3xxx_partitions[] = { 66 { 67 .name = "H3XXX boot firmware", 68 .size = 0x00040000, 69 .offset = 0, 70 .mask_flags = MTD_WRITEABLE, /* force read-only */ 71 }, { 72 .name = "H3XXX rootfs", 73 .size = MTDPART_SIZ_FULL, 74 .offset = 0x00040000, 75 } 76}; 77 78static void h3xxx_set_vpp(int vpp) 79{ 80 gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp); 81} 82 83static int h3xxx_flash_init(void) 84{ 85 int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp"); 86 if (err) { 87 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__); 88 return err; 89 } 90 91 err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0); 92 if (err) 93 gpio_free(H3XXX_EGPIO_VPP_ON); 94 95 return err; 96} 97 98static void h3xxx_flash_exit(void) 99{ 100 gpio_free(H3XXX_EGPIO_VPP_ON); 101} 102 103static struct flash_platform_data h3xxx_flash_data = { 104 .map_name = "cfi_probe", 105 .set_vpp = h3xxx_set_vpp, 106 .init = h3xxx_flash_init, 107 .exit = h3xxx_flash_exit, 108 .parts = h3xxx_partitions, 109 .nr_parts = ARRAY_SIZE(h3xxx_partitions), 110}; 111 112static struct resource h3xxx_flash_resource = { 113 .start = SA1100_CS0_PHYS, 114 .end = SA1100_CS0_PHYS + SZ_32M - 1, 115 .flags = IORESOURCE_MEM, 116}; 117 118 119/* 120 * H3xxx uart support 121 */ 122static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) 123{ 124 if (port->mapbase == _Ser3UTCR0) { 125 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); 126 } 127} 128 129static u_int h3xxx_uart_get_mctrl(struct uart_port *port) 130{ 131 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 132 133 if (port->mapbase == _Ser3UTCR0) { 134 /* 135 * DCD and CTS bits are inverted in GPLR by RS232 transceiver 136 */ 137 if (gpio_get_value(H3XXX_GPIO_COM_DCD)) 138 ret &= ~TIOCM_CD; 139 if (gpio_get_value(H3XXX_GPIO_COM_CTS)) 140 ret &= ~TIOCM_CTS; 141 } 142 143 return ret; 144} 145 146static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 147{ 148 if (port->mapbase == _Ser3UTCR0) { 149 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { 150 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); 151 gpio_free(H3XXX_EGPIO_RS232_ON); 152 } else { 153 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", 154 __func__); 155 } 156 } 157} 158 159/* 160 * Enable/Disable wake up events for this serial port. 161 * Obviously, we only support this on the normal COM port. 162 */ 163static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) 164{ 165 int err = -EINVAL; 166 167 if (port->mapbase == _Ser3UTCR0) { 168 if (enable) 169 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ 170 else 171 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ 172 err = 0; 173 } 174 return err; 175} 176 177static struct sa1100_port_fns h3xxx_port_fns __initdata = { 178 .set_mctrl = h3xxx_uart_set_mctrl, 179 .get_mctrl = h3xxx_uart_get_mctrl, 180 .pm = h3xxx_uart_pm, 181 .set_wake = h3xxx_uart_set_wake, 182}; 183 184/* 185 * EGPIO 186 */ 187 188static struct resource egpio_resources[] = { 189 [0] = { 190 .start = H3600_EGPIO_PHYS, 191 .end = H3600_EGPIO_PHYS + 0x4 - 1, 192 .flags = IORESOURCE_MEM, 193 }, 194}; 195 196static struct htc_egpio_chip egpio_chips[] = { 197 [0] = { 198 .reg_start = 0, 199 .gpio_base = H3XXX_EGPIO_BASE, 200 .num_gpios = 16, 201 .direction = HTC_EGPIO_OUTPUT, 202 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ 203 }, 204}; 205 206static struct htc_egpio_platform_data egpio_info = { 207 .reg_width = 16, 208 .bus_width = 16, 209 .chip = egpio_chips, 210 .num_chips = ARRAY_SIZE(egpio_chips), 211}; 212 213static struct platform_device h3xxx_egpio = { 214 .name = "htc-egpio", 215 .id = -1, 216 .resource = egpio_resources, 217 .num_resources = ARRAY_SIZE(egpio_resources), 218 .dev = { 219 .platform_data = &egpio_info, 220 }, 221}; 222 223/* 224 * GPIO keys 225 */ 226 227static struct gpio_keys_button h3xxx_button_table[] = { 228 { 229 .code = KEY_POWER, 230 .gpio = H3XXX_GPIO_PWR_BUTTON, 231 .desc = "Power Button", 232 .active_low = 1, 233 .type = EV_KEY, 234 .wakeup = 1, 235 }, { 236 .code = KEY_ENTER, 237 .gpio = H3XXX_GPIO_ACTION_BUTTON, 238 .active_low = 1, 239 .desc = "Action button", 240 .type = EV_KEY, 241 .wakeup = 0, 242 }, 243}; 244 245static struct gpio_keys_platform_data h3xxx_keys_data = { 246 .buttons = h3xxx_button_table, 247 .nbuttons = ARRAY_SIZE(h3xxx_button_table), 248}; 249 250static struct platform_device h3xxx_keys = { 251 .name = "gpio-keys", 252 .id = -1, 253 .dev = { 254 .platform_data = &h3xxx_keys_data, 255 }, 256}; 257 258static struct platform_device *h3xxx_devices[] = { 259 &h3xxx_egpio, 260 &h3xxx_keys, 261}; 262 263void __init h3xxx_mach_init(void) 264{ 265 sa1100_register_uart_fns(&h3xxx_port_fns); 266 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); 267 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); 268} 269 270static struct map_desc h3600_io_desc[] __initdata = { 271 { /* static memory bank 2 CS#2 */ 272 .virtual = H3600_BANK_2_VIRT, 273 .pfn = __phys_to_pfn(SA1100_CS2_PHYS), 274 .length = 0x02800000, 275 .type = MT_DEVICE 276 }, { /* static memory bank 4 CS#4 */ 277 .virtual = H3600_BANK_4_VIRT, 278 .pfn = __phys_to_pfn(SA1100_CS4_PHYS), 279 .length = 0x00800000, 280 .type = MT_DEVICE 281 }, { /* EGPIO 0 CS#5 */ 282 .virtual = H3600_EGPIO_VIRT, 283 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), 284 .length = 0x01000000, 285 .type = MT_DEVICE 286 } 287}; 288 289/* 290 * Common map_io initialization 291 */ 292 293void __init h3xxx_map_io(void) 294{ 295 sa1100_map_io(); 296 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); 297 298 sa1100_register_uart(0, 3); /* Common serial port */ 299// sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ 300 301 /* Ensure those pins are outputs and driving low */ 302 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 303 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 304 305 /* Configure suspend conditions */ 306 PGSR = 0; 307 PCFR = PCFR_OPDE; 308 PSDR = 0; 309 310 GPCR = 0x0fffffff; /* All outputs are set low by default */ 311 GPDR = 0; /* Configure all GPIOs as input */ 312} 313