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 } 302 303