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 } 317 318