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/machine.h> 15 #include <linux/gpio.h> 16 #include <linux/gpio_keys.h> 17 #include <linux/input.h> 18 #include <linux/mtd/mtd.h> 19 #include <linux/mtd/partitions.h> 20 #include <linux/platform_data/gpio-htc-egpio.h> 21 #include <linux/platform_data/sa11x0-serial.h> 22 #include <linux/platform_device.h> 23 #include <linux/serial_core.h> 24 25 #include <asm/mach/flash.h> 26 #include <asm/mach/map.h> 27 28 #include <mach/h3xxx.h> 29 #include <mach/irqs.h> 30 31 #include "generic.h" 32 33 /* 34 * H3xxx flash support 35 */ 36 static struct mtd_partition h3xxx_partitions[] = { 37 { 38 .name = "H3XXX boot firmware", 39 .size = 0x00040000, 40 .offset = 0, 41 .mask_flags = MTD_WRITEABLE, /* force read-only */ 42 }, { 43 .name = "H3XXX rootfs", 44 .size = MTDPART_SIZ_FULL, 45 .offset = 0x00040000, 46 } 47 }; 48 49 static void h3xxx_set_vpp(int vpp) 50 { 51 gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp); 52 } 53 54 static int h3xxx_flash_init(void) 55 { 56 int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp"); 57 if (err) { 58 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__); 59 return err; 60 } 61 62 err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0); 63 if (err) 64 gpio_free(H3XXX_EGPIO_VPP_ON); 65 66 return err; 67 } 68 69 static void h3xxx_flash_exit(void) 70 { 71 gpio_free(H3XXX_EGPIO_VPP_ON); 72 } 73 74 static struct flash_platform_data h3xxx_flash_data = { 75 .map_name = "cfi_probe", 76 .set_vpp = h3xxx_set_vpp, 77 .init = h3xxx_flash_init, 78 .exit = h3xxx_flash_exit, 79 .parts = h3xxx_partitions, 80 .nr_parts = ARRAY_SIZE(h3xxx_partitions), 81 }; 82 83 static struct resource h3xxx_flash_resource = 84 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M); 85 86 87 /* 88 * H3xxx uart support 89 */ 90 static struct gpio h3xxx_uart_gpio[] = { 91 { H3XXX_GPIO_COM_DCD, GPIOF_IN, "COM DCD" }, 92 { H3XXX_GPIO_COM_CTS, GPIOF_IN, "COM CTS" }, 93 { H3XXX_GPIO_COM_RTS, GPIOF_OUT_INIT_LOW, "COM RTS" }, 94 }; 95 96 static bool h3xxx_uart_request_gpios(void) 97 { 98 static bool h3xxx_uart_gpio_ok; 99 int rc; 100 101 if (h3xxx_uart_gpio_ok) 102 return true; 103 104 rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio)); 105 if (rc) 106 pr_err("h3xxx_uart_request_gpios: error %d\n", rc); 107 else 108 h3xxx_uart_gpio_ok = true; 109 110 return h3xxx_uart_gpio_ok; 111 } 112 113 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) 114 { 115 if (port->mapbase == _Ser3UTCR0) { 116 if (!h3xxx_uart_request_gpios()) 117 return; 118 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); 119 } 120 } 121 122 static u_int h3xxx_uart_get_mctrl(struct uart_port *port) 123 { 124 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 125 126 if (port->mapbase == _Ser3UTCR0) { 127 if (!h3xxx_uart_request_gpios()) 128 return ret; 129 /* 130 * DCD and CTS bits are inverted in GPLR by RS232 transceiver 131 */ 132 if (gpio_get_value(H3XXX_GPIO_COM_DCD)) 133 ret &= ~TIOCM_CD; 134 if (gpio_get_value(H3XXX_GPIO_COM_CTS)) 135 ret &= ~TIOCM_CTS; 136 } 137 138 return ret; 139 } 140 141 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 142 { 143 if (port->mapbase == _Ser3UTCR0) { 144 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { 145 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); 146 gpio_free(H3XXX_EGPIO_RS232_ON); 147 } else { 148 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", 149 __func__); 150 } 151 } 152 } 153 154 /* 155 * Enable/Disable wake up events for this serial port. 156 * Obviously, we only support this on the normal COM port. 157 */ 158 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) 159 { 160 int err = -EINVAL; 161 162 if (port->mapbase == _Ser3UTCR0) { 163 if (enable) 164 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ 165 else 166 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ 167 err = 0; 168 } 169 return err; 170 } 171 172 static struct sa1100_port_fns h3xxx_port_fns __initdata = { 173 .set_mctrl = h3xxx_uart_set_mctrl, 174 .get_mctrl = h3xxx_uart_get_mctrl, 175 .pm = h3xxx_uart_pm, 176 .set_wake = h3xxx_uart_set_wake, 177 }; 178 179 /* 180 * EGPIO 181 */ 182 183 static struct resource egpio_resources[] = { 184 [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4), 185 }; 186 187 static struct htc_egpio_chip egpio_chips[] = { 188 [0] = { 189 .reg_start = 0, 190 .gpio_base = H3XXX_EGPIO_BASE, 191 .num_gpios = 16, 192 .direction = HTC_EGPIO_OUTPUT, 193 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ 194 }, 195 }; 196 197 static struct htc_egpio_platform_data egpio_info = { 198 .reg_width = 16, 199 .bus_width = 16, 200 .chip = egpio_chips, 201 .num_chips = ARRAY_SIZE(egpio_chips), 202 }; 203 204 static struct platform_device h3xxx_egpio = { 205 .name = "htc-egpio", 206 .id = -1, 207 .resource = egpio_resources, 208 .num_resources = ARRAY_SIZE(egpio_resources), 209 .dev = { 210 .platform_data = &egpio_info, 211 }, 212 }; 213 214 /* 215 * GPIO keys 216 */ 217 218 static struct gpio_keys_button h3xxx_button_table[] = { 219 { 220 .code = KEY_POWER, 221 .gpio = H3XXX_GPIO_PWR_BUTTON, 222 .desc = "Power Button", 223 .active_low = 1, 224 .type = EV_KEY, 225 .wakeup = 1, 226 }, { 227 .code = KEY_ENTER, 228 .gpio = H3XXX_GPIO_ACTION_BUTTON, 229 .active_low = 1, 230 .desc = "Action button", 231 .type = EV_KEY, 232 .wakeup = 0, 233 }, 234 }; 235 236 static struct gpio_keys_platform_data h3xxx_keys_data = { 237 .buttons = h3xxx_button_table, 238 .nbuttons = ARRAY_SIZE(h3xxx_button_table), 239 }; 240 241 static struct platform_device h3xxx_keys = { 242 .name = "gpio-keys", 243 .id = -1, 244 .dev = { 245 .platform_data = &h3xxx_keys_data, 246 }, 247 }; 248 249 static struct resource h3xxx_micro_resources[] = { 250 DEFINE_RES_MEM(0x80010000, SZ_4K), 251 DEFINE_RES_MEM(0x80020000, SZ_4K), 252 DEFINE_RES_IRQ(IRQ_Ser1UART), 253 }; 254 255 struct platform_device h3xxx_micro_asic = { 256 .name = "ipaq-h3xxx-micro", 257 .id = -1, 258 .resource = h3xxx_micro_resources, 259 .num_resources = ARRAY_SIZE(h3xxx_micro_resources), 260 }; 261 262 static struct platform_device *h3xxx_devices[] = { 263 &h3xxx_egpio, 264 &h3xxx_keys, 265 &h3xxx_micro_asic, 266 }; 267 268 static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = { 269 .dev_id = "sa11x0-pcmcia", 270 .table = { 271 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0, 272 "pcmcia0-detect", GPIO_ACTIVE_LOW), 273 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0, 274 "pcmcia0-ready", GPIO_ACTIVE_HIGH), 275 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1, 276 "pcmcia1-detect", GPIO_ACTIVE_LOW), 277 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1, 278 "pcmcia1-ready", GPIO_ACTIVE_HIGH), 279 { }, 280 }, 281 }; 282 283 void __init h3xxx_mach_init(void) 284 { 285 gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table); 286 sa1100_register_uart_fns(&h3xxx_port_fns); 287 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); 288 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); 289 } 290 291 static struct map_desc h3600_io_desc[] __initdata = { 292 { /* static memory bank 2 CS#2 */ 293 .virtual = H3600_BANK_2_VIRT, 294 .pfn = __phys_to_pfn(SA1100_CS2_PHYS), 295 .length = 0x02800000, 296 .type = MT_DEVICE 297 }, { /* static memory bank 4 CS#4 */ 298 .virtual = H3600_BANK_4_VIRT, 299 .pfn = __phys_to_pfn(SA1100_CS4_PHYS), 300 .length = 0x00800000, 301 .type = MT_DEVICE 302 }, { /* EGPIO 0 CS#5 */ 303 .virtual = H3600_EGPIO_VIRT, 304 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), 305 .length = 0x01000000, 306 .type = MT_DEVICE 307 } 308 }; 309 310 /* 311 * Common map_io initialization 312 */ 313 314 void __init h3xxx_map_io(void) 315 { 316 sa1100_map_io(); 317 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); 318 319 sa1100_register_uart(0, 3); /* Common serial port */ 320 // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ 321 322 /* Ensure those pins are outputs and driving low */ 323 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 324 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 325 326 /* Configure suspend conditions */ 327 PGSR = 0; 328 PCFR = PCFR_OPDE; 329 PSDR = 0; 330 331 GPCR = 0x0fffffff; /* All outputs are set low by default */ 332 GPDR = 0; /* Configure all GPIOs as input */ 333 } 334 335