1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code) 4 * 5 * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks) 6 * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru> 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/gpio/machine.h> 11 #include <linux/gpio.h> 12 #include <linux/gpio_keys.h> 13 #include <linux/input.h> 14 #include <linux/mtd/mtd.h> 15 #include <linux/mtd/partitions.h> 16 #include <linux/platform_data/gpio-htc-egpio.h> 17 #include <linux/platform_data/sa11x0-serial.h> 18 #include <linux/platform_device.h> 19 #include <linux/serial_core.h> 20 21 #include <asm/mach/flash.h> 22 #include <asm/mach/map.h> 23 24 #include <mach/h3xxx.h> 25 #include <mach/irqs.h> 26 27 #include "generic.h" 28 29 /* 30 * H3xxx flash support 31 */ 32 static struct mtd_partition h3xxx_partitions[] = { 33 { 34 .name = "H3XXX boot firmware", 35 .size = 0x00040000, 36 .offset = 0, 37 .mask_flags = MTD_WRITEABLE, /* force read-only */ 38 }, { 39 .name = "H3XXX rootfs", 40 .size = MTDPART_SIZ_FULL, 41 .offset = 0x00040000, 42 } 43 }; 44 45 static void h3xxx_set_vpp(int vpp) 46 { 47 gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp); 48 } 49 50 static int h3xxx_flash_init(void) 51 { 52 int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp"); 53 if (err) { 54 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__); 55 return err; 56 } 57 58 err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0); 59 if (err) 60 gpio_free(H3XXX_EGPIO_VPP_ON); 61 62 return err; 63 } 64 65 static void h3xxx_flash_exit(void) 66 { 67 gpio_free(H3XXX_EGPIO_VPP_ON); 68 } 69 70 static struct flash_platform_data h3xxx_flash_data = { 71 .map_name = "cfi_probe", 72 .set_vpp = h3xxx_set_vpp, 73 .init = h3xxx_flash_init, 74 .exit = h3xxx_flash_exit, 75 .parts = h3xxx_partitions, 76 .nr_parts = ARRAY_SIZE(h3xxx_partitions), 77 }; 78 79 static struct resource h3xxx_flash_resource = 80 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M); 81 82 83 /* 84 * H3xxx uart support 85 */ 86 static struct gpio h3xxx_uart_gpio[] = { 87 { H3XXX_GPIO_COM_DCD, GPIOF_IN, "COM DCD" }, 88 { H3XXX_GPIO_COM_CTS, GPIOF_IN, "COM CTS" }, 89 { H3XXX_GPIO_COM_RTS, GPIOF_OUT_INIT_LOW, "COM RTS" }, 90 }; 91 92 static bool h3xxx_uart_request_gpios(void) 93 { 94 static bool h3xxx_uart_gpio_ok; 95 int rc; 96 97 if (h3xxx_uart_gpio_ok) 98 return true; 99 100 rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio)); 101 if (rc) 102 pr_err("h3xxx_uart_request_gpios: error %d\n", rc); 103 else 104 h3xxx_uart_gpio_ok = true; 105 106 return h3xxx_uart_gpio_ok; 107 } 108 109 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) 110 { 111 if (port->mapbase == _Ser3UTCR0) { 112 if (!h3xxx_uart_request_gpios()) 113 return; 114 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); 115 } 116 } 117 118 static u_int h3xxx_uart_get_mctrl(struct uart_port *port) 119 { 120 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 121 122 if (port->mapbase == _Ser3UTCR0) { 123 if (!h3xxx_uart_request_gpios()) 124 return ret; 125 /* 126 * DCD and CTS bits are inverted in GPLR by RS232 transceiver 127 */ 128 if (gpio_get_value(H3XXX_GPIO_COM_DCD)) 129 ret &= ~TIOCM_CD; 130 if (gpio_get_value(H3XXX_GPIO_COM_CTS)) 131 ret &= ~TIOCM_CTS; 132 } 133 134 return ret; 135 } 136 137 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 138 { 139 if (port->mapbase == _Ser3UTCR0) { 140 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { 141 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); 142 gpio_free(H3XXX_EGPIO_RS232_ON); 143 } else { 144 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", 145 __func__); 146 } 147 } 148 } 149 150 /* 151 * Enable/Disable wake up events for this serial port. 152 * Obviously, we only support this on the normal COM port. 153 */ 154 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) 155 { 156 int err = -EINVAL; 157 158 if (port->mapbase == _Ser3UTCR0) { 159 if (enable) 160 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ 161 else 162 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ 163 err = 0; 164 } 165 return err; 166 } 167 168 static struct sa1100_port_fns h3xxx_port_fns __initdata = { 169 .set_mctrl = h3xxx_uart_set_mctrl, 170 .get_mctrl = h3xxx_uart_get_mctrl, 171 .pm = h3xxx_uart_pm, 172 .set_wake = h3xxx_uart_set_wake, 173 }; 174 175 /* 176 * EGPIO 177 */ 178 179 static struct resource egpio_resources[] = { 180 [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4), 181 }; 182 183 static struct htc_egpio_chip egpio_chips[] = { 184 [0] = { 185 .reg_start = 0, 186 .gpio_base = H3XXX_EGPIO_BASE, 187 .num_gpios = 16, 188 .direction = HTC_EGPIO_OUTPUT, 189 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ 190 }, 191 }; 192 193 static struct htc_egpio_platform_data egpio_info = { 194 .reg_width = 16, 195 .bus_width = 16, 196 .chip = egpio_chips, 197 .num_chips = ARRAY_SIZE(egpio_chips), 198 }; 199 200 static struct platform_device h3xxx_egpio = { 201 .name = "htc-egpio", 202 .id = -1, 203 .resource = egpio_resources, 204 .num_resources = ARRAY_SIZE(egpio_resources), 205 .dev = { 206 .platform_data = &egpio_info, 207 }, 208 }; 209 210 /* 211 * GPIO keys 212 */ 213 214 static struct gpio_keys_button h3xxx_button_table[] = { 215 { 216 .code = KEY_POWER, 217 .gpio = H3XXX_GPIO_PWR_BUTTON, 218 .desc = "Power Button", 219 .active_low = 1, 220 .type = EV_KEY, 221 .wakeup = 1, 222 }, { 223 .code = KEY_ENTER, 224 .gpio = H3XXX_GPIO_ACTION_BUTTON, 225 .active_low = 1, 226 .desc = "Action button", 227 .type = EV_KEY, 228 .wakeup = 0, 229 }, 230 }; 231 232 static struct gpio_keys_platform_data h3xxx_keys_data = { 233 .buttons = h3xxx_button_table, 234 .nbuttons = ARRAY_SIZE(h3xxx_button_table), 235 }; 236 237 static struct platform_device h3xxx_keys = { 238 .name = "gpio-keys", 239 .id = -1, 240 .dev = { 241 .platform_data = &h3xxx_keys_data, 242 }, 243 }; 244 245 static struct resource h3xxx_micro_resources[] = { 246 DEFINE_RES_MEM(0x80010000, SZ_4K), 247 DEFINE_RES_MEM(0x80020000, SZ_4K), 248 DEFINE_RES_IRQ(IRQ_Ser1UART), 249 }; 250 251 struct platform_device h3xxx_micro_asic = { 252 .name = "ipaq-h3xxx-micro", 253 .id = -1, 254 .resource = h3xxx_micro_resources, 255 .num_resources = ARRAY_SIZE(h3xxx_micro_resources), 256 }; 257 258 static struct platform_device *h3xxx_devices[] = { 259 &h3xxx_egpio, 260 &h3xxx_keys, 261 &h3xxx_micro_asic, 262 }; 263 264 static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = { 265 .dev_id = "sa11x0-pcmcia", 266 .table = { 267 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0, 268 "pcmcia0-detect", GPIO_ACTIVE_LOW), 269 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0, 270 "pcmcia0-ready", GPIO_ACTIVE_HIGH), 271 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1, 272 "pcmcia1-detect", GPIO_ACTIVE_LOW), 273 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1, 274 "pcmcia1-ready", GPIO_ACTIVE_HIGH), 275 { }, 276 }, 277 }; 278 279 void __init h3xxx_mach_init(void) 280 { 281 gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table); 282 sa1100_register_uart_fns(&h3xxx_port_fns); 283 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); 284 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); 285 } 286 287 static struct map_desc h3600_io_desc[] __initdata = { 288 { /* static memory bank 2 CS#2 */ 289 .virtual = H3600_BANK_2_VIRT, 290 .pfn = __phys_to_pfn(SA1100_CS2_PHYS), 291 .length = 0x02800000, 292 .type = MT_DEVICE 293 }, { /* static memory bank 4 CS#4 */ 294 .virtual = H3600_BANK_4_VIRT, 295 .pfn = __phys_to_pfn(SA1100_CS4_PHYS), 296 .length = 0x00800000, 297 .type = MT_DEVICE 298 }, { /* EGPIO 0 CS#5 */ 299 .virtual = H3600_EGPIO_VIRT, 300 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), 301 .length = 0x01000000, 302 .type = MT_DEVICE 303 } 304 }; 305 306 /* 307 * Common map_io initialization 308 */ 309 310 void __init h3xxx_map_io(void) 311 { 312 sa1100_map_io(); 313 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); 314 315 sa1100_register_uart(0, 3); /* Common serial port */ 316 // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ 317 318 /* Ensure those pins are outputs and driving low */ 319 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 320 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 321 322 /* Configure suspend conditions */ 323 PGSR = 0; 324 PCFR = PCFR_OPDE; 325 PSDR = 0; 326 327 GPCR = 0x0fffffff; /* All outputs are set low by default */ 328 GPDR = 0; /* Configure all GPIOs as input */ 329 } 330 331