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 void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 87 { 88 if (port->mapbase == _Ser3UTCR0) { 89 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { 90 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); 91 gpio_free(H3XXX_EGPIO_RS232_ON); 92 } else { 93 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", 94 __func__); 95 } 96 } 97 } 98 99 /* 100 * Enable/Disable wake up events for this serial port. 101 * Obviously, we only support this on the normal COM port. 102 */ 103 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) 104 { 105 int err = -EINVAL; 106 107 if (port->mapbase == _Ser3UTCR0) { 108 if (enable) 109 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ 110 else 111 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ 112 err = 0; 113 } 114 return err; 115 } 116 117 static struct sa1100_port_fns h3xxx_port_fns __initdata = { 118 .pm = h3xxx_uart_pm, 119 .set_wake = h3xxx_uart_set_wake, 120 }; 121 122 static struct gpiod_lookup_table h3xxx_uart3_gpio_table = { 123 .dev_id = "sa11x0-uart.3", 124 .table = { 125 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_DCD, "dcd", GPIO_ACTIVE_LOW), 126 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_CTS, "cts", GPIO_ACTIVE_LOW), 127 GPIO_LOOKUP("gpio", H3XXX_GPIO_COM_RTS, "rts", GPIO_ACTIVE_LOW), 128 { }, 129 }, 130 }; 131 132 /* 133 * EGPIO 134 */ 135 136 static struct resource egpio_resources[] = { 137 [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4), 138 }; 139 140 static struct htc_egpio_chip egpio_chips[] = { 141 [0] = { 142 .reg_start = 0, 143 .gpio_base = H3XXX_EGPIO_BASE, 144 .num_gpios = 16, 145 .direction = HTC_EGPIO_OUTPUT, 146 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ 147 }, 148 }; 149 150 static struct htc_egpio_platform_data egpio_info = { 151 .reg_width = 16, 152 .bus_width = 16, 153 .chip = egpio_chips, 154 .num_chips = ARRAY_SIZE(egpio_chips), 155 }; 156 157 static struct platform_device h3xxx_egpio = { 158 .name = "htc-egpio", 159 .id = -1, 160 .resource = egpio_resources, 161 .num_resources = ARRAY_SIZE(egpio_resources), 162 .dev = { 163 .platform_data = &egpio_info, 164 }, 165 }; 166 167 /* 168 * GPIO keys 169 */ 170 171 static struct gpio_keys_button h3xxx_button_table[] = { 172 { 173 .code = KEY_POWER, 174 .gpio = H3XXX_GPIO_PWR_BUTTON, 175 .desc = "Power Button", 176 .active_low = 1, 177 .type = EV_KEY, 178 .wakeup = 1, 179 }, { 180 .code = KEY_ENTER, 181 .gpio = H3XXX_GPIO_ACTION_BUTTON, 182 .active_low = 1, 183 .desc = "Action button", 184 .type = EV_KEY, 185 .wakeup = 0, 186 }, 187 }; 188 189 static struct gpio_keys_platform_data h3xxx_keys_data = { 190 .buttons = h3xxx_button_table, 191 .nbuttons = ARRAY_SIZE(h3xxx_button_table), 192 }; 193 194 static struct platform_device h3xxx_keys = { 195 .name = "gpio-keys", 196 .id = -1, 197 .dev = { 198 .platform_data = &h3xxx_keys_data, 199 }, 200 }; 201 202 static struct resource h3xxx_micro_resources[] = { 203 DEFINE_RES_MEM(0x80010000, SZ_4K), 204 DEFINE_RES_MEM(0x80020000, SZ_4K), 205 DEFINE_RES_IRQ(IRQ_Ser1UART), 206 }; 207 208 struct platform_device h3xxx_micro_asic = { 209 .name = "ipaq-h3xxx-micro", 210 .id = -1, 211 .resource = h3xxx_micro_resources, 212 .num_resources = ARRAY_SIZE(h3xxx_micro_resources), 213 }; 214 215 static struct platform_device *h3xxx_devices[] = { 216 &h3xxx_egpio, 217 &h3xxx_keys, 218 &h3xxx_micro_asic, 219 }; 220 221 static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = { 222 .dev_id = "sa11x0-pcmcia", 223 .table = { 224 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0, 225 "pcmcia0-detect", GPIO_ACTIVE_LOW), 226 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0, 227 "pcmcia0-ready", GPIO_ACTIVE_HIGH), 228 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1, 229 "pcmcia1-detect", GPIO_ACTIVE_LOW), 230 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1, 231 "pcmcia1-ready", GPIO_ACTIVE_HIGH), 232 { }, 233 }, 234 }; 235 236 void __init h3xxx_mach_init(void) 237 { 238 gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table); 239 gpiod_add_lookup_table(&h3xxx_uart3_gpio_table); 240 sa1100_register_uart_fns(&h3xxx_port_fns); 241 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); 242 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); 243 } 244 245 static struct map_desc h3600_io_desc[] __initdata = { 246 { /* static memory bank 2 CS#2 */ 247 .virtual = H3600_BANK_2_VIRT, 248 .pfn = __phys_to_pfn(SA1100_CS2_PHYS), 249 .length = 0x02800000, 250 .type = MT_DEVICE 251 }, { /* static memory bank 4 CS#4 */ 252 .virtual = H3600_BANK_4_VIRT, 253 .pfn = __phys_to_pfn(SA1100_CS4_PHYS), 254 .length = 0x00800000, 255 .type = MT_DEVICE 256 }, { /* EGPIO 0 CS#5 */ 257 .virtual = H3600_EGPIO_VIRT, 258 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), 259 .length = 0x01000000, 260 .type = MT_DEVICE 261 } 262 }; 263 264 /* 265 * Common map_io initialization 266 */ 267 268 void __init h3xxx_map_io(void) 269 { 270 sa1100_map_io(); 271 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); 272 273 sa1100_register_uart(0, 3); /* Common serial port */ 274 // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ 275 276 /* Ensure those pins are outputs and driving low */ 277 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 278 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 279 280 /* Configure suspend conditions */ 281 PGSR = 0; 282 PCFR = PCFR_OPDE; 283 PSDR = 0; 284 285 GPCR = 0x0fffffff; /* All outputs are set low by default */ 286 GPDR = 0; /* Configure all GPIOs as input */ 287 } 288 289