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
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