xref: /openbmc/linux/arch/arm/mach-sa1100/h3xxx.c (revision d2912cb1)
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 
h3xxx_set_vpp(int vpp)45 static void h3xxx_set_vpp(int vpp)
46 {
47 	gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
48 }
49 
h3xxx_flash_init(void)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 
h3xxx_flash_exit(void)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  */
h3xxx_uart_pm(struct uart_port * port,u_int state,u_int oldstate)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  */
h3xxx_uart_set_wake(struct uart_port * port,u_int enable)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 
h3xxx_mach_init(void)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 
h3xxx_map_io(void)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