314 lines
6.8 KiB
C
314 lines
6.8 KiB
C
/*
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* Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
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*
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* Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
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* Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/gpio_keys.h>
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#include <linux/input.h>
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#include <linux/mfd/htc-egpio.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/platform_device.h>
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#include <linux/serial_core.h>
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#include <asm/mach/flash.h>
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#include <asm/mach/map.h>
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#include <asm/mach/serial_sa1100.h>
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#include <mach/h3xxx.h>
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#include "generic.h"
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void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
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{
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while (n--) {
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const char *name = s->name;
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int err;
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if (!name)
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name = "[init]";
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err = gpio_request(s->gpio, name);
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if (err) {
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printk(KERN_ERR "gpio%u: unable to request: %d\n",
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s->gpio, err);
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continue;
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}
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if (s->mode >= 0) {
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err = gpio_direction_output(s->gpio, s->mode);
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} else {
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err = gpio_direction_input(s->gpio);
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}
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if (err) {
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printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
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s->gpio, err);
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continue;
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}
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if (!s->name)
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gpio_free(s->gpio);
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s++;
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}
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}
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/*
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* H3xxx flash support
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*/
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static struct mtd_partition h3xxx_partitions[] = {
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{
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.name = "H3XXX boot firmware",
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.size = 0x00040000,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE, /* force read-only */
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}, {
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.name = "H3XXX rootfs",
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.size = MTDPART_SIZ_FULL,
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.offset = 0x00040000,
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}
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};
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static void h3xxx_set_vpp(int vpp)
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{
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gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
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}
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static int h3xxx_flash_init(void)
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{
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int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
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if (err) {
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pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
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return err;
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}
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err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
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if (err)
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gpio_free(H3XXX_EGPIO_VPP_ON);
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return err;
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}
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static void h3xxx_flash_exit(void)
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{
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gpio_free(H3XXX_EGPIO_VPP_ON);
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}
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static struct flash_platform_data h3xxx_flash_data = {
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.map_name = "cfi_probe",
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.set_vpp = h3xxx_set_vpp,
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.init = h3xxx_flash_init,
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.exit = h3xxx_flash_exit,
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.parts = h3xxx_partitions,
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.nr_parts = ARRAY_SIZE(h3xxx_partitions),
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};
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static struct resource h3xxx_flash_resource = {
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.start = SA1100_CS0_PHYS,
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.end = SA1100_CS0_PHYS + SZ_32M - 1,
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.flags = IORESOURCE_MEM,
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};
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/*
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* H3xxx uart support
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*/
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static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
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{
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if (port->mapbase == _Ser3UTCR0) {
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gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
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}
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}
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static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
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{
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u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
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if (port->mapbase == _Ser3UTCR0) {
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/*
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* DCD and CTS bits are inverted in GPLR by RS232 transceiver
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*/
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if (gpio_get_value(H3XXX_GPIO_COM_DCD))
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ret &= ~TIOCM_CD;
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if (gpio_get_value(H3XXX_GPIO_COM_CTS))
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ret &= ~TIOCM_CTS;
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}
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return ret;
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}
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static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
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{
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if (port->mapbase == _Ser3UTCR0) {
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if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
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gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
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gpio_free(H3XXX_EGPIO_RS232_ON);
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} else {
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pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
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__func__);
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}
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}
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}
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/*
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* Enable/Disable wake up events for this serial port.
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* Obviously, we only support this on the normal COM port.
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*/
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static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
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{
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int err = -EINVAL;
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if (port->mapbase == _Ser3UTCR0) {
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if (enable)
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PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
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else
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PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
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err = 0;
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}
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return err;
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}
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static struct sa1100_port_fns h3xxx_port_fns __initdata = {
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.set_mctrl = h3xxx_uart_set_mctrl,
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.get_mctrl = h3xxx_uart_get_mctrl,
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.pm = h3xxx_uart_pm,
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.set_wake = h3xxx_uart_set_wake,
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};
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/*
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* EGPIO
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*/
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static struct resource egpio_resources[] = {
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[0] = {
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.start = H3600_EGPIO_PHYS,
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.end = H3600_EGPIO_PHYS + 0x4 - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct htc_egpio_chip egpio_chips[] = {
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[0] = {
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.reg_start = 0,
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.gpio_base = H3XXX_EGPIO_BASE,
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.num_gpios = 16,
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.direction = HTC_EGPIO_OUTPUT,
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.initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
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},
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};
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static struct htc_egpio_platform_data egpio_info = {
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.reg_width = 16,
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.bus_width = 16,
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.chip = egpio_chips,
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.num_chips = ARRAY_SIZE(egpio_chips),
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};
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static struct platform_device h3xxx_egpio = {
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.name = "htc-egpio",
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.id = -1,
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.resource = egpio_resources,
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.num_resources = ARRAY_SIZE(egpio_resources),
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.dev = {
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.platform_data = &egpio_info,
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},
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};
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/*
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* GPIO keys
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*/
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static struct gpio_keys_button h3xxx_button_table[] = {
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{
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.code = KEY_POWER,
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.gpio = H3XXX_GPIO_PWR_BUTTON,
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.desc = "Power Button",
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.active_low = 1,
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.type = EV_KEY,
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.wakeup = 1,
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}, {
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.code = KEY_ENTER,
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.gpio = H3XXX_GPIO_ACTION_BUTTON,
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.active_low = 1,
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.desc = "Action button",
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.type = EV_KEY,
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.wakeup = 0,
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},
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};
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static struct gpio_keys_platform_data h3xxx_keys_data = {
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.buttons = h3xxx_button_table,
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.nbuttons = ARRAY_SIZE(h3xxx_button_table),
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};
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static struct platform_device h3xxx_keys = {
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.name = "gpio-keys",
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.id = -1,
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.dev = {
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.platform_data = &h3xxx_keys_data,
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},
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};
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static struct platform_device *h3xxx_devices[] = {
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&h3xxx_egpio,
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&h3xxx_keys,
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};
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void __init h3xxx_mach_init(void)
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{
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sa1100_register_uart_fns(&h3xxx_port_fns);
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sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
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platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
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}
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static struct map_desc h3600_io_desc[] __initdata = {
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{ /* static memory bank 2 CS#2 */
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.virtual = H3600_BANK_2_VIRT,
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.pfn = __phys_to_pfn(SA1100_CS2_PHYS),
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.length = 0x02800000,
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.type = MT_DEVICE
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}, { /* static memory bank 4 CS#4 */
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.virtual = H3600_BANK_4_VIRT,
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.pfn = __phys_to_pfn(SA1100_CS4_PHYS),
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.length = 0x00800000,
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.type = MT_DEVICE
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}, { /* EGPIO 0 CS#5 */
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.virtual = H3600_EGPIO_VIRT,
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.pfn = __phys_to_pfn(H3600_EGPIO_PHYS),
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.length = 0x01000000,
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.type = MT_DEVICE
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}
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};
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/*
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* Common map_io initialization
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*/
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void __init h3xxx_map_io(void)
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{
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sa1100_map_io();
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iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
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sa1100_register_uart(0, 3); /* Common serial port */
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// sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
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/* Ensure those pins are outputs and driving low */
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PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
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PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
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/* Configure suspend conditions */
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PGSR = 0;
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PCFR = PCFR_OPDE;
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PSDR = 0;
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GPCR = 0x0fffffff; /* All outputs are set low by default */
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GPDR = 0; /* Configure all GPIOs as input */
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}
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