![Russell King](/assets/img/avatar_default.png)
For some platforms, it is inappropriate to register all PXA UARTs. In some cases, the UARTs may not be used, and in others we may want to avoid registering the UARTs to allow other drivers (eg, FICP) to make use of the UART. In addition, a while back there was a request to be able to pass platform data to the UART driver. This patch enables all of this by providing functions platforms can call to register each individual UART. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
366 lines
8.8 KiB
C
366 lines
8.8 KiB
C
/*
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* linux/arch/arm/mach-pxa/balloon3.c
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*
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* Support for Balloonboard.org Balloon3 board.
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*
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* Author: Nick Bane, Wookey, Jonathan McDowell
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* Created: June, 2006
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* Copyright: Toby Churchill Ltd
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* Derived from mainstone.c, by Nico Pitre
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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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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/sysdev.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/bitops.h>
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#include <linux/fb.h>
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#include <linux/gpio.h>
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#include <linux/ioport.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/types.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <asm/sizes.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/flash.h>
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#include <mach/pxa27x.h>
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#include <mach/balloon3.h>
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#include <mach/audio.h>
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#include <mach/pxafb.h>
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#include <mach/mmc.h>
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#include <mach/udc.h>
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#include <mach/pxa27x-udc.h>
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#include <mach/irda.h>
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#include <mach/ohci.h>
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#include <plat/i2c.h>
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#include "generic.h"
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#include "devices.h"
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static unsigned long balloon3_irq_enabled;
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static unsigned long balloon3_features_present =
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(1 << BALLOON3_FEATURE_OHCI) | (1 << BALLOON3_FEATURE_CF) |
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(1 << BALLOON3_FEATURE_AUDIO) |
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(1 << BALLOON3_FEATURE_TOPPOLY);
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int balloon3_has(enum balloon3_features feature)
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{
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return (balloon3_features_present & (1 << feature)) ? 1 : 0;
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}
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EXPORT_SYMBOL_GPL(balloon3_has);
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int __init parse_balloon3_features(char *arg)
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{
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if (!arg)
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return 0;
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return strict_strtoul(arg, 0, &balloon3_features_present);
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}
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early_param("balloon3_features", parse_balloon3_features);
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static void balloon3_mask_irq(unsigned int irq)
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{
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int balloon3_irq = (irq - BALLOON3_IRQ(0));
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balloon3_irq_enabled &= ~(1 << balloon3_irq);
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__raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
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}
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static void balloon3_unmask_irq(unsigned int irq)
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{
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int balloon3_irq = (irq - BALLOON3_IRQ(0));
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balloon3_irq_enabled |= (1 << balloon3_irq);
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__raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
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}
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static struct irq_chip balloon3_irq_chip = {
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.name = "FPGA",
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.ack = balloon3_mask_irq,
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.mask = balloon3_mask_irq,
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.unmask = balloon3_unmask_irq,
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};
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static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
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{
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unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
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balloon3_irq_enabled;
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do {
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/* clear useless edge notification */
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if (desc->chip->ack)
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desc->chip->ack(BALLOON3_AUX_NIRQ);
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while (pending) {
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irq = BALLOON3_IRQ(0) + __ffs(pending);
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generic_handle_irq(irq);
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pending &= pending - 1;
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}
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pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
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balloon3_irq_enabled;
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} while (pending);
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}
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static void __init balloon3_init_irq(void)
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{
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int irq;
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pxa27x_init_irq();
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/* setup extra Balloon3 irqs */
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for (irq = BALLOON3_IRQ(0); irq <= BALLOON3_IRQ(7); irq++) {
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set_irq_chip(irq, &balloon3_irq_chip);
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set_irq_handler(irq, handle_level_irq);
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set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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}
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set_irq_chained_handler(BALLOON3_AUX_NIRQ, balloon3_irq_handler);
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set_irq_type(BALLOON3_AUX_NIRQ, IRQ_TYPE_EDGE_FALLING);
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pr_debug("%s: chained handler installed - irq %d automatically "
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"enabled\n", __func__, BALLOON3_AUX_NIRQ);
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}
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static void balloon3_backlight_power(int on)
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{
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pr_debug("%s: power is %s\n", __func__, on ? "on" : "off");
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gpio_set_value(BALLOON3_GPIO_RUN_BACKLIGHT, on);
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}
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static unsigned long balloon3_lcd_pin_config[] = {
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/* LCD - 16bpp Active TFT */
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GPIO58_LCD_LDD_0,
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GPIO59_LCD_LDD_1,
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GPIO60_LCD_LDD_2,
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GPIO61_LCD_LDD_3,
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GPIO62_LCD_LDD_4,
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GPIO63_LCD_LDD_5,
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GPIO64_LCD_LDD_6,
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GPIO65_LCD_LDD_7,
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GPIO66_LCD_LDD_8,
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GPIO67_LCD_LDD_9,
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GPIO68_LCD_LDD_10,
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GPIO69_LCD_LDD_11,
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GPIO70_LCD_LDD_12,
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GPIO71_LCD_LDD_13,
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GPIO72_LCD_LDD_14,
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GPIO73_LCD_LDD_15,
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GPIO74_LCD_FCLK,
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GPIO75_LCD_LCLK,
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GPIO76_LCD_PCLK,
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GPIO77_LCD_BIAS,
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GPIO99_GPIO, /* Backlight */
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};
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static struct pxafb_mode_info balloon3_lcd_modes[] = {
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{
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.pixclock = 38000,
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.xres = 480,
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.yres = 640,
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.bpp = 16,
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.hsync_len = 8,
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.left_margin = 8,
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.right_margin = 8,
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.vsync_len = 2,
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.upper_margin = 4,
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.lower_margin = 5,
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.sync = 0,
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},
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};
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static struct pxafb_mach_info balloon3_pxafb_info = {
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.modes = balloon3_lcd_modes,
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.num_modes = ARRAY_SIZE(balloon3_lcd_modes),
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.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
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.pxafb_backlight_power = balloon3_backlight_power,
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};
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static unsigned long balloon3_mmc_pin_config[] = {
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GPIO32_MMC_CLK,
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GPIO92_MMC_DAT_0,
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GPIO109_MMC_DAT_1,
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GPIO110_MMC_DAT_2,
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GPIO111_MMC_DAT_3,
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GPIO112_MMC_CMD,
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};
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static void balloon3_mci_setpower(struct device *dev, unsigned int vdd)
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{
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struct pxamci_platform_data *p_d = dev->platform_data;
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if ((1 << vdd) & p_d->ocr_mask) {
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pr_debug("%s: on\n", __func__);
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/* FIXME something to prod here? */
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} else {
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pr_debug("%s: off\n", __func__);
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/* FIXME something to prod here? */
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}
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}
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static struct pxamci_platform_data balloon3_mci_platform_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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.setpower = balloon3_mci_setpower,
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};
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static int balloon3_udc_is_connected(void)
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{
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pr_debug("%s: udc connected\n", __func__);
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return 1;
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}
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static void balloon3_udc_command(int cmd)
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{
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switch (cmd) {
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case PXA2XX_UDC_CMD_CONNECT:
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UP2OCR |= (UP2OCR_DPPUE + UP2OCR_DPPUBE);
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pr_debug("%s: connect\n", __func__);
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break;
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case PXA2XX_UDC_CMD_DISCONNECT:
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UP2OCR &= ~UP2OCR_DPPUE;
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pr_debug("%s: disconnect\n", __func__);
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break;
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}
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}
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static struct pxa2xx_udc_mach_info balloon3_udc_info = {
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.udc_is_connected = balloon3_udc_is_connected,
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.udc_command = balloon3_udc_command,
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};
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static struct pxaficp_platform_data balloon3_ficp_platform_data = {
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.transceiver_cap = IR_SIRMODE | IR_FIRMODE | IR_OFF,
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};
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static unsigned long balloon3_ohci_pin_config[] = {
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GPIO88_USBH1_PWR,
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GPIO89_USBH1_PEN,
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};
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static struct pxaohci_platform_data balloon3_ohci_platform_data = {
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.port_mode = PMM_PERPORT_MODE,
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.flags = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
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};
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static unsigned long balloon3_pin_config[] __initdata = {
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/* Select BTUART 'COM1/ttyS0' as IO option for pins 42/43/44/45 */
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GPIO42_BTUART_RXD,
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GPIO43_BTUART_TXD,
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GPIO44_BTUART_CTS,
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GPIO45_BTUART_RTS,
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/* Wakeup GPIO */
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GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
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/* NAND & IDLE LED GPIOs */
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GPIO9_GPIO,
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GPIO10_GPIO,
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};
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static struct gpio_led balloon3_gpio_leds[] = {
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{
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.name = "balloon3:green:idle",
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.default_trigger = "heartbeat",
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.gpio = BALLOON3_GPIO_LED_IDLE,
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.active_low = 1,
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},
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{
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.name = "balloon3:green:nand",
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.default_trigger = "nand-disk",
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.gpio = BALLOON3_GPIO_LED_NAND,
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.active_low = 1,
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},
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};
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static struct gpio_led_platform_data balloon3_gpio_leds_platform_data = {
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.leds = balloon3_gpio_leds,
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.num_leds = ARRAY_SIZE(balloon3_gpio_leds),
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};
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static struct platform_device balloon3led_device = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &balloon3_gpio_leds_platform_data,
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},
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};
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static void __init balloon3_init(void)
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{
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pr_info("Initialising Balloon3\n");
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/* system bus arbiter setting
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* - Core_Park
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* - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
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*/
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ARB_CNTRL = ARB_CORE_PARK | 0x234;
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pxa_set_ffuart_info(NULL);
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pxa_set_btuart_info(NULL);
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pxa_set_stuart_info(NULL);
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pxa_set_i2c_info(NULL);
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if (balloon3_has(BALLOON3_FEATURE_AUDIO))
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pxa_set_ac97_info(NULL);
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if (balloon3_has(BALLOON3_FEATURE_TOPPOLY)) {
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pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_lcd_pin_config));
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gpio_request(BALLOON3_GPIO_RUN_BACKLIGHT,
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"LCD Backlight Power");
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gpio_direction_output(BALLOON3_GPIO_RUN_BACKLIGHT, 1);
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set_pxa_fb_info(&balloon3_pxafb_info);
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}
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if (balloon3_has(BALLOON3_FEATURE_MMC)) {
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pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_mmc_pin_config));
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pxa_set_mci_info(&balloon3_mci_platform_data);
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}
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pxa_set_ficp_info(&balloon3_ficp_platform_data);
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if (balloon3_has(BALLOON3_FEATURE_OHCI)) {
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pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ohci_pin_config));
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pxa_set_ohci_info(&balloon3_ohci_platform_data);
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}
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pxa_set_udc_info(&balloon3_udc_info);
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pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_pin_config));
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platform_device_register(&balloon3led_device);
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}
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static struct map_desc balloon3_io_desc[] __initdata = {
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{ /* CPLD/FPGA */
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.virtual = BALLOON3_FPGA_VIRT,
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.pfn = __phys_to_pfn(BALLOON3_FPGA_PHYS),
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.length = BALLOON3_FPGA_LENGTH,
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.type = MT_DEVICE,
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},
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};
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static void __init balloon3_map_io(void)
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{
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pxa_map_io();
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iotable_init(balloon3_io_desc, ARRAY_SIZE(balloon3_io_desc));
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}
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MACHINE_START(BALLOON3, "Balloon3")
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/* Maintainer: Nick Bane. */
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.phys_io = 0x40000000,
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.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
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.map_io = balloon3_map_io,
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.init_irq = balloon3_init_irq,
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.timer = &pxa_timer,
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.init_machine = balloon3_init,
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.boot_params = PHYS_OFFSET + 0x100,
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MACHINE_END
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