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|
/*
* Platform support for LPC32xx SoC
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
* Copyright (C) 2010 NXP Semiconductors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/spi/eeprom.h>
#include <linux/gpio.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/amba/pl022.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/amba/pl08x.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include <mach/board.h>
#include <mach/gpio-lpc32xx.h>
#include "common.h"
/*
* Mapped GPIOLIB GPIOs
*/
#define SPI0_CS_GPIO LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 5)
#define LCD_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 0)
#define BKL_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 4)
/*
* AMBA LCD controller
*/
static struct clcd_panel conn_lcd_panel = {
.mode = {
.name = "QVGA portrait",
.refresh = 60,
.xres = 240,
.yres = 320,
.pixclock = 191828,
.left_margin = 22,
.right_margin = 11,
.upper_margin = 2,
.lower_margin = 1,
.hsync_len = 5,
.vsync_len = 2,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
},
.width = -1,
.height = -1,
.tim2 = (TIM2_IVS | TIM2_IHS),
.cntl = (CNTL_BGR | CNTL_LCDTFT | CNTL_LCDVCOMP(1) |
CNTL_LCDBPP16_565),
.bpp = 16,
};
#define PANEL_SIZE (3 * SZ_64K)
static int lpc32xx_clcd_setup(struct clcd_fb *fb)
{
dma_addr_t dma;
fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev,
PANEL_SIZE, &dma, GFP_KERNEL);
if (!fb->fb.screen_base) {
printk(KERN_ERR "CLCD: unable to map framebuffer\n");
return -ENOMEM;
}
fb->fb.fix.smem_start = dma;
fb->fb.fix.smem_len = PANEL_SIZE;
fb->panel = &conn_lcd_panel;
if (gpio_request(LCD_POWER_GPIO, "LCD power"))
printk(KERN_ERR "Error requesting gpio %u",
LCD_POWER_GPIO);
else if (gpio_direction_output(LCD_POWER_GPIO, 1))
printk(KERN_ERR "Error setting gpio %u to output",
LCD_POWER_GPIO);
if (gpio_request(BKL_POWER_GPIO, "LCD backlight power"))
printk(KERN_ERR "Error requesting gpio %u",
BKL_POWER_GPIO);
else if (gpio_direction_output(BKL_POWER_GPIO, 1))
printk(KERN_ERR "Error setting gpio %u to output",
BKL_POWER_GPIO);
return 0;
}
static int lpc32xx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
{
return dma_mmap_writecombine(&fb->dev->dev, vma,
fb->fb.screen_base, fb->fb.fix.smem_start,
fb->fb.fix.smem_len);
}
static void lpc32xx_clcd_remove(struct clcd_fb *fb)
{
dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
fb->fb.screen_base, fb->fb.fix.smem_start);
}
/*
* On some early LCD modules (1307.0), the backlight logic is inverted.
* For those board variants, swap the disable and enable states for
* BKL_POWER_GPIO.
*/
static void clcd_disable(struct clcd_fb *fb)
{
gpio_set_value(BKL_POWER_GPIO, 0);
gpio_set_value(LCD_POWER_GPIO, 0);
}
static void clcd_enable(struct clcd_fb *fb)
{
gpio_set_value(BKL_POWER_GPIO, 1);
gpio_set_value(LCD_POWER_GPIO, 1);
}
static struct clcd_board lpc32xx_clcd_data = {
.name = "Phytec LCD",
.check = clcdfb_check,
.decode = clcdfb_decode,
.disable = clcd_disable,
.enable = clcd_enable,
.setup = lpc32xx_clcd_setup,
.mmap = lpc32xx_clcd_mmap,
.remove = lpc32xx_clcd_remove,
};
/*
* AMBA SSP (SPI)
*/
static void phy3250_spi_cs_set(u32 control)
{
gpio_set_value(SPI0_CS_GPIO, (int) control);
}
static struct pl022_config_chip spi0_chip_info = {
.com_mode = INTERRUPT_TRANSFER,
.iface = SSP_INTERFACE_MOTOROLA_SPI,
.hierarchy = SSP_MASTER,
.slave_tx_disable = 0,
.rx_lev_trig = SSP_RX_4_OR_MORE_ELEM,
.tx_lev_trig = SSP_TX_4_OR_MORE_EMPTY_LOC,
.ctrl_len = SSP_BITS_8,
.wait_state = SSP_MWIRE_WAIT_ZERO,
.duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
.cs_control = phy3250_spi_cs_set,
};
static struct pl022_ssp_controller lpc32xx_ssp0_data = {
.bus_id = 0,
.num_chipselect = 1,
.enable_dma = 0,
};
static struct pl022_ssp_controller lpc32xx_ssp1_data = {
.bus_id = 1,
.num_chipselect = 1,
.enable_dma = 0,
};
/* AT25 driver registration */
static int __init phy3250_spi_board_register(void)
{
#if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE)
static struct spi_board_info info[] = {
{
.modalias = "spidev",
.max_speed_hz = 5000000,
.bus_num = 0,
.chip_select = 0,
.controller_data = &spi0_chip_info,
},
};
#else
static struct spi_eeprom eeprom = {
.name = "at25256a",
.byte_len = 0x8000,
.page_size = 64,
.flags = EE_ADDR2,
};
static struct spi_board_info info[] = {
{
.modalias = "at25",
.max_speed_hz = 5000000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
.platform_data = &eeprom,
.controller_data = &spi0_chip_info,
},
};
#endif
return spi_register_board_info(info, ARRAY_SIZE(info));
}
arch_initcall(phy3250_spi_board_register);
static struct pl08x_platform_data pl08x_pd = {
};
static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = {
OF_DEV_AUXDATA("arm,pl022", 0x20084000, "dev:ssp0", &lpc32xx_ssp0_data),
OF_DEV_AUXDATA("arm,pl022", 0x2008C000, "dev:ssp1", &lpc32xx_ssp1_data),
OF_DEV_AUXDATA("arm,pl110", 0x31040000, "dev:clcd", &lpc32xx_clcd_data),
OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd),
{ }
};
static void __init lpc3250_machine_init(void)
{
u32 tmp;
/* Setup SLC NAND controller muxing */
__raw_writel(LPC32XX_CLKPWR_NANDCLK_SEL_SLC,
LPC32XX_CLKPWR_NAND_CLK_CTRL);
/* Setup LCD muxing to RGB565 */
tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL) &
~(LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_MSK |
LPC32XX_CLKPWR_LCDCTRL_PSCALE_MSK);
tmp |= LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_TFT16;
__raw_writel(tmp, LPC32XX_CLKPWR_LCDCLK_CTRL);
/* Set up USB power */
tmp = __raw_readl(LPC32XX_CLKPWR_USB_CTRL);
tmp |= LPC32XX_CLKPWR_USBCTRL_HCLK_EN |
LPC32XX_CLKPWR_USBCTRL_USBI2C_EN;
__raw_writel(tmp, LPC32XX_CLKPWR_USB_CTRL);
/* Set up I2C pull levels */
tmp = __raw_readl(LPC32XX_CLKPWR_I2C_CLK_CTRL);
tmp |= LPC32XX_CLKPWR_I2CCLK_USBI2CHI_DRIVE |
LPC32XX_CLKPWR_I2CCLK_I2C2HI_DRIVE;
__raw_writel(tmp, LPC32XX_CLKPWR_I2C_CLK_CTRL);
/* Disable IrDA pulsing support on UART6 */
tmp = __raw_readl(LPC32XX_UARTCTL_CTRL);
tmp |= LPC32XX_UART_UART6_IRDAMOD_BYPASS;
__raw_writel(tmp, LPC32XX_UARTCTL_CTRL);
/* Enable DMA for I2S1 channel */
tmp = __raw_readl(LPC32XX_CLKPWR_I2S_CLK_CTRL);
tmp = LPC32XX_CLKPWR_I2SCTRL_I2S1_USE_DMA;
__raw_writel(tmp, LPC32XX_CLKPWR_I2S_CLK_CTRL);
lpc32xx_serial_init();
/*
* AMBA peripheral clocks need to be enabled prior to AMBA device
* detection or a data fault will occur, so enable the clocks
* here.
*/
tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL);
__raw_writel((tmp | LPC32XX_CLKPWR_LCDCTRL_CLK_EN),
LPC32XX_CLKPWR_LCDCLK_CTRL);
tmp = __raw_readl(LPC32XX_CLKPWR_SSP_CLK_CTRL);
__raw_writel((tmp | LPC32XX_CLKPWR_SSPCTRL_SSPCLK0_EN),
LPC32XX_CLKPWR_SSP_CLK_CTRL);
tmp = __raw_readl(LPC32XX_CLKPWR_DMA_CLK_CTRL);
__raw_writel((tmp | LPC32XX_CLKPWR_DMACLKCTRL_CLK_EN),
LPC32XX_CLKPWR_DMA_CLK_CTRL);
/* Test clock needed for UDA1380 initial init */
__raw_writel(LPC32XX_CLKPWR_TESTCLK2_SEL_MOSC |
LPC32XX_CLKPWR_TESTCLK_TESTCLK2_EN,
LPC32XX_CLKPWR_TEST_CLK_SEL);
of_platform_populate(NULL, of_default_bus_match_table,
lpc32xx_auxdata_lookup, NULL);
/* Register GPIOs used on this board */
if (gpio_request(SPI0_CS_GPIO, "spi0 cs"))
printk(KERN_ERR "Error requesting gpio %u",
SPI0_CS_GPIO);
else if (gpio_direction_output(SPI0_CS_GPIO, 1))
printk(KERN_ERR "Error setting gpio %u to output",
SPI0_CS_GPIO);
}
static char const *lpc32xx_dt_compat[] __initdata = {
"nxp,lpc3220",
"nxp,lpc3230",
"nxp,lpc3240",
"nxp,lpc3250",
NULL
};
DT_MACHINE_START(LPC32XX_DT, "LPC32XX SoC (Flattened Device Tree)")
.atag_offset = 0x100,
.map_io = lpc32xx_map_io,
.init_irq = lpc32xx_init_irq,
.timer = &lpc32xx_timer,
.init_machine = lpc3250_machine_init,
.dt_compat = lpc32xx_dt_compat,
.restart = lpc23xx_restart,
MACHINE_END
|
