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kernel-fxtec-pro1x/arch/powerpc/platforms/82xx/km82xx.c
Holger Brunck 5d1d67e361 powerpc/82xx: add SPI support for mgcoge 
Add spi support for mgcoge into the platform code and the dts
file. Additionaly SPIDEV is switched on in the defconfig and the
updates for the newer kernel version are committed. The SPI
interface is used to drive the Maxim DS3106 clock chip.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2012-07-10 07:07:20 -05:00

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/*
* Keymile km82xx support
* Copyright 2008-2011 DENX Software Engineering GmbH
* Author: Heiko Schocher <hs@denx.de>
*
* based on code from:
* Copyright 2007 Freescale Semiconductor, Inc.
* Author: Scott Wood <scottwood@freescale.com>
*
* 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.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/of_platform.h>
#include <asm/io.h>
#include <asm/cpm2.h>
#include <asm/udbg.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/mpc8260.h>
#include <asm/prom.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/cpm2_pic.h>
#include "pq2.h"
static void __init km82xx_pic_init(void)
{
struct device_node *np = of_find_compatible_node(NULL, NULL,
"fsl,pq2-pic");
if (!np) {
printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
return;
}
cpm2_pic_init(np);
of_node_put(np);
}
struct cpm_pin {
int port, pin, flags;
};
static __initdata struct cpm_pin km82xx_pins[] = {
/* SMC1 */
{2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
/* SMC2 */
{0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
/* SCC1 */
{2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
/* SCC4 */
{2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
/* FCC1 */
{0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* FCC2 */
{1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* MDC */
{0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO},
#if defined(CONFIG_I2C_CPM)
/* I2C */
{3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
{3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
#endif
/* USB */
{0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /* FULL_SPEED */
{0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /*/SLAVE */
{2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXN */
{2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXP */
{2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */
{2, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXCLK */
{3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */
{3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */
{3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXD */
/* SPI */
{3, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MISO PD16 */
{3, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MOSI PD17 */
{3, 18, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_CLK PD18 */
};
static void __init init_ioports(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) {
const struct cpm_pin *pin = &km82xx_pins[i];
cpm2_set_pin(pin->port, pin->pin, pin->flags);
}
cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX);
cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
/* Force USB FULL SPEED bit to '1' */
setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10));
/* clear USB_SLAVE */
clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11));
}
static void __init km82xx_setup_arch(void)
{
if (ppc_md.progress)
ppc_md.progress("km82xx_setup_arch()", 0);
cpm2_reset();
/* When this is set, snooping CPM DMA from RAM causes
* machine checks. See erratum SIU18.
*/
clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
init_ioports();
if (ppc_md.progress)
ppc_md.progress("km82xx_setup_arch(), finish", 0);
}
static __initdata struct of_device_id of_bus_ids[] = {
{ .compatible = "simple-bus", },
{},
};
static int __init declare_of_platform_devices(void)
{
of_platform_bus_probe(NULL, of_bus_ids, NULL);
return 0;
}
machine_device_initcall(km82xx, declare_of_platform_devices);
/*
* Called very early, device-tree isn't unflattened
*/
static int __init km82xx_probe(void)
{
unsigned long root = of_get_flat_dt_root();
return of_flat_dt_is_compatible(root, "keymile,km82xx");
}
define_machine(km82xx)
{
.name = "Keymile km82xx",
.probe = km82xx_probe,
.setup_arch = km82xx_setup_arch,
.init_IRQ = km82xx_pic_init,
.get_irq = cpm2_get_irq,
.calibrate_decr = generic_calibrate_decr,
.restart = pq2_restart,
.progress = udbg_progress,
};
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