a5d28c8e64
Initialize I2C pins on boards with CPM1/CPM2 controllers and document the i2c bus in booting-without-of. The boards don't have any I2C chips connected to the I2C bus, so unless some external chips are connected to the boards, this code is just an example of setting everything else up. Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*arch/powerpc/platforms/8xx/mpc86xads_setup.c
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*
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* Platform setup for the Freescale mpc86xads board
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*
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* Vitaly Bordug <vbordug@ru.mvista.com>
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*
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* Copyright 2005 MontaVista Software Inc.
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*
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* Heavily modified by Scott Wood <scottwood@freescale.com>
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* Copyright 2007 Freescale Semiconductor, Inc.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/init.h>
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#include <linux/of_platform.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/8xx_immap.h>
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#include <asm/cpm1.h>
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#include <asm/fs_pd.h>
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#include <asm/udbg.h>
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#include "mpc86xads.h"
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#include "mpc8xx.h"
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struct cpm_pin {
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int port, pin, flags;
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};
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static struct cpm_pin mpc866ads_pins[] = {
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/* SMC1 */
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{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
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{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
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/* SMC2 */
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{CPM_PORTB, 21, CPM_PIN_INPUT}, /* RX */
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{CPM_PORTB, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
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/* SCC1 */
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{CPM_PORTA, 6, CPM_PIN_INPUT}, /* CLK1 */
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{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
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{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
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{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
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{CPM_PORTB, 19, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
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{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
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{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
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/* MII */
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{CPM_PORTD, 3, CPM_PIN_OUTPUT},
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{CPM_PORTD, 4, CPM_PIN_OUTPUT},
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{CPM_PORTD, 5, CPM_PIN_OUTPUT},
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{CPM_PORTD, 6, CPM_PIN_OUTPUT},
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{CPM_PORTD, 7, CPM_PIN_OUTPUT},
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{CPM_PORTD, 8, CPM_PIN_OUTPUT},
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{CPM_PORTD, 9, CPM_PIN_OUTPUT},
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{CPM_PORTD, 10, CPM_PIN_OUTPUT},
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{CPM_PORTD, 11, CPM_PIN_OUTPUT},
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{CPM_PORTD, 12, CPM_PIN_OUTPUT},
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{CPM_PORTD, 13, CPM_PIN_OUTPUT},
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{CPM_PORTD, 14, CPM_PIN_OUTPUT},
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{CPM_PORTD, 15, CPM_PIN_OUTPUT},
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/* I2C */
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{CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
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{CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
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};
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static void __init init_ioports(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(mpc866ads_pins); i++) {
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struct cpm_pin *pin = &mpc866ads_pins[i];
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cpm1_set_pin(pin->port, pin->pin, pin->flags);
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}
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cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
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cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
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cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK1, CPM_CLK_TX);
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cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
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/* Set FEC1 and FEC2 to MII mode */
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clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
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}
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static void __init mpc86xads_setup_arch(void)
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{
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struct device_node *np;
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u32 __iomem *bcsr_io;
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cpm_reset();
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init_ioports();
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np = of_find_compatible_node(NULL, NULL, "fsl,mpc866ads-bcsr");
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if (!np) {
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printk(KERN_CRIT "Could not find fsl,mpc866ads-bcsr node\n");
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return;
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}
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bcsr_io = of_iomap(np, 0);
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of_node_put(np);
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if (bcsr_io == NULL) {
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printk(KERN_CRIT "Could not remap BCSR\n");
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return;
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}
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clrbits32(bcsr_io, BCSR1_RS232EN_1 | BCSR1_RS232EN_2 | BCSR1_ETHEN);
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iounmap(bcsr_io);
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}
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static int __init mpc86xads_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "fsl,mpc866ads");
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}
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static struct of_device_id __initdata of_bus_ids[] = {
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{ .name = "soc", },
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{ .name = "cpm", },
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{ .name = "localbus", },
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{},
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};
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static int __init declare_of_platform_devices(void)
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{
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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machine_device_initcall(mpc86x_ads, declare_of_platform_devices);
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define_machine(mpc86x_ads) {
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.name = "MPC86x ADS",
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.probe = mpc86xads_probe,
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.setup_arch = mpc86xads_setup_arch,
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.init_IRQ = mpc8xx_pics_init,
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.get_irq = mpc8xx_get_irq,
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.restart = mpc8xx_restart,
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.calibrate_decr = mpc8xx_calibrate_decr,
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.set_rtc_time = mpc8xx_set_rtc_time,
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.get_rtc_time = mpc8xx_get_rtc_time,
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.progress = udbg_progress,
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};
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