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linux-next/arch/arm/mach-pxa/pxa27x.c
Robert Jarzmik 1da10c17af ARM: pxa: add dma slave map 
In order to remove the specific knowledge of the dma mapping from PXA
drivers, add a default slave map for pxa architectures.

This is the first step, and once all drivers are converted,
pxad_filter_fn() will be made static, and the DMA resources removed from
device.c.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reported-by: Arnd Bergmann <arnd@arndb.de>
2018-06-18 21:29:16 +02:00

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/*
* linux/arch/arm/mach-pxa/pxa27x.c
*
* Author: Nicolas Pitre
* Created: Nov 05, 2002
* Copyright: MontaVista Software Inc.
*
* Code specific to PXA27x aka Bulverde.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/dmaengine.h>
#include <linux/dma/pxa-dma.h>
#include <linux/gpio.h>
#include <linux/gpio-pxa.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irqchip.h>
#include <linux/suspend.h>
#include <linux/platform_device.h>
#include <linux/syscore_ops.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/platform_data/i2c-pxa.h>
#include <linux/platform_data/mmp_dma.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/suspend.h>
#include <mach/irqs.h>
#include "pxa27x.h"
#include <mach/reset.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include "pm.h"
#include <mach/dma.h>
#include <mach/smemc.h>
#include "generic.h"
#include "devices.h"
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
void pxa27x_clear_otgph(void)
{
if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
PSSR |= PSSR_OTGPH;
}
EXPORT_SYMBOL(pxa27x_clear_otgph);
static unsigned long ac97_reset_config[] = {
GPIO113_AC97_nRESET_GPIO_HIGH,
GPIO113_AC97_nRESET,
GPIO95_AC97_nRESET_GPIO_HIGH,
GPIO95_AC97_nRESET,
};
void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio)
{
/*
* This helper function is used to work around a bug in the pxa27x's
* ac97 controller during a warm reset. The configuration of the
* reset_gpio is changed as follows:
* to_gpio == true: configured to generic output gpio and driven high
* to_gpio == false: configured to ac97 controller alt fn AC97_nRESET
*/
if (reset_gpio == 113)
pxa2xx_mfp_config(to_gpio ? &ac97_reset_config[0] :
&ac97_reset_config[1], 1);
if (reset_gpio == 95)
pxa2xx_mfp_config(to_gpio ? &ac97_reset_config[2] :
&ac97_reset_config[3], 1);
}
EXPORT_SYMBOL_GPL(pxa27x_configure_ac97reset);
#ifdef CONFIG_PM
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
/*
* allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
*/
static unsigned int pwrmode = PWRMODE_SLEEP;
int pxa27x_set_pwrmode(unsigned int mode)
{
switch (mode) {
case PWRMODE_SLEEP:
case PWRMODE_DEEPSLEEP:
pwrmode = mode;
return 0;
}
return -EINVAL;
}
/*
* List of global PXA peripheral registers to preserve.
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
enum {
SLEEP_SAVE_PSTR,
SLEEP_SAVE_MDREFR,
SLEEP_SAVE_PCFR,
SLEEP_SAVE_COUNT
};
void pxa27x_cpu_pm_save(unsigned long *sleep_save)
{
sleep_save[SLEEP_SAVE_MDREFR] = __raw_readl(MDREFR);
SAVE(PCFR);
SAVE(PSTR);
}
void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
{
__raw_writel(sleep_save[SLEEP_SAVE_MDREFR], MDREFR);
RESTORE(PCFR);
PSSR = PSSR_RDH | PSSR_PH;
RESTORE(PSTR);
}
void pxa27x_cpu_pm_enter(suspend_state_t state)
{
extern void pxa_cpu_standby(void);
#ifndef CONFIG_IWMMXT
u64 acc0;
asm volatile(".arch_extension xscale\n\t"
"mra %Q0, %R0, acc0" : "=r" (acc0));
#endif
/* ensure voltage-change sequencer not initiated, which hangs */
PCFR &= ~PCFR_FVC;
/* Clear edge-detect status register. */
PEDR = 0xDF12FE1B;
/* Clear reset status */
RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
switch (state) {
case PM_SUSPEND_STANDBY:
pxa_cpu_standby();
break;
case PM_SUSPEND_MEM:
cpu_suspend(pwrmode, pxa27x_finish_suspend);
#ifndef CONFIG_IWMMXT
asm volatile(".arch_extension xscale\n\t"
"mar acc0, %Q0, %R0" : "=r" (acc0));
#endif
break;
}
}
static int pxa27x_cpu_pm_valid(suspend_state_t state)
{
return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
}
static int pxa27x_cpu_pm_prepare(void)
{
/* set resume return address */
PSPR = __pa_symbol(cpu_resume);
return 0;
}
static void pxa27x_cpu_pm_finish(void)
{
/* ensure not to come back here if it wasn't intended */
PSPR = 0;
}
static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
.save_count = SLEEP_SAVE_COUNT,
.save = pxa27x_cpu_pm_save,
.restore = pxa27x_cpu_pm_restore,
.valid = pxa27x_cpu_pm_valid,
.enter = pxa27x_cpu_pm_enter,
.prepare = pxa27x_cpu_pm_prepare,
.finish = pxa27x_cpu_pm_finish,
};
static void __init pxa27x_init_pm(void)
{
pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
}
#else
static inline void pxa27x_init_pm(void) {}
#endif
/* PXA27x: Various gpios can issue wakeup events. This logic only
* handles the simple cases, not the WEMUX2 and WEMUX3 options
*/
static int pxa27x_set_wake(struct irq_data *d, unsigned int on)
{
int gpio = pxa_irq_to_gpio(d->irq);
uint32_t mask;
if (gpio >= 0 && gpio < 128)
return gpio_set_wake(gpio, on);
if (d->irq == IRQ_KEYPAD)
return keypad_set_wake(on);
switch (d->irq) {
case IRQ_RTCAlrm:
mask = PWER_RTC;
break;
case IRQ_USB:
mask = 1u << 26;
break;
default:
return -EINVAL;
}
if (on)
PWER |= mask;
else
PWER &=~mask;
return 0;
}
void __init pxa27x_init_irq(void)
{
pxa_init_irq(34, pxa27x_set_wake);
}
static int __init
pxa27x_dt_init_irq(struct device_node *node, struct device_node *parent)
{
pxa_dt_irq_init(pxa27x_set_wake);
set_handle_irq(ichp_handle_irq);
return 0;
}
IRQCHIP_DECLARE(pxa27x_intc, "marvell,pxa-intc", pxa27x_dt_init_irq);
static struct map_desc pxa27x_io_desc[] __initdata = {
{ /* Mem Ctl */
.virtual = (unsigned long)SMEMC_VIRT,
.pfn = __phys_to_pfn(PXA2XX_SMEMC_BASE),
.length = SMEMC_SIZE,
.type = MT_DEVICE
}, { /* UNCACHED_PHYS_0 */
.virtual = UNCACHED_PHYS_0,
.pfn = __phys_to_pfn(0x00000000),
.length = UNCACHED_PHYS_0_SIZE,
.type = MT_DEVICE
},
};
void __init pxa27x_map_io(void)
{
pxa_map_io();
iotable_init(ARRAY_AND_SIZE(pxa27x_io_desc));
pxa27x_get_clk_frequency_khz(1);
}
/*
* device registration specific to PXA27x.
*/
void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
{
local_irq_disable();
PCFR |= PCFR_PI2CEN;
local_irq_enable();
pxa_register_device(&pxa27x_device_i2c_power, info);
}
static struct pxa_gpio_platform_data pxa27x_gpio_info __initdata = {
.irq_base = PXA_GPIO_TO_IRQ(0),
.gpio_set_wake = gpio_set_wake,
};
static struct platform_device *devices[] __initdata = {
&pxa27x_device_udc,
&pxa_device_pmu,
&pxa_device_i2s,
&pxa_device_asoc_ssp1,
&pxa_device_asoc_ssp2,
&pxa_device_asoc_ssp3,
&pxa_device_asoc_platform,
&pxa_device_rtc,
&pxa27x_device_ssp1,
&pxa27x_device_ssp2,
&pxa27x_device_ssp3,
&pxa27x_device_pwm0,
&pxa27x_device_pwm1,
};
static const struct dma_slave_map pxa27x_slave_map[] = {
/* PXA25x, PXA27x and PXA3xx common entries */
{ "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
{ "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
{ "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
PDMA_FILTER_PARAM(LOWEST, 10) },
{ "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
{ "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
{ "pxa-ssp-dai.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
{ "pxa-ssp-dai.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
{ "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
{ "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
{ "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
{ "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
{ "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
{ "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
{ "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 66) },
{ "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 67) },
/* PXA27x specific map */
{ "pxa2xx-i2s", "rx", PDMA_FILTER_PARAM(LOWEST, 2) },
{ "pxa2xx-i2s", "tx", PDMA_FILTER_PARAM(LOWEST, 3) },
{ "pxa27x-camera.0", "CI_Y", PDMA_FILTER_PARAM(HIGHEST, 68) },
{ "pxa27x-camera.0", "CI_U", PDMA_FILTER_PARAM(HIGHEST, 69) },
{ "pxa27x-camera.0", "CI_V", PDMA_FILTER_PARAM(HIGHEST, 70) },
};
static struct mmp_dma_platdata pxa27x_dma_pdata = {
.dma_channels = 32,
.nb_requestors = 75,
.slave_map = pxa27x_slave_map,
.slave_map_cnt = ARRAY_SIZE(pxa27x_slave_map),
};
static int __init pxa27x_init(void)
{
int ret = 0;
if (cpu_is_pxa27x()) {
reset_status = RCSR;
pxa27x_init_pm();
register_syscore_ops(&pxa_irq_syscore_ops);
register_syscore_ops(&pxa2xx_mfp_syscore_ops);
if (!of_have_populated_dt()) {
pxa_register_device(&pxa27x_device_gpio,
&pxa27x_gpio_info);
pxa2xx_set_dmac_info(&pxa27x_dma_pdata);
ret = platform_add_devices(devices,
ARRAY_SIZE(devices));
}
}
return ret;
}
postcore_initcall(pxa27x_init);
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