81d7cac4d1
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> [mpe: Fixup maple/setup.c which needs platform_device] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org
218 lines
5.1 KiB
C
218 lines
5.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Common CPM code
|
|
*
|
|
* Author: Scott Wood <scottwood@freescale.com>
|
|
*
|
|
* Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
|
|
*
|
|
* Some parts derived from commproc.c/cpm2_common.c, which is:
|
|
* Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
|
|
* Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
|
|
* Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
|
|
* 2006 (c) MontaVista Software, Inc.
|
|
* Vitaly Bordug <vbordug@ru.mvista.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/export.h>
|
|
#include <linux/of.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/udbg.h>
|
|
#include <asm/io.h>
|
|
#include <asm/cpm.h>
|
|
#include <asm/fixmap.h>
|
|
#include <soc/fsl/qe/qe.h>
|
|
|
|
#include <mm/mmu_decl.h>
|
|
|
|
#if defined(CONFIG_CPM2) || defined(CONFIG_8xx_GPIO)
|
|
#include <linux/gpio/legacy-of-mm-gpiochip.h>
|
|
#endif
|
|
|
|
static int __init cpm_init(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
|
|
if (!np)
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,cpm2");
|
|
if (!np)
|
|
return -ENODEV;
|
|
cpm_muram_init();
|
|
of_node_put(np);
|
|
return 0;
|
|
}
|
|
subsys_initcall(cpm_init);
|
|
|
|
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
|
|
static u32 __iomem *cpm_udbg_txdesc;
|
|
static u8 __iomem *cpm_udbg_txbuf;
|
|
|
|
static void udbg_putc_cpm(char c)
|
|
{
|
|
if (c == '\n')
|
|
udbg_putc_cpm('\r');
|
|
|
|
while (in_be32(&cpm_udbg_txdesc[0]) & 0x80000000)
|
|
;
|
|
|
|
out_8(cpm_udbg_txbuf, c);
|
|
out_be32(&cpm_udbg_txdesc[0], 0xa0000001);
|
|
}
|
|
|
|
void __init udbg_init_cpm(void)
|
|
{
|
|
#ifdef CONFIG_PPC_8xx
|
|
mmu_mapin_immr();
|
|
|
|
cpm_udbg_txdesc = (u32 __iomem __force *)
|
|
(CONFIG_PPC_EARLY_DEBUG_CPM_ADDR - PHYS_IMMR_BASE +
|
|
VIRT_IMMR_BASE);
|
|
cpm_udbg_txbuf = (u8 __iomem __force *)
|
|
(in_be32(&cpm_udbg_txdesc[1]) - PHYS_IMMR_BASE +
|
|
VIRT_IMMR_BASE);
|
|
#else
|
|
cpm_udbg_txdesc = (u32 __iomem __force *)
|
|
CONFIG_PPC_EARLY_DEBUG_CPM_ADDR;
|
|
cpm_udbg_txbuf = (u8 __iomem __force *)in_be32(&cpm_udbg_txdesc[1]);
|
|
#endif
|
|
|
|
if (cpm_udbg_txdesc) {
|
|
#ifdef CONFIG_CPM2
|
|
setbat(1, 0xf0000000, 0xf0000000, 1024*1024, PAGE_KERNEL_NCG);
|
|
#endif
|
|
udbg_putc = udbg_putc_cpm;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPM2) || defined(CONFIG_8xx_GPIO)
|
|
|
|
struct cpm2_ioports {
|
|
u32 dir, par, sor, odr, dat;
|
|
u32 res[3];
|
|
};
|
|
|
|
struct cpm2_gpio32_chip {
|
|
struct of_mm_gpio_chip mm_gc;
|
|
spinlock_t lock;
|
|
|
|
/* shadowed data register to clear/set bits safely */
|
|
u32 cpdata;
|
|
};
|
|
|
|
static void cpm2_gpio32_save_regs(struct of_mm_gpio_chip *mm_gc)
|
|
{
|
|
struct cpm2_gpio32_chip *cpm2_gc =
|
|
container_of(mm_gc, struct cpm2_gpio32_chip, mm_gc);
|
|
struct cpm2_ioports __iomem *iop = mm_gc->regs;
|
|
|
|
cpm2_gc->cpdata = in_be32(&iop->dat);
|
|
}
|
|
|
|
static int cpm2_gpio32_get(struct gpio_chip *gc, unsigned int gpio)
|
|
{
|
|
struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
|
|
struct cpm2_ioports __iomem *iop = mm_gc->regs;
|
|
u32 pin_mask;
|
|
|
|
pin_mask = 1 << (31 - gpio);
|
|
|
|
return !!(in_be32(&iop->dat) & pin_mask);
|
|
}
|
|
|
|
static void __cpm2_gpio32_set(struct of_mm_gpio_chip *mm_gc, u32 pin_mask,
|
|
int value)
|
|
{
|
|
struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(&mm_gc->gc);
|
|
struct cpm2_ioports __iomem *iop = mm_gc->regs;
|
|
|
|
if (value)
|
|
cpm2_gc->cpdata |= pin_mask;
|
|
else
|
|
cpm2_gc->cpdata &= ~pin_mask;
|
|
|
|
out_be32(&iop->dat, cpm2_gc->cpdata);
|
|
}
|
|
|
|
static void cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
|
|
{
|
|
struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
|
|
struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
|
|
unsigned long flags;
|
|
u32 pin_mask = 1 << (31 - gpio);
|
|
|
|
spin_lock_irqsave(&cpm2_gc->lock, flags);
|
|
|
|
__cpm2_gpio32_set(mm_gc, pin_mask, value);
|
|
|
|
spin_unlock_irqrestore(&cpm2_gc->lock, flags);
|
|
}
|
|
|
|
static int cpm2_gpio32_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
|
|
{
|
|
struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
|
|
struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
|
|
struct cpm2_ioports __iomem *iop = mm_gc->regs;
|
|
unsigned long flags;
|
|
u32 pin_mask = 1 << (31 - gpio);
|
|
|
|
spin_lock_irqsave(&cpm2_gc->lock, flags);
|
|
|
|
setbits32(&iop->dir, pin_mask);
|
|
__cpm2_gpio32_set(mm_gc, pin_mask, val);
|
|
|
|
spin_unlock_irqrestore(&cpm2_gc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cpm2_gpio32_dir_in(struct gpio_chip *gc, unsigned int gpio)
|
|
{
|
|
struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
|
|
struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
|
|
struct cpm2_ioports __iomem *iop = mm_gc->regs;
|
|
unsigned long flags;
|
|
u32 pin_mask = 1 << (31 - gpio);
|
|
|
|
spin_lock_irqsave(&cpm2_gc->lock, flags);
|
|
|
|
clrbits32(&iop->dir, pin_mask);
|
|
|
|
spin_unlock_irqrestore(&cpm2_gc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cpm2_gpiochip_add32(struct device *dev)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
struct cpm2_gpio32_chip *cpm2_gc;
|
|
struct of_mm_gpio_chip *mm_gc;
|
|
struct gpio_chip *gc;
|
|
|
|
cpm2_gc = kzalloc(sizeof(*cpm2_gc), GFP_KERNEL);
|
|
if (!cpm2_gc)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&cpm2_gc->lock);
|
|
|
|
mm_gc = &cpm2_gc->mm_gc;
|
|
gc = &mm_gc->gc;
|
|
|
|
mm_gc->save_regs = cpm2_gpio32_save_regs;
|
|
gc->ngpio = 32;
|
|
gc->direction_input = cpm2_gpio32_dir_in;
|
|
gc->direction_output = cpm2_gpio32_dir_out;
|
|
gc->get = cpm2_gpio32_get;
|
|
gc->set = cpm2_gpio32_set;
|
|
gc->parent = dev;
|
|
gc->owner = THIS_MODULE;
|
|
|
|
return of_mm_gpiochip_add_data(np, mm_gc, cpm2_gc);
|
|
}
|
|
#endif /* CONFIG_CPM2 || CONFIG_8xx_GPIO */
|