From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/sh/intc/access.c | 246 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 246 insertions(+) create mode 100644 drivers/sh/intc/access.c (limited to 'drivers/sh/intc/access.c') diff --git a/drivers/sh/intc/access.c b/drivers/sh/intc/access.c new file mode 100644 index 0000000000..114390f967 --- /dev/null +++ b/drivers/sh/intc/access.c @@ -0,0 +1,246 @@ +/* + * Common INTC2 register accessors + * + * Copyright (C) 2007, 2008 Magnus Damm + * Copyright (C) 2009, 2010 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include +#include "internals.h" + +unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address) +{ + struct intc_window *window; + int k; + + /* scan through physical windows and convert address */ + for (k = 0; k < d->nr_windows; k++) { + window = d->window + k; + + if (address < window->phys) + continue; + + if (address >= (window->phys + window->size)) + continue; + + address -= window->phys; + address += (unsigned long)window->virt; + + return address; + } + + /* no windows defined, register must be 1:1 mapped virt:phys */ + return address; +} + +unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address) +{ + unsigned int k; + + address = intc_phys_to_virt(d, address); + + for (k = 0; k < d->nr_reg; k++) { + if (d->reg[k] == address) + return k; + } + + BUG(); + return 0; +} + +unsigned int intc_set_field_from_handle(unsigned int value, + unsigned int field_value, + unsigned int handle) +{ + unsigned int width = _INTC_WIDTH(handle); + unsigned int shift = _INTC_SHIFT(handle); + + value &= ~(((1 << width) - 1) << shift); + value |= field_value << shift; + return value; +} + +unsigned long intc_get_field_from_handle(unsigned int value, unsigned int handle) +{ + unsigned int width = _INTC_WIDTH(handle); + unsigned int shift = _INTC_SHIFT(handle); + unsigned int mask = ((1 << width) - 1) << shift; + + return (value & mask) >> shift; +} + +static unsigned long test_8(unsigned long addr, unsigned long h, + unsigned long ignore) +{ + void __iomem *ptr = (void __iomem *)addr; + return intc_get_field_from_handle(__raw_readb(ptr), h); +} + +static unsigned long test_16(unsigned long addr, unsigned long h, + unsigned long ignore) +{ + void __iomem *ptr = (void __iomem *)addr; + return intc_get_field_from_handle(__raw_readw(ptr), h); +} + +static unsigned long test_32(unsigned long addr, unsigned long h, + unsigned long ignore) +{ + void __iomem *ptr = (void __iomem *)addr; + return intc_get_field_from_handle(__raw_readl(ptr), h); +} + +static unsigned long write_8(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + __raw_writeb(intc_set_field_from_handle(0, data, h), ptr); + (void)__raw_readb(ptr); /* Defeat write posting */ + return 0; +} + +static unsigned long write_16(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + __raw_writew(intc_set_field_from_handle(0, data, h), ptr); + (void)__raw_readw(ptr); /* Defeat write posting */ + return 0; +} + +static unsigned long write_32(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + __raw_writel(intc_set_field_from_handle(0, data, h), ptr); + (void)__raw_readl(ptr); /* Defeat write posting */ + return 0; +} + +static unsigned long modify_8(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + unsigned long flags; + unsigned int value; + local_irq_save(flags); + value = intc_set_field_from_handle(__raw_readb(ptr), data, h); + __raw_writeb(value, ptr); + (void)__raw_readb(ptr); /* Defeat write posting */ + local_irq_restore(flags); + return 0; +} + +static unsigned long modify_16(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + unsigned long flags; + unsigned int value; + local_irq_save(flags); + value = intc_set_field_from_handle(__raw_readw(ptr), data, h); + __raw_writew(value, ptr); + (void)__raw_readw(ptr); /* Defeat write posting */ + local_irq_restore(flags); + return 0; +} + +static unsigned long modify_32(unsigned long addr, unsigned long h, + unsigned long data) +{ + void __iomem *ptr = (void __iomem *)addr; + unsigned long flags; + unsigned int value; + local_irq_save(flags); + value = intc_set_field_from_handle(__raw_readl(ptr), data, h); + __raw_writel(value, ptr); + (void)__raw_readl(ptr); /* Defeat write posting */ + local_irq_restore(flags); + return 0; +} + +static unsigned long intc_mode_field(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) +{ + return fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1)); +} + +static unsigned long intc_mode_zero(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) +{ + return fn(addr, handle, 0); +} + +static unsigned long intc_mode_prio(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) +{ + return fn(addr, handle, intc_get_prio_level(irq)); +} + +unsigned long (*intc_reg_fns[])(unsigned long addr, + unsigned long h, + unsigned long data) = { + [REG_FN_TEST_BASE + 0] = test_8, + [REG_FN_TEST_BASE + 1] = test_16, + [REG_FN_TEST_BASE + 3] = test_32, + [REG_FN_WRITE_BASE + 0] = write_8, + [REG_FN_WRITE_BASE + 1] = write_16, + [REG_FN_WRITE_BASE + 3] = write_32, + [REG_FN_MODIFY_BASE + 0] = modify_8, + [REG_FN_MODIFY_BASE + 1] = modify_16, + [REG_FN_MODIFY_BASE + 3] = modify_32, +}; + +unsigned long (*intc_enable_fns[])(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) = { + [MODE_ENABLE_REG] = intc_mode_field, + [MODE_MASK_REG] = intc_mode_zero, + [MODE_DUAL_REG] = intc_mode_field, + [MODE_PRIO_REG] = intc_mode_prio, + [MODE_PCLR_REG] = intc_mode_prio, +}; + +unsigned long (*intc_disable_fns[])(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) = { + [MODE_ENABLE_REG] = intc_mode_zero, + [MODE_MASK_REG] = intc_mode_field, + [MODE_DUAL_REG] = intc_mode_field, + [MODE_PRIO_REG] = intc_mode_zero, + [MODE_PCLR_REG] = intc_mode_field, +}; + +unsigned long (*intc_enable_noprio_fns[])(unsigned long addr, + unsigned long handle, + unsigned long (*fn)(unsigned long, + unsigned long, + unsigned long), + unsigned int irq) = { + [MODE_ENABLE_REG] = intc_mode_field, + [MODE_MASK_REG] = intc_mode_zero, + [MODE_DUAL_REG] = intc_mode_field, + [MODE_PRIO_REG] = intc_mode_field, + [MODE_PCLR_REG] = intc_mode_field, +}; -- cgit v1.2.3