forked from Minki/linux
26dd3e4ff9
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of some code where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace/add as needed. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Build coverage of all the mips defconfigs revealed the module.h header was masking a couple of implicit include instances, so we add the appropriate headers there. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: David Daney <david.daney@cavium.com> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15131/ [james.hogan@imgtec.com: Preserve sort order where it already exists] Signed-off-by: James Hogan <james.hogan@imgtec.com>
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
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* bcsr.h -- Db1xxx/Pb1xxx Devboard CPLD registers ("BCSR") abstraction.
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*
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* All Alchemy development boards (except, of course, the weird PB1000)
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* have a few registers in a CPLD with standardised layout; they mostly
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* only differ in base address.
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* All registers are 16bits wide with 32bit spacing.
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*/
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#include <linux/interrupt.h>
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#include <linux/irqchip/chained_irq.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/spinlock.h>
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#include <linux/irq.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/mach-db1x00/bcsr.h>
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static struct bcsr_reg {
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void __iomem *raddr;
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spinlock_t lock;
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} bcsr_regs[BCSR_CNT];
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static void __iomem *bcsr_virt; /* KSEG1 addr of BCSR base */
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static int bcsr_csc_base; /* linux-irq of first cascaded irq */
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void __init bcsr_init(unsigned long bcsr1_phys, unsigned long bcsr2_phys)
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{
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int i;
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bcsr1_phys = KSEG1ADDR(CPHYSADDR(bcsr1_phys));
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bcsr2_phys = KSEG1ADDR(CPHYSADDR(bcsr2_phys));
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bcsr_virt = (void __iomem *)bcsr1_phys;
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for (i = 0; i < BCSR_CNT; i++) {
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if (i >= BCSR_HEXLEDS)
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bcsr_regs[i].raddr = (void __iomem *)bcsr2_phys +
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(0x04 * (i - BCSR_HEXLEDS));
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else
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bcsr_regs[i].raddr = (void __iomem *)bcsr1_phys +
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(0x04 * i);
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spin_lock_init(&bcsr_regs[i].lock);
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}
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}
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unsigned short bcsr_read(enum bcsr_id reg)
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{
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unsigned short r;
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unsigned long flags;
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spin_lock_irqsave(&bcsr_regs[reg].lock, flags);
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r = __raw_readw(bcsr_regs[reg].raddr);
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spin_unlock_irqrestore(&bcsr_regs[reg].lock, flags);
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return r;
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}
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EXPORT_SYMBOL_GPL(bcsr_read);
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void bcsr_write(enum bcsr_id reg, unsigned short val)
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{
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unsigned long flags;
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spin_lock_irqsave(&bcsr_regs[reg].lock, flags);
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__raw_writew(val, bcsr_regs[reg].raddr);
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wmb();
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spin_unlock_irqrestore(&bcsr_regs[reg].lock, flags);
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}
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EXPORT_SYMBOL_GPL(bcsr_write);
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void bcsr_mod(enum bcsr_id reg, unsigned short clr, unsigned short set)
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{
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unsigned short r;
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unsigned long flags;
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spin_lock_irqsave(&bcsr_regs[reg].lock, flags);
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r = __raw_readw(bcsr_regs[reg].raddr);
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r &= ~clr;
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r |= set;
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__raw_writew(r, bcsr_regs[reg].raddr);
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wmb();
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spin_unlock_irqrestore(&bcsr_regs[reg].lock, flags);
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}
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EXPORT_SYMBOL_GPL(bcsr_mod);
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/*
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* DB1200/PB1200 CPLD IRQ muxer
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*/
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static void bcsr_csc_handler(struct irq_desc *d)
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{
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unsigned short bisr = __raw_readw(bcsr_virt + BCSR_REG_INTSTAT);
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struct irq_chip *chip = irq_desc_get_chip(d);
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chained_irq_enter(chip, d);
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generic_handle_irq(bcsr_csc_base + __ffs(bisr));
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chained_irq_exit(chip, d);
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}
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static void bcsr_irq_mask(struct irq_data *d)
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{
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unsigned short v = 1 << (d->irq - bcsr_csc_base);
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__raw_writew(v, bcsr_virt + BCSR_REG_MASKCLR);
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wmb();
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}
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static void bcsr_irq_maskack(struct irq_data *d)
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{
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unsigned short v = 1 << (d->irq - bcsr_csc_base);
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__raw_writew(v, bcsr_virt + BCSR_REG_MASKCLR);
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__raw_writew(v, bcsr_virt + BCSR_REG_INTSTAT); /* ack */
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wmb();
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}
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static void bcsr_irq_unmask(struct irq_data *d)
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{
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unsigned short v = 1 << (d->irq - bcsr_csc_base);
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__raw_writew(v, bcsr_virt + BCSR_REG_MASKSET);
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wmb();
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}
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static struct irq_chip bcsr_irq_type = {
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.name = "CPLD",
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.irq_mask = bcsr_irq_mask,
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.irq_mask_ack = bcsr_irq_maskack,
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.irq_unmask = bcsr_irq_unmask,
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};
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void __init bcsr_init_irq(int csc_start, int csc_end, int hook_irq)
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{
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unsigned int irq;
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/* mask & enable & ack all */
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__raw_writew(0xffff, bcsr_virt + BCSR_REG_MASKCLR);
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__raw_writew(0xffff, bcsr_virt + BCSR_REG_INTSET);
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__raw_writew(0xffff, bcsr_virt + BCSR_REG_INTSTAT);
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wmb();
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bcsr_csc_base = csc_start;
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for (irq = csc_start; irq <= csc_end; irq++)
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irq_set_chip_and_handler_name(irq, &bcsr_irq_type,
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handle_level_irq, "level");
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irq_set_chained_handler(hook_irq, bcsr_csc_handler);
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}
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