mirror of https://gitee.com/openkylin/linux.git
1306 lines
32 KiB
C
1306 lines
32 KiB
C
/*
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* linux/arch/arm/common/sa1111.c
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*
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* SA1111 support
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*
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* Original code by John Dorsey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This file contains all generic SA1111 support.
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*
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* All initialization functions provided here are intended to be called
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* from machine specific code with proper arguments when required.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/dma-mapping.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <asm/sizes.h>
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#include <asm/hardware/sa1111.h>
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extern void __init sa1110_mb_enable(void);
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/*
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* We keep the following data for the overall SA1111. Note that the
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* struct device and struct resource are "fake"; they should be supplied
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* by the bus above us. However, in the interests of getting all SA1111
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* drivers converted over to the device model, we provide this as an
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* anchor point for all the other drivers.
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*/
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struct sa1111 {
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struct device *dev;
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struct clk *clk;
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unsigned long phys;
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int irq;
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spinlock_t lock;
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void __iomem *base;
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#ifdef CONFIG_PM
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void *saved_state;
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#endif
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};
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/*
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* We _really_ need to eliminate this. Its only users
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* are the PWM and DMA checking code.
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*/
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static struct sa1111 *g_sa1111;
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struct sa1111_dev_info {
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unsigned long offset;
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unsigned long skpcr_mask;
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unsigned int devid;
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unsigned int irq[6];
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};
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static struct sa1111_dev_info sa1111_devices[] = {
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{
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.offset = SA1111_USB,
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.skpcr_mask = SKPCR_UCLKEN,
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.devid = SA1111_DEVID_USB,
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.irq = {
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IRQ_USBPWR,
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IRQ_HCIM,
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IRQ_HCIBUFFACC,
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IRQ_HCIRMTWKP,
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IRQ_NHCIMFCIR,
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IRQ_USB_PORT_RESUME
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},
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},
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{
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.offset = 0x0600,
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.skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
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.devid = SA1111_DEVID_SAC,
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.irq = {
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AUDXMTDMADONEA,
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AUDXMTDMADONEB,
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AUDRCVDMADONEA,
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AUDRCVDMADONEB
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},
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},
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{
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.offset = 0x0800,
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.skpcr_mask = SKPCR_SCLKEN,
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.devid = SA1111_DEVID_SSP,
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},
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{
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.offset = SA1111_KBD,
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.skpcr_mask = SKPCR_PTCLKEN,
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.devid = SA1111_DEVID_PS2,
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.irq = {
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IRQ_TPRXINT,
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IRQ_TPTXINT
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},
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},
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{
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.offset = SA1111_MSE,
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.skpcr_mask = SKPCR_PMCLKEN,
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.devid = SA1111_DEVID_PS2,
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.irq = {
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IRQ_MSRXINT,
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IRQ_MSTXINT
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},
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},
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{
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.offset = 0x1800,
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.skpcr_mask = 0,
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.devid = SA1111_DEVID_PCMCIA,
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.irq = {
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IRQ_S0_READY_NINT,
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IRQ_S0_CD_VALID,
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IRQ_S0_BVD1_STSCHG,
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IRQ_S1_READY_NINT,
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IRQ_S1_CD_VALID,
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IRQ_S1_BVD1_STSCHG,
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},
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},
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};
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void __init sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes)
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{
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unsigned int sz = SZ_1M >> PAGE_SHIFT;
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if (node != 0)
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sz = 0;
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size[1] = size[0] - sz;
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size[0] = sz;
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}
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/*
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* SA1111 interrupt support. Since clearing an IRQ while there are
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* active IRQs causes the interrupt output to pulse, the upper levels
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* will call us again if there are more interrupts to process.
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*/
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static void
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sa1111_irq_handler(unsigned int irq, struct irq_desc *desc)
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{
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unsigned int stat0, stat1, i;
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void __iomem *base = get_irq_data(irq);
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stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
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stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
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sa1111_writel(stat0, base + SA1111_INTSTATCLR0);
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desc->chip->ack(irq);
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sa1111_writel(stat1, base + SA1111_INTSTATCLR1);
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if (stat0 == 0 && stat1 == 0) {
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do_bad_IRQ(irq, desc);
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return;
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}
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for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
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if (stat0 & 1)
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handle_edge_irq(i, irq_desc + i);
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for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
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if (stat1 & 1)
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handle_edge_irq(i, irq_desc + i);
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/* For level-based interrupts */
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desc->chip->unmask(irq);
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}
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#define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
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#define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
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static void sa1111_ack_irq(unsigned int irq)
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{
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}
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static void sa1111_mask_lowirq(unsigned int irq)
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{
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ie0;
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ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
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ie0 &= ~SA1111_IRQMASK_LO(irq);
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writel(ie0, mapbase + SA1111_INTEN0);
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}
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static void sa1111_unmask_lowirq(unsigned int irq)
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{
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ie0;
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ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
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ie0 |= SA1111_IRQMASK_LO(irq);
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sa1111_writel(ie0, mapbase + SA1111_INTEN0);
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}
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/*
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* Attempt to re-trigger the interrupt. The SA1111 contains a register
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* (INTSET) which claims to do this. However, in practice no amount of
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* manipulation of INTEN and INTSET guarantees that the interrupt will
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* be triggered. In fact, its very difficult, if not impossible to get
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* INTSET to re-trigger the interrupt.
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*/
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static int sa1111_retrigger_lowirq(unsigned int irq)
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{
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unsigned int mask = SA1111_IRQMASK_LO(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ip0;
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int i;
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ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
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for (i = 0; i < 8; i++) {
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sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
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sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
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if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
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break;
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}
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if (i == 8)
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printk(KERN_ERR "Danger Will Robinson: failed to "
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"re-trigger IRQ%d\n", irq);
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return i == 8 ? -1 : 0;
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}
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static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
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{
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unsigned int mask = SA1111_IRQMASK_LO(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ip0;
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if (flags == IRQ_TYPE_PROBE)
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return 0;
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if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
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return -EINVAL;
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ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
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if (flags & IRQ_TYPE_EDGE_RISING)
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ip0 &= ~mask;
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else
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ip0 |= mask;
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sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
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sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
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return 0;
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}
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static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
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{
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unsigned int mask = SA1111_IRQMASK_LO(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long we0;
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we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
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if (on)
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we0 |= mask;
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else
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we0 &= ~mask;
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sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
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return 0;
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}
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static struct irq_chip sa1111_low_chip = {
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.name = "SA1111-l",
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.ack = sa1111_ack_irq,
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.mask = sa1111_mask_lowirq,
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.unmask = sa1111_unmask_lowirq,
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.retrigger = sa1111_retrigger_lowirq,
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.set_type = sa1111_type_lowirq,
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.set_wake = sa1111_wake_lowirq,
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};
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static void sa1111_mask_highirq(unsigned int irq)
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{
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ie1;
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ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
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ie1 &= ~SA1111_IRQMASK_HI(irq);
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sa1111_writel(ie1, mapbase + SA1111_INTEN1);
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}
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static void sa1111_unmask_highirq(unsigned int irq)
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{
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ie1;
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ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
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ie1 |= SA1111_IRQMASK_HI(irq);
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sa1111_writel(ie1, mapbase + SA1111_INTEN1);
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}
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/*
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* Attempt to re-trigger the interrupt. The SA1111 contains a register
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* (INTSET) which claims to do this. However, in practice no amount of
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* manipulation of INTEN and INTSET guarantees that the interrupt will
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* be triggered. In fact, its very difficult, if not impossible to get
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* INTSET to re-trigger the interrupt.
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*/
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static int sa1111_retrigger_highirq(unsigned int irq)
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{
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unsigned int mask = SA1111_IRQMASK_HI(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ip1;
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int i;
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ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
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for (i = 0; i < 8; i++) {
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sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
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sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
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if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
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break;
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}
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if (i == 8)
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printk(KERN_ERR "Danger Will Robinson: failed to "
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"re-trigger IRQ%d\n", irq);
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return i == 8 ? -1 : 0;
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}
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static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
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{
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unsigned int mask = SA1111_IRQMASK_HI(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long ip1;
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if (flags == IRQ_TYPE_PROBE)
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return 0;
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if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
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return -EINVAL;
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ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
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if (flags & IRQ_TYPE_EDGE_RISING)
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ip1 &= ~mask;
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else
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ip1 |= mask;
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sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
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sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
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return 0;
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}
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static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
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{
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unsigned int mask = SA1111_IRQMASK_HI(irq);
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void __iomem *mapbase = get_irq_chip_data(irq);
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unsigned long we1;
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we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
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if (on)
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we1 |= mask;
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else
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we1 &= ~mask;
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sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
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return 0;
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}
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static struct irq_chip sa1111_high_chip = {
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.name = "SA1111-h",
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.ack = sa1111_ack_irq,
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.mask = sa1111_mask_highirq,
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.unmask = sa1111_unmask_highirq,
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.retrigger = sa1111_retrigger_highirq,
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.set_type = sa1111_type_highirq,
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.set_wake = sa1111_wake_highirq,
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};
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static void sa1111_setup_irq(struct sa1111 *sachip)
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{
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void __iomem *irqbase = sachip->base + SA1111_INTC;
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unsigned int irq;
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/*
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* We're guaranteed that this region hasn't been taken.
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*/
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request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
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/* disable all IRQs */
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sa1111_writel(0, irqbase + SA1111_INTEN0);
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sa1111_writel(0, irqbase + SA1111_INTEN1);
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sa1111_writel(0, irqbase + SA1111_WAKEEN0);
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sa1111_writel(0, irqbase + SA1111_WAKEEN1);
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/*
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* detect on rising edge. Note: Feb 2001 Errata for SA1111
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* specifies that S0ReadyInt and S1ReadyInt should be '1'.
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*/
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sa1111_writel(0, irqbase + SA1111_INTPOL0);
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sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
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SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
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irqbase + SA1111_INTPOL1);
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/* clear all IRQs */
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sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
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sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
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for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
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set_irq_chip(irq, &sa1111_low_chip);
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set_irq_chip_data(irq, irqbase);
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set_irq_handler(irq, handle_edge_irq);
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set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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}
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for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
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set_irq_chip(irq, &sa1111_high_chip);
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set_irq_chip_data(irq, irqbase);
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set_irq_handler(irq, handle_edge_irq);
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set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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}
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/*
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* Register SA1111 interrupt
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*/
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set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
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set_irq_data(sachip->irq, irqbase);
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set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
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}
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/*
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* Bring the SA1111 out of reset. This requires a set procedure:
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* 1. nRESET asserted (by hardware)
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* 2. CLK turned on from SA1110
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* 3. nRESET deasserted
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* 4. VCO turned on, PLL_BYPASS turned off
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* 5. Wait lock time, then assert RCLKEn
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* 7. PCR set to allow clocking of individual functions
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*
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* Until we've done this, the only registers we can access are:
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* SBI_SKCR
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* SBI_SMCR
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* SBI_SKID
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*/
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static void sa1111_wake(struct sa1111 *sachip)
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{
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unsigned long flags, r;
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spin_lock_irqsave(&sachip->lock, flags);
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clk_enable(sachip->clk);
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/*
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* Turn VCO on, and disable PLL Bypass.
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*/
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r = sa1111_readl(sachip->base + SA1111_SKCR);
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r &= ~SKCR_VCO_OFF;
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sa1111_writel(r, sachip->base + SA1111_SKCR);
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r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
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sa1111_writel(r, sachip->base + SA1111_SKCR);
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/*
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* Wait lock time. SA1111 manual _doesn't_
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* specify a figure for this! We choose 100us.
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*/
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udelay(100);
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/*
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* Enable RCLK. We also ensure that RDYEN is set.
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*/
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r |= SKCR_RCLKEN | SKCR_RDYEN;
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sa1111_writel(r, sachip->base + SA1111_SKCR);
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/*
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* Wait 14 RCLK cycles for the chip to finish coming out
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* of reset. (RCLK=24MHz). This is 590ns.
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*/
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udelay(1);
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/*
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* Ensure all clocks are initially off.
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*/
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sa1111_writel(0, sachip->base + SA1111_SKPCR);
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spin_unlock_irqrestore(&sachip->lock, flags);
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}
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#ifdef CONFIG_ARCH_SA1100
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static u32 sa1111_dma_mask[] = {
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~0,
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~(1 << 20),
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~(1 << 23),
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~(1 << 24),
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~(1 << 25),
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~(1 << 20),
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~(1 << 20),
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0,
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};
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/*
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* Configure the SA1111 shared memory controller.
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*/
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void
|
|
sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
|
|
unsigned int cas_latency)
|
|
{
|
|
unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
|
|
|
|
if (cas_latency == 3)
|
|
smcr |= SMCR_CLAT;
|
|
|
|
sa1111_writel(smcr, sachip->base + SA1111_SMCR);
|
|
|
|
/*
|
|
* Now clear the bits in the DMA mask to work around the SA1111
|
|
* DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
|
|
* Chip Specification Update, June 2000, Erratum #7).
|
|
*/
|
|
if (sachip->dev->dma_mask)
|
|
*sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
|
|
|
|
sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
|
|
}
|
|
|
|
#endif
|
|
|
|
static void sa1111_dev_release(struct device *_dev)
|
|
{
|
|
struct sa1111_dev *dev = SA1111_DEV(_dev);
|
|
|
|
release_resource(&dev->res);
|
|
kfree(dev);
|
|
}
|
|
|
|
static int
|
|
sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
|
|
struct sa1111_dev_info *info)
|
|
{
|
|
struct sa1111_dev *dev;
|
|
int ret;
|
|
|
|
dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
|
|
if (!dev) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
dev_set_name(&dev->dev, "%4.4lx", info->offset);
|
|
dev->devid = info->devid;
|
|
dev->dev.parent = sachip->dev;
|
|
dev->dev.bus = &sa1111_bus_type;
|
|
dev->dev.release = sa1111_dev_release;
|
|
dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
|
|
dev->res.start = sachip->phys + info->offset;
|
|
dev->res.end = dev->res.start + 511;
|
|
dev->res.name = dev_name(&dev->dev);
|
|
dev->res.flags = IORESOURCE_MEM;
|
|
dev->mapbase = sachip->base + info->offset;
|
|
dev->skpcr_mask = info->skpcr_mask;
|
|
memmove(dev->irq, info->irq, sizeof(dev->irq));
|
|
|
|
ret = request_resource(parent, &dev->res);
|
|
if (ret) {
|
|
printk("SA1111: failed to allocate resource for %s\n",
|
|
dev->res.name);
|
|
dev_set_name(&dev->dev, NULL);
|
|
kfree(dev);
|
|
goto out;
|
|
}
|
|
|
|
|
|
ret = device_register(&dev->dev);
|
|
if (ret) {
|
|
release_resource(&dev->res);
|
|
kfree(dev);
|
|
goto out;
|
|
}
|
|
|
|
#ifdef CONFIG_DMABOUNCE
|
|
/*
|
|
* If the parent device has a DMA mask associated with it,
|
|
* propagate it down to the children.
|
|
*/
|
|
if (sachip->dev->dma_mask) {
|
|
dev->dma_mask = *sachip->dev->dma_mask;
|
|
dev->dev.dma_mask = &dev->dma_mask;
|
|
|
|
if (dev->dma_mask != 0xffffffffUL) {
|
|
ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
|
|
if (ret) {
|
|
dev_err(&dev->dev, "SA1111: Failed to register"
|
|
" with dmabounce\n");
|
|
device_unregister(&dev->dev);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* sa1111_probe - probe for a single SA1111 chip.
|
|
* @phys_addr: physical address of device.
|
|
*
|
|
* Probe for a SA1111 chip. This must be called
|
|
* before any other SA1111-specific code.
|
|
*
|
|
* Returns:
|
|
* %-ENODEV device not found.
|
|
* %-EBUSY physical address already marked in-use.
|
|
* %0 successful.
|
|
*/
|
|
static int
|
|
__sa1111_probe(struct device *me, struct resource *mem, int irq)
|
|
{
|
|
struct sa1111 *sachip;
|
|
unsigned long id;
|
|
unsigned int has_devs;
|
|
int i, ret = -ENODEV;
|
|
|
|
sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
|
|
if (!sachip)
|
|
return -ENOMEM;
|
|
|
|
sachip->clk = clk_get(me, "SA1111_CLK");
|
|
if (IS_ERR(sachip->clk)) {
|
|
ret = PTR_ERR(sachip->clk);
|
|
goto err_free;
|
|
}
|
|
|
|
spin_lock_init(&sachip->lock);
|
|
|
|
sachip->dev = me;
|
|
dev_set_drvdata(sachip->dev, sachip);
|
|
|
|
sachip->phys = mem->start;
|
|
sachip->irq = irq;
|
|
|
|
/*
|
|
* Map the whole region. This also maps the
|
|
* registers for our children.
|
|
*/
|
|
sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
|
|
if (!sachip->base) {
|
|
ret = -ENOMEM;
|
|
goto err_clkput;
|
|
}
|
|
|
|
/*
|
|
* Probe for the chip. Only touch the SBI registers.
|
|
*/
|
|
id = sa1111_readl(sachip->base + SA1111_SKID);
|
|
if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
|
|
printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
|
|
ret = -ENODEV;
|
|
goto err_unmap;
|
|
}
|
|
|
|
printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
|
|
"silicon revision %lx, metal revision %lx\n",
|
|
(id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
|
|
|
|
/*
|
|
* We found it. Wake the chip up, and initialise.
|
|
*/
|
|
sa1111_wake(sachip);
|
|
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
{
|
|
unsigned int val;
|
|
|
|
/*
|
|
* The SDRAM configuration of the SA1110 and the SA1111 must
|
|
* match. This is very important to ensure that SA1111 accesses
|
|
* don't corrupt the SDRAM. Note that this ungates the SA1111's
|
|
* MBGNT signal, so we must have called sa1110_mb_disable()
|
|
* beforehand.
|
|
*/
|
|
sa1111_configure_smc(sachip, 1,
|
|
FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
|
|
FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
|
|
|
|
/*
|
|
* We only need to turn on DCLK whenever we want to use the
|
|
* DMA. It can otherwise be held firmly in the off position.
|
|
* (currently, we always enable it.)
|
|
*/
|
|
val = sa1111_readl(sachip->base + SA1111_SKPCR);
|
|
sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
|
|
|
|
/*
|
|
* Enable the SA1110 memory bus request and grant signals.
|
|
*/
|
|
sa1110_mb_enable();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* The interrupt controller must be initialised before any
|
|
* other device to ensure that the interrupts are available.
|
|
*/
|
|
if (sachip->irq != NO_IRQ)
|
|
sa1111_setup_irq(sachip);
|
|
|
|
g_sa1111 = sachip;
|
|
|
|
has_devs = ~0;
|
|
if (machine_is_assabet() || machine_is_jornada720() ||
|
|
machine_is_badge4())
|
|
has_devs &= ~(1 << 4);
|
|
else
|
|
has_devs &= ~(1 << 1);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
|
|
if (has_devs & (1 << i))
|
|
sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
|
|
|
|
return 0;
|
|
|
|
err_unmap:
|
|
iounmap(sachip->base);
|
|
err_clkput:
|
|
clk_put(sachip->clk);
|
|
err_free:
|
|
kfree(sachip);
|
|
return ret;
|
|
}
|
|
|
|
static int sa1111_remove_one(struct device *dev, void *data)
|
|
{
|
|
device_unregister(dev);
|
|
return 0;
|
|
}
|
|
|
|
static void __sa1111_remove(struct sa1111 *sachip)
|
|
{
|
|
void __iomem *irqbase = sachip->base + SA1111_INTC;
|
|
|
|
device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
|
|
|
|
/* disable all IRQs */
|
|
sa1111_writel(0, irqbase + SA1111_INTEN0);
|
|
sa1111_writel(0, irqbase + SA1111_INTEN1);
|
|
sa1111_writel(0, irqbase + SA1111_WAKEEN0);
|
|
sa1111_writel(0, irqbase + SA1111_WAKEEN1);
|
|
|
|
clk_disable(sachip->clk);
|
|
|
|
if (sachip->irq != NO_IRQ) {
|
|
set_irq_chained_handler(sachip->irq, NULL);
|
|
set_irq_data(sachip->irq, NULL);
|
|
|
|
release_mem_region(sachip->phys + SA1111_INTC, 512);
|
|
}
|
|
|
|
iounmap(sachip->base);
|
|
clk_put(sachip->clk);
|
|
kfree(sachip);
|
|
}
|
|
|
|
/*
|
|
* According to the "Intel StrongARM SA-1111 Microprocessor Companion
|
|
* Chip Specification Update" (June 2000), erratum #7, there is a
|
|
* significant bug in the SA1111 SDRAM shared memory controller. If
|
|
* an access to a region of memory above 1MB relative to the bank base,
|
|
* it is important that address bit 10 _NOT_ be asserted. Depending
|
|
* on the configuration of the RAM, bit 10 may correspond to one
|
|
* of several different (processor-relative) address bits.
|
|
*
|
|
* This routine only identifies whether or not a given DMA address
|
|
* is susceptible to the bug.
|
|
*
|
|
* This should only get called for sa1111_device types due to the
|
|
* way we configure our device dma_masks.
|
|
*/
|
|
int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
|
|
{
|
|
/*
|
|
* Section 4.6 of the "Intel StrongARM SA-1111 Development Module
|
|
* User's Guide" mentions that jumpers R51 and R52 control the
|
|
* target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
|
|
* SDRAM bank 1 on Neponset). The default configuration selects
|
|
* Assabet, so any address in bank 1 is necessarily invalid.
|
|
*/
|
|
return ((machine_is_assabet() || machine_is_pfs168()) &&
|
|
(addr >= 0xc8000000 || (addr + size) >= 0xc8000000));
|
|
}
|
|
|
|
struct sa1111_save_data {
|
|
unsigned int skcr;
|
|
unsigned int skpcr;
|
|
unsigned int skcdr;
|
|
unsigned char skaud;
|
|
unsigned char skpwm0;
|
|
unsigned char skpwm1;
|
|
|
|
/*
|
|
* Interrupt controller
|
|
*/
|
|
unsigned int intpol0;
|
|
unsigned int intpol1;
|
|
unsigned int inten0;
|
|
unsigned int inten1;
|
|
unsigned int wakepol0;
|
|
unsigned int wakepol1;
|
|
unsigned int wakeen0;
|
|
unsigned int wakeen1;
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
struct sa1111 *sachip = platform_get_drvdata(dev);
|
|
struct sa1111_save_data *save;
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
void __iomem *base;
|
|
|
|
save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
|
|
if (!save)
|
|
return -ENOMEM;
|
|
sachip->saved_state = save;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
|
|
/*
|
|
* Save state.
|
|
*/
|
|
base = sachip->base;
|
|
save->skcr = sa1111_readl(base + SA1111_SKCR);
|
|
save->skpcr = sa1111_readl(base + SA1111_SKPCR);
|
|
save->skcdr = sa1111_readl(base + SA1111_SKCDR);
|
|
save->skaud = sa1111_readl(base + SA1111_SKAUD);
|
|
save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
|
|
save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
|
|
|
|
base = sachip->base + SA1111_INTC;
|
|
save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
|
|
save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
|
|
save->inten0 = sa1111_readl(base + SA1111_INTEN0);
|
|
save->inten1 = sa1111_readl(base + SA1111_INTEN1);
|
|
save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
|
|
save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
|
|
save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
|
|
save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
|
|
|
|
/*
|
|
* Disable.
|
|
*/
|
|
val = sa1111_readl(sachip->base + SA1111_SKCR);
|
|
sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
|
|
sa1111_writel(0, sachip->base + SA1111_SKPWM0);
|
|
sa1111_writel(0, sachip->base + SA1111_SKPWM1);
|
|
|
|
clk_disable(sachip->clk);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sa1111_resume - Restore the SA1111 device state.
|
|
* @dev: device to restore
|
|
*
|
|
* Restore the general state of the SA1111; clock control and
|
|
* interrupt controller. Other parts of the SA1111 must be
|
|
* restored by their respective drivers, and must be called
|
|
* via LDM after this function.
|
|
*/
|
|
static int sa1111_resume(struct platform_device *dev)
|
|
{
|
|
struct sa1111 *sachip = platform_get_drvdata(dev);
|
|
struct sa1111_save_data *save;
|
|
unsigned long flags, id;
|
|
void __iomem *base;
|
|
|
|
save = sachip->saved_state;
|
|
if (!save)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
|
|
/*
|
|
* Ensure that the SA1111 is still here.
|
|
* FIXME: shouldn't do this here.
|
|
*/
|
|
id = sa1111_readl(sachip->base + SA1111_SKID);
|
|
if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
|
|
__sa1111_remove(sachip);
|
|
platform_set_drvdata(dev, NULL);
|
|
kfree(save);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* First of all, wake up the chip.
|
|
*/
|
|
sa1111_wake(sachip);
|
|
sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
|
|
sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
|
|
|
|
base = sachip->base;
|
|
sa1111_writel(save->skcr, base + SA1111_SKCR);
|
|
sa1111_writel(save->skpcr, base + SA1111_SKPCR);
|
|
sa1111_writel(save->skcdr, base + SA1111_SKCDR);
|
|
sa1111_writel(save->skaud, base + SA1111_SKAUD);
|
|
sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
|
|
sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
|
|
|
|
base = sachip->base + SA1111_INTC;
|
|
sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
|
|
sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
|
|
sa1111_writel(save->inten0, base + SA1111_INTEN0);
|
|
sa1111_writel(save->inten1, base + SA1111_INTEN1);
|
|
sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
|
|
sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
|
|
sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
|
|
sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
sachip->saved_state = NULL;
|
|
kfree(save);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define sa1111_suspend NULL
|
|
#define sa1111_resume NULL
|
|
#endif
|
|
|
|
static int __devinit sa1111_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *mem;
|
|
int irq;
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem)
|
|
return -EINVAL;
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return -ENXIO;
|
|
|
|
return __sa1111_probe(&pdev->dev, mem, irq);
|
|
}
|
|
|
|
static int sa1111_remove(struct platform_device *pdev)
|
|
{
|
|
struct sa1111 *sachip = platform_get_drvdata(pdev);
|
|
|
|
if (sachip) {
|
|
__sa1111_remove(sachip);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
#ifdef CONFIG_PM
|
|
kfree(sachip->saved_state);
|
|
sachip->saved_state = NULL;
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Not sure if this should be on the system bus or not yet.
|
|
* We really want some way to register a system device at
|
|
* the per-machine level, and then have this driver pick
|
|
* up the registered devices.
|
|
*
|
|
* We also need to handle the SDRAM configuration for
|
|
* PXA250/SA1110 machine classes.
|
|
*/
|
|
static struct platform_driver sa1111_device_driver = {
|
|
.probe = sa1111_probe,
|
|
.remove = sa1111_remove,
|
|
.suspend = sa1111_suspend,
|
|
.resume = sa1111_resume,
|
|
.driver = {
|
|
.name = "sa1111",
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Get the parent device driver (us) structure
|
|
* from a child function device
|
|
*/
|
|
static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
|
|
{
|
|
return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
|
|
}
|
|
|
|
/*
|
|
* The bits in the opdiv field are non-linear.
|
|
*/
|
|
static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
|
|
|
|
static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
|
|
{
|
|
unsigned int skcdr, fbdiv, ipdiv, opdiv;
|
|
|
|
skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
|
|
|
|
fbdiv = (skcdr & 0x007f) + 2;
|
|
ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
|
|
opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
|
|
|
|
return 3686400 * fbdiv / (ipdiv * opdiv);
|
|
}
|
|
|
|
/**
|
|
* sa1111_pll_clock - return the current PLL clock frequency.
|
|
* @sadev: SA1111 function block
|
|
*
|
|
* BUG: we should look at SKCR. We also blindly believe that
|
|
* the chip is being fed with the 3.6864MHz clock.
|
|
*
|
|
* Returns the PLL clock in Hz.
|
|
*/
|
|
unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
|
|
return __sa1111_pll_clock(sachip);
|
|
}
|
|
|
|
/**
|
|
* sa1111_select_audio_mode - select I2S or AC link mode
|
|
* @sadev: SA1111 function block
|
|
* @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
|
|
*
|
|
* Frob the SKCR to select AC Link mode or I2S mode for
|
|
* the audio block.
|
|
*/
|
|
void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
|
|
val = sa1111_readl(sachip->base + SA1111_SKCR);
|
|
if (mode == SA1111_AUDIO_I2S) {
|
|
val &= ~SKCR_SELAC;
|
|
} else {
|
|
val |= SKCR_SELAC;
|
|
}
|
|
sa1111_writel(val, sachip->base + SA1111_SKCR);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* sa1111_set_audio_rate - set the audio sample rate
|
|
* @sadev: SA1111 SAC function block
|
|
* @rate: sample rate to select
|
|
*/
|
|
int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned int div;
|
|
|
|
if (sadev->devid != SA1111_DEVID_SAC)
|
|
return -EINVAL;
|
|
|
|
div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
|
|
if (div == 0)
|
|
div = 1;
|
|
if (div > 128)
|
|
div = 128;
|
|
|
|
sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sa1111_get_audio_rate - get the audio sample rate
|
|
* @sadev: SA1111 SAC function block device
|
|
*/
|
|
int sa1111_get_audio_rate(struct sa1111_dev *sadev)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long div;
|
|
|
|
if (sadev->devid != SA1111_DEVID_SAC)
|
|
return -EINVAL;
|
|
|
|
div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
|
|
|
|
return __sa1111_pll_clock(sachip) / (256 * div);
|
|
}
|
|
|
|
void sa1111_set_io_dir(struct sa1111_dev *sadev,
|
|
unsigned int bits, unsigned int dir,
|
|
unsigned int sleep_dir)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
void __iomem *gpio = sachip->base + SA1111_GPIO;
|
|
|
|
#define MODIFY_BITS(port, mask, dir) \
|
|
if (mask) { \
|
|
val = sa1111_readl(port); \
|
|
val &= ~(mask); \
|
|
val |= (dir) & (mask); \
|
|
sa1111_writel(val, port); \
|
|
}
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
|
|
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
void __iomem *gpio = sachip->base + SA1111_GPIO;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
void __iomem *gpio = sachip->base + SA1111_GPIO;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
|
|
MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Individual device operations.
|
|
*/
|
|
|
|
/**
|
|
* sa1111_enable_device - enable an on-chip SA1111 function block
|
|
* @sadev: SA1111 function block device to enable
|
|
*/
|
|
void sa1111_enable_device(struct sa1111_dev *sadev)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
val = sa1111_readl(sachip->base + SA1111_SKPCR);
|
|
sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* sa1111_disable_device - disable an on-chip SA1111 function block
|
|
* @sadev: SA1111 function block device to disable
|
|
*/
|
|
void sa1111_disable_device(struct sa1111_dev *sadev)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
val = sa1111_readl(sachip->base + SA1111_SKPCR);
|
|
sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
/*
|
|
* SA1111 "Register Access Bus."
|
|
*
|
|
* We model this as a regular bus type, and hang devices directly
|
|
* off this.
|
|
*/
|
|
static int sa1111_match(struct device *_dev, struct device_driver *_drv)
|
|
{
|
|
struct sa1111_dev *dev = SA1111_DEV(_dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(_drv);
|
|
|
|
return dev->devid == drv->devid;
|
|
}
|
|
|
|
static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
|
|
{
|
|
struct sa1111_dev *sadev = SA1111_DEV(dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(dev->driver);
|
|
int ret = 0;
|
|
|
|
if (drv && drv->suspend)
|
|
ret = drv->suspend(sadev, state);
|
|
return ret;
|
|
}
|
|
|
|
static int sa1111_bus_resume(struct device *dev)
|
|
{
|
|
struct sa1111_dev *sadev = SA1111_DEV(dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(dev->driver);
|
|
int ret = 0;
|
|
|
|
if (drv && drv->resume)
|
|
ret = drv->resume(sadev);
|
|
return ret;
|
|
}
|
|
|
|
static int sa1111_bus_probe(struct device *dev)
|
|
{
|
|
struct sa1111_dev *sadev = SA1111_DEV(dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(dev->driver);
|
|
int ret = -ENODEV;
|
|
|
|
if (drv->probe)
|
|
ret = drv->probe(sadev);
|
|
return ret;
|
|
}
|
|
|
|
static int sa1111_bus_remove(struct device *dev)
|
|
{
|
|
struct sa1111_dev *sadev = SA1111_DEV(dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(dev->driver);
|
|
int ret = 0;
|
|
|
|
if (drv->remove)
|
|
ret = drv->remove(sadev);
|
|
return ret;
|
|
}
|
|
|
|
struct bus_type sa1111_bus_type = {
|
|
.name = "sa1111-rab",
|
|
.match = sa1111_match,
|
|
.probe = sa1111_bus_probe,
|
|
.remove = sa1111_bus_remove,
|
|
.suspend = sa1111_bus_suspend,
|
|
.resume = sa1111_bus_resume,
|
|
};
|
|
|
|
int sa1111_driver_register(struct sa1111_driver *driver)
|
|
{
|
|
driver->drv.bus = &sa1111_bus_type;
|
|
return driver_register(&driver->drv);
|
|
}
|
|
|
|
void sa1111_driver_unregister(struct sa1111_driver *driver)
|
|
{
|
|
driver_unregister(&driver->drv);
|
|
}
|
|
|
|
static int __init sa1111_init(void)
|
|
{
|
|
int ret = bus_register(&sa1111_bus_type);
|
|
if (ret == 0)
|
|
platform_driver_register(&sa1111_device_driver);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit sa1111_exit(void)
|
|
{
|
|
platform_driver_unregister(&sa1111_device_driver);
|
|
bus_unregister(&sa1111_bus_type);
|
|
}
|
|
|
|
subsys_initcall(sa1111_init);
|
|
module_exit(sa1111_exit);
|
|
|
|
MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(sa1111_select_audio_mode);
|
|
EXPORT_SYMBOL(sa1111_set_audio_rate);
|
|
EXPORT_SYMBOL(sa1111_get_audio_rate);
|
|
EXPORT_SYMBOL(sa1111_set_io_dir);
|
|
EXPORT_SYMBOL(sa1111_set_io);
|
|
EXPORT_SYMBOL(sa1111_set_sleep_io);
|
|
EXPORT_SYMBOL(sa1111_enable_device);
|
|
EXPORT_SYMBOL(sa1111_disable_device);
|
|
EXPORT_SYMBOL(sa1111_pll_clock);
|
|
EXPORT_SYMBOL(sa1111_bus_type);
|
|
EXPORT_SYMBOL(sa1111_driver_register);
|
|
EXPORT_SYMBOL(sa1111_driver_unregister);
|