1482 lines
37 KiB
C
1482 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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 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/gpio/driver.h>
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#include <linux/init.h>
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#include <linux/irq.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-map-ops.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/irq.h>
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#include <asm/mach-types.h>
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#include <linux/sizes.h>
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#include <asm/hardware/sa1111.h>
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/* SA1111 IRQs */
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#define IRQ_GPAIN0 (0)
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#define IRQ_GPAIN1 (1)
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#define IRQ_GPAIN2 (2)
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#define IRQ_GPAIN3 (3)
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#define IRQ_GPBIN0 (4)
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#define IRQ_GPBIN1 (5)
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#define IRQ_GPBIN2 (6)
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#define IRQ_GPBIN3 (7)
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#define IRQ_GPBIN4 (8)
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#define IRQ_GPBIN5 (9)
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#define IRQ_GPCIN0 (10)
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#define IRQ_GPCIN1 (11)
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#define IRQ_GPCIN2 (12)
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#define IRQ_GPCIN3 (13)
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#define IRQ_GPCIN4 (14)
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#define IRQ_GPCIN5 (15)
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#define IRQ_GPCIN6 (16)
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#define IRQ_GPCIN7 (17)
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#define IRQ_MSTXINT (18)
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#define IRQ_MSRXINT (19)
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#define IRQ_MSSTOPERRINT (20)
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#define IRQ_TPTXINT (21)
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#define IRQ_TPRXINT (22)
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#define IRQ_TPSTOPERRINT (23)
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#define SSPXMTINT (24)
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#define SSPRCVINT (25)
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#define SSPROR (26)
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#define AUDXMTDMADONEA (32)
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#define AUDRCVDMADONEA (33)
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#define AUDXMTDMADONEB (34)
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#define AUDRCVDMADONEB (35)
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#define AUDTFSR (36)
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#define AUDRFSR (37)
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#define AUDTUR (38)
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#define AUDROR (39)
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#define AUDDTS (40)
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#define AUDRDD (41)
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#define AUDSTO (42)
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#define IRQ_USBPWR (43)
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#define IRQ_HCIM (44)
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#define IRQ_HCIBUFFACC (45)
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#define IRQ_HCIRMTWKP (46)
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#define IRQ_NHCIMFCIR (47)
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#define IRQ_USB_PORT_RESUME (48)
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#define IRQ_S0_READY_NINT (49)
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#define IRQ_S1_READY_NINT (50)
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#define IRQ_S0_CD_VALID (51)
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#define IRQ_S1_CD_VALID (52)
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#define IRQ_S0_BVD1_STSCHG (53)
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#define IRQ_S1_BVD1_STSCHG (54)
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#define SA1111_IRQ_NR (55)
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extern void sa1110_mb_enable(void);
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extern void sa1110_mb_disable(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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int irq_base; /* base for cascaded on-chip IRQs */
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spinlock_t lock;
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void __iomem *base;
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struct sa1111_platform_data *pdata;
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struct irq_domain *irqdomain;
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struct gpio_chip gc;
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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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bool dma;
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unsigned int devid;
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unsigned int hwirq[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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.dma = true,
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.devid = SA1111_DEVID_USB,
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.hwirq = {
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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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.dma = true,
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.devid = SA1111_DEVID_SAC,
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.hwirq = {
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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_KBD,
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.hwirq = {
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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_MSE,
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.hwirq = {
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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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.hwirq = {
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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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static int sa1111_map_irq(struct sa1111 *sachip, irq_hw_number_t hwirq)
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{
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return irq_create_mapping(sachip->irqdomain, hwirq);
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}
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static void sa1111_handle_irqdomain(struct irq_domain *irqdomain, int irq)
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{
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struct irq_desc *d = irq_to_desc(irq_linear_revmap(irqdomain, irq));
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if (d)
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generic_handle_irq_desc(d);
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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 sa1111_irq_handler(struct irq_desc *desc)
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{
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unsigned int stat0, stat1, i;
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struct sa1111 *sachip = irq_desc_get_handler_data(desc);
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struct irq_domain *irqdomain;
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void __iomem *mapbase = sachip->base + SA1111_INTC;
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stat0 = readl_relaxed(mapbase + SA1111_INTSTATCLR0);
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stat1 = readl_relaxed(mapbase + SA1111_INTSTATCLR1);
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writel_relaxed(stat0, mapbase + SA1111_INTSTATCLR0);
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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writel_relaxed(stat1, mapbase + SA1111_INTSTATCLR1);
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if (stat0 == 0 && stat1 == 0) {
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do_bad_IRQ(desc);
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return;
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}
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irqdomain = sachip->irqdomain;
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for (i = 0; stat0; i++, stat0 >>= 1)
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if (stat0 & 1)
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sa1111_handle_irqdomain(irqdomain, i);
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for (i = 32; stat1; i++, stat1 >>= 1)
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if (stat1 & 1)
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sa1111_handle_irqdomain(irqdomain, i);
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/* For level-based interrupts */
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desc->irq_data.chip->irq_unmask(&desc->irq_data);
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}
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static u32 sa1111_irqmask(struct irq_data *d)
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{
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return BIT(irqd_to_hwirq(d) & 31);
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}
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static int sa1111_irqbank(struct irq_data *d)
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{
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return (irqd_to_hwirq(d) / 32) * 4;
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}
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static void sa1111_ack_irq(struct irq_data *d)
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{
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}
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static void sa1111_mask_irq(struct irq_data *d)
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{
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struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
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void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
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u32 ie;
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ie = readl_relaxed(mapbase + SA1111_INTEN0);
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ie &= ~sa1111_irqmask(d);
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writel(ie, mapbase + SA1111_INTEN0);
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}
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static void sa1111_unmask_irq(struct irq_data *d)
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{
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struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
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void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
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u32 ie;
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ie = readl_relaxed(mapbase + SA1111_INTEN0);
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ie |= sa1111_irqmask(d);
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writel_relaxed(ie, 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_irq(struct irq_data *d)
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{
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struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
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void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
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u32 ip, mask = sa1111_irqmask(d);
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int i;
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ip = readl_relaxed(mapbase + SA1111_INTPOL0);
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for (i = 0; i < 8; i++) {
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writel_relaxed(ip ^ mask, mapbase + SA1111_INTPOL0);
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writel_relaxed(ip, mapbase + SA1111_INTPOL0);
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if (readl_relaxed(mapbase + SA1111_INTSTATCLR0) & mask)
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break;
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}
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if (i == 8) {
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pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n",
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d->irq);
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return 0;
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}
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return 1;
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}
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static int sa1111_type_irq(struct irq_data *d, unsigned int flags)
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{
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struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
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void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
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u32 ip, mask = sa1111_irqmask(d);
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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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ip = readl_relaxed(mapbase + SA1111_INTPOL0);
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if (flags & IRQ_TYPE_EDGE_RISING)
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ip &= ~mask;
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else
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ip |= mask;
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writel_relaxed(ip, mapbase + SA1111_INTPOL0);
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writel_relaxed(ip, mapbase + SA1111_WAKEPOL0);
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return 0;
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}
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static int sa1111_wake_irq(struct irq_data *d, unsigned int on)
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{
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struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
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void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
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u32 we, mask = sa1111_irqmask(d);
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we = readl_relaxed(mapbase + SA1111_WAKEEN0);
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if (on)
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we |= mask;
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else
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we &= ~mask;
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writel_relaxed(we, mapbase + SA1111_WAKEEN0);
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return 0;
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}
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static struct irq_chip sa1111_irq_chip = {
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.name = "SA1111",
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.irq_ack = sa1111_ack_irq,
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.irq_mask = sa1111_mask_irq,
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.irq_unmask = sa1111_unmask_irq,
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.irq_retrigger = sa1111_retrigger_irq,
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.irq_set_type = sa1111_type_irq,
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.irq_set_wake = sa1111_wake_irq,
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};
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static int sa1111_irqdomain_map(struct irq_domain *d, unsigned int irq,
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irq_hw_number_t hwirq)
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{
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struct sa1111 *sachip = d->host_data;
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/* Disallow unavailable interrupts */
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if (hwirq > SSPROR && hwirq < AUDXMTDMADONEA)
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return -EINVAL;
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irq_set_chip_data(irq, sachip);
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irq_set_chip_and_handler(irq, &sa1111_irq_chip, handle_edge_irq);
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irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
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return 0;
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}
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static const struct irq_domain_ops sa1111_irqdomain_ops = {
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.map = sa1111_irqdomain_map,
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.xlate = irq_domain_xlate_twocell,
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};
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static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base)
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{
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void __iomem *irqbase = sachip->base + SA1111_INTC;
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int ret;
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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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ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1);
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if (ret <= 0) {
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dev_err(sachip->dev, "unable to allocate %u irqs: %d\n",
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SA1111_IRQ_NR, ret);
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if (ret == 0)
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ret = -EINVAL;
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return ret;
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}
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sachip->irq_base = ret;
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/* disable all IRQs */
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writel_relaxed(0, irqbase + SA1111_INTEN0);
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writel_relaxed(0, irqbase + SA1111_INTEN1);
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writel_relaxed(0, irqbase + SA1111_WAKEEN0);
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writel_relaxed(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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writel_relaxed(0, irqbase + SA1111_INTPOL0);
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writel_relaxed(BIT(IRQ_S0_READY_NINT & 31) |
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BIT(IRQ_S1_READY_NINT & 31),
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irqbase + SA1111_INTPOL1);
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/* clear all IRQs */
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writel_relaxed(~0, irqbase + SA1111_INTSTATCLR0);
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writel_relaxed(~0, irqbase + SA1111_INTSTATCLR1);
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sachip->irqdomain = irq_domain_add_linear(NULL, SA1111_IRQ_NR,
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&sa1111_irqdomain_ops,
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sachip);
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if (!sachip->irqdomain) {
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irq_free_descs(sachip->irq_base, SA1111_IRQ_NR);
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return -ENOMEM;
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}
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irq_domain_associate_many(sachip->irqdomain,
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sachip->irq_base + IRQ_GPAIN0,
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IRQ_GPAIN0, SSPROR + 1 - IRQ_GPAIN0);
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irq_domain_associate_many(sachip->irqdomain,
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sachip->irq_base + AUDXMTDMADONEA,
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AUDXMTDMADONEA,
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IRQ_S1_BVD1_STSCHG + 1 - AUDXMTDMADONEA);
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/*
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* Register SA1111 interrupt
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*/
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irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
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irq_set_chained_handler_and_data(sachip->irq, sa1111_irq_handler,
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sachip);
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dev_info(sachip->dev, "Providing IRQ%u-%u\n",
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sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1);
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return 0;
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}
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static void sa1111_remove_irq(struct sa1111 *sachip)
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{
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struct irq_domain *domain = sachip->irqdomain;
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void __iomem *irqbase = sachip->base + SA1111_INTC;
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int i;
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/* disable all IRQs */
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writel_relaxed(0, irqbase + SA1111_INTEN0);
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writel_relaxed(0, irqbase + SA1111_INTEN1);
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writel_relaxed(0, irqbase + SA1111_WAKEEN0);
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writel_relaxed(0, irqbase + SA1111_WAKEEN1);
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irq_set_chained_handler_and_data(sachip->irq, NULL, NULL);
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for (i = 0; i < SA1111_IRQ_NR; i++)
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irq_dispose_mapping(irq_find_mapping(domain, i));
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irq_domain_remove(domain);
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release_mem_region(sachip->phys + SA1111_INTC, 512);
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}
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enum {
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SA1111_GPIO_PXDDR = (SA1111_GPIO_PADDR - SA1111_GPIO_PADDR),
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SA1111_GPIO_PXDRR = (SA1111_GPIO_PADRR - SA1111_GPIO_PADDR),
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SA1111_GPIO_PXDWR = (SA1111_GPIO_PADWR - SA1111_GPIO_PADDR),
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SA1111_GPIO_PXSDR = (SA1111_GPIO_PASDR - SA1111_GPIO_PADDR),
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SA1111_GPIO_PXSSR = (SA1111_GPIO_PASSR - SA1111_GPIO_PADDR),
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|
};
|
|
|
|
static struct sa1111 *gc_to_sa1111(struct gpio_chip *gc)
|
|
{
|
|
return container_of(gc, struct sa1111, gc);
|
|
}
|
|
|
|
static void __iomem *sa1111_gpio_map_reg(struct sa1111 *sachip, unsigned offset)
|
|
{
|
|
void __iomem *reg = sachip->base + SA1111_GPIO;
|
|
|
|
if (offset < 4)
|
|
return reg + SA1111_GPIO_PADDR;
|
|
if (offset < 10)
|
|
return reg + SA1111_GPIO_PBDDR;
|
|
if (offset < 18)
|
|
return reg + SA1111_GPIO_PCDDR;
|
|
return NULL;
|
|
}
|
|
|
|
static u32 sa1111_gpio_map_bit(unsigned offset)
|
|
{
|
|
if (offset < 4)
|
|
return BIT(offset);
|
|
if (offset < 10)
|
|
return BIT(offset - 4);
|
|
if (offset < 18)
|
|
return BIT(offset - 10);
|
|
return 0;
|
|
}
|
|
|
|
static void sa1111_gpio_modify(void __iomem *reg, u32 mask, u32 set)
|
|
{
|
|
u32 val;
|
|
|
|
val = readl_relaxed(reg);
|
|
val &= ~mask;
|
|
val |= mask & set;
|
|
writel_relaxed(val, reg);
|
|
}
|
|
|
|
static int sa1111_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
|
|
u32 mask = sa1111_gpio_map_bit(offset);
|
|
|
|
return !!(readl_relaxed(reg + SA1111_GPIO_PXDDR) & mask);
|
|
}
|
|
|
|
static int sa1111_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
unsigned long flags;
|
|
void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
|
|
u32 mask = sa1111_gpio_map_bit(offset);
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, mask);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, mask);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sa1111_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
|
|
int value)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
unsigned long flags;
|
|
void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
|
|
u32 mask = sa1111_gpio_map_bit(offset);
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, 0);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, 0);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sa1111_gpio_get(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
|
|
u32 mask = sa1111_gpio_map_bit(offset);
|
|
|
|
return !!(readl_relaxed(reg + SA1111_GPIO_PXDRR) & mask);
|
|
}
|
|
|
|
static void sa1111_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
unsigned long flags;
|
|
void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
|
|
u32 mask = sa1111_gpio_map_bit(offset);
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
static void sa1111_gpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
|
|
unsigned long *bits)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
unsigned long flags;
|
|
void __iomem *reg = sachip->base + SA1111_GPIO;
|
|
u32 msk, val;
|
|
|
|
msk = *mask;
|
|
val = *bits;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PADWR, msk & 15, val);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PASSR, msk & 15, val);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PBDWR, (msk >> 4) & 255, val >> 4);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PBSSR, (msk >> 4) & 255, val >> 4);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PCDWR, (msk >> 12) & 255, val >> 12);
|
|
sa1111_gpio_modify(reg + SA1111_GPIO_PCSSR, (msk >> 12) & 255, val >> 12);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
static int sa1111_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct sa1111 *sachip = gc_to_sa1111(gc);
|
|
|
|
return sa1111_map_irq(sachip, offset);
|
|
}
|
|
|
|
static int sa1111_setup_gpios(struct sa1111 *sachip)
|
|
{
|
|
sachip->gc.label = "sa1111";
|
|
sachip->gc.parent = sachip->dev;
|
|
sachip->gc.owner = THIS_MODULE;
|
|
sachip->gc.get_direction = sa1111_gpio_get_direction;
|
|
sachip->gc.direction_input = sa1111_gpio_direction_input;
|
|
sachip->gc.direction_output = sa1111_gpio_direction_output;
|
|
sachip->gc.get = sa1111_gpio_get;
|
|
sachip->gc.set = sa1111_gpio_set;
|
|
sachip->gc.set_multiple = sa1111_gpio_set_multiple;
|
|
sachip->gc.to_irq = sa1111_gpio_to_irq;
|
|
sachip->gc.base = -1;
|
|
sachip->gc.ngpio = 18;
|
|
|
|
return devm_gpiochip_add_data(sachip->dev, &sachip->gc, sachip);
|
|
}
|
|
|
|
/*
|
|
* Bring the SA1111 out of reset. This requires a set procedure:
|
|
* 1. nRESET asserted (by hardware)
|
|
* 2. CLK turned on from SA1110
|
|
* 3. nRESET deasserted
|
|
* 4. VCO turned on, PLL_BYPASS turned off
|
|
* 5. Wait lock time, then assert RCLKEn
|
|
* 7. PCR set to allow clocking of individual functions
|
|
*
|
|
* Until we've done this, the only registers we can access are:
|
|
* SBI_SKCR
|
|
* SBI_SMCR
|
|
* SBI_SKID
|
|
*/
|
|
static void sa1111_wake(struct sa1111 *sachip)
|
|
{
|
|
unsigned long flags, r;
|
|
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
|
|
clk_enable(sachip->clk);
|
|
|
|
/*
|
|
* Turn VCO on, and disable PLL Bypass.
|
|
*/
|
|
r = readl_relaxed(sachip->base + SA1111_SKCR);
|
|
r &= ~SKCR_VCO_OFF;
|
|
writel_relaxed(r, sachip->base + SA1111_SKCR);
|
|
r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
|
|
writel_relaxed(r, sachip->base + SA1111_SKCR);
|
|
|
|
/*
|
|
* Wait lock time. SA1111 manual _doesn't_
|
|
* specify a figure for this! We choose 100us.
|
|
*/
|
|
udelay(100);
|
|
|
|
/*
|
|
* Enable RCLK. We also ensure that RDYEN is set.
|
|
*/
|
|
r |= SKCR_RCLKEN | SKCR_RDYEN;
|
|
writel_relaxed(r, sachip->base + SA1111_SKCR);
|
|
|
|
/*
|
|
* Wait 14 RCLK cycles for the chip to finish coming out
|
|
* of reset. (RCLK=24MHz). This is 590ns.
|
|
*/
|
|
udelay(1);
|
|
|
|
/*
|
|
* Ensure all clocks are initially off.
|
|
*/
|
|
writel_relaxed(0, sachip->base + SA1111_SKPCR);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
|
|
static u32 sa1111_dma_mask[] = {
|
|
~0,
|
|
~(1 << 20),
|
|
~(1 << 23),
|
|
~(1 << 24),
|
|
~(1 << 25),
|
|
~(1 << 20),
|
|
~(1 << 20),
|
|
0,
|
|
};
|
|
|
|
/*
|
|
* Configure the SA1111 shared memory controller.
|
|
*/
|
|
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;
|
|
|
|
writel_relaxed(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 = to_sa1111_device(_dev);
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
static int
|
|
sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
|
|
struct sa1111_dev_info *info)
|
|
{
|
|
struct sa1111_dev *dev;
|
|
unsigned i;
|
|
int ret;
|
|
|
|
dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
|
|
if (!dev) {
|
|
ret = -ENOMEM;
|
|
goto err_alloc;
|
|
}
|
|
|
|
device_initialize(&dev->dev);
|
|
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->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;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(info->hwirq); i++)
|
|
dev->hwirq[i] = info->hwirq[i];
|
|
|
|
/*
|
|
* If the parent device has a DMA mask associated with it, and
|
|
* this child supports DMA, propagate it down to the children.
|
|
*/
|
|
if (info->dma && sachip->dev->dma_mask) {
|
|
dev->dma_mask = *sachip->dev->dma_mask;
|
|
dev->dev.dma_mask = &dev->dma_mask;
|
|
dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
|
|
}
|
|
|
|
ret = request_resource(parent, &dev->res);
|
|
if (ret) {
|
|
dev_err(sachip->dev, "failed to allocate resource for %s\n",
|
|
dev->res.name);
|
|
goto err_resource;
|
|
}
|
|
|
|
ret = device_add(&dev->dev);
|
|
if (ret)
|
|
goto err_add;
|
|
return 0;
|
|
|
|
err_add:
|
|
release_resource(&dev->res);
|
|
err_resource:
|
|
put_device(&dev->dev);
|
|
err_alloc:
|
|
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.
|
|
* %-EINVAL no platform data passed
|
|
* %0 successful.
|
|
*/
|
|
static int __sa1111_probe(struct device *me, struct resource *mem, int irq)
|
|
{
|
|
struct sa1111_platform_data *pd = me->platform_data;
|
|
struct sa1111 *sachip;
|
|
unsigned long id;
|
|
unsigned int has_devs;
|
|
int i, ret = -ENODEV;
|
|
|
|
if (!pd)
|
|
return -EINVAL;
|
|
|
|
sachip = devm_kzalloc(me, sizeof(struct sa1111), GFP_KERNEL);
|
|
if (!sachip)
|
|
return -ENOMEM;
|
|
|
|
sachip->clk = devm_clk_get(me, "SA1111_CLK");
|
|
if (IS_ERR(sachip->clk))
|
|
return PTR_ERR(sachip->clk);
|
|
|
|
ret = clk_prepare(sachip->clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_init(&sachip->lock);
|
|
|
|
sachip->dev = me;
|
|
dev_set_drvdata(sachip->dev, sachip);
|
|
|
|
sachip->pdata = pd;
|
|
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_clk_unprep;
|
|
}
|
|
|
|
/*
|
|
* Probe for the chip. Only touch the SBI registers.
|
|
*/
|
|
id = readl_relaxed(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;
|
|
}
|
|
|
|
pr_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);
|
|
|
|
/*
|
|
* The interrupt controller must be initialised before any
|
|
* other device to ensure that the interrupts are available.
|
|
*/
|
|
ret = sa1111_setup_irq(sachip, pd->irq_base);
|
|
if (ret)
|
|
goto err_clk;
|
|
|
|
/* Setup the GPIOs - should really be done after the IRQ setup */
|
|
ret = sa1111_setup_gpios(sachip);
|
|
if (ret)
|
|
goto err_irq;
|
|
|
|
#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 = readl_relaxed(sachip->base + SA1111_SKPCR);
|
|
writel_relaxed(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
|
|
|
|
/*
|
|
* Enable the SA1110 memory bus request and grant signals.
|
|
*/
|
|
sa1110_mb_enable();
|
|
}
|
|
#endif
|
|
|
|
g_sa1111 = sachip;
|
|
|
|
has_devs = ~0;
|
|
if (pd)
|
|
has_devs &= ~pd->disable_devs;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
|
|
if (sa1111_devices[i].devid & has_devs)
|
|
sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
sa1111_remove_irq(sachip);
|
|
err_clk:
|
|
clk_disable(sachip->clk);
|
|
err_unmap:
|
|
iounmap(sachip->base);
|
|
err_clk_unprep:
|
|
clk_unprepare(sachip->clk);
|
|
return ret;
|
|
}
|
|
|
|
static int sa1111_remove_one(struct device *dev, void *data)
|
|
{
|
|
struct sa1111_dev *sadev = to_sa1111_device(dev);
|
|
if (dev->bus != &sa1111_bus_type)
|
|
return 0;
|
|
device_del(&sadev->dev);
|
|
release_resource(&sadev->res);
|
|
put_device(&sadev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static void __sa1111_remove(struct sa1111 *sachip)
|
|
{
|
|
device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
|
|
|
|
sa1111_remove_irq(sachip);
|
|
|
|
clk_disable(sachip->clk);
|
|
clk_unprepare(sachip->clk);
|
|
|
|
iounmap(sachip->base);
|
|
}
|
|
|
|
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_noirq(struct device *dev)
|
|
{
|
|
struct sa1111 *sachip = dev_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 = readl_relaxed(base + SA1111_SKCR);
|
|
save->skpcr = readl_relaxed(base + SA1111_SKPCR);
|
|
save->skcdr = readl_relaxed(base + SA1111_SKCDR);
|
|
save->skaud = readl_relaxed(base + SA1111_SKAUD);
|
|
save->skpwm0 = readl_relaxed(base + SA1111_SKPWM0);
|
|
save->skpwm1 = readl_relaxed(base + SA1111_SKPWM1);
|
|
|
|
writel_relaxed(0, sachip->base + SA1111_SKPWM0);
|
|
writel_relaxed(0, sachip->base + SA1111_SKPWM1);
|
|
|
|
base = sachip->base + SA1111_INTC;
|
|
save->intpol0 = readl_relaxed(base + SA1111_INTPOL0);
|
|
save->intpol1 = readl_relaxed(base + SA1111_INTPOL1);
|
|
save->inten0 = readl_relaxed(base + SA1111_INTEN0);
|
|
save->inten1 = readl_relaxed(base + SA1111_INTEN1);
|
|
save->wakepol0 = readl_relaxed(base + SA1111_WAKEPOL0);
|
|
save->wakepol1 = readl_relaxed(base + SA1111_WAKEPOL1);
|
|
save->wakeen0 = readl_relaxed(base + SA1111_WAKEEN0);
|
|
save->wakeen1 = readl_relaxed(base + SA1111_WAKEEN1);
|
|
|
|
/*
|
|
* Disable.
|
|
*/
|
|
val = readl_relaxed(sachip->base + SA1111_SKCR);
|
|
writel_relaxed(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
|
|
|
|
clk_disable(sachip->clk);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
sa1110_mb_disable();
|
|
#endif
|
|
|
|
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_noirq(struct device *dev)
|
|
{
|
|
struct sa1111 *sachip = dev_get_drvdata(dev);
|
|
struct sa1111_save_data *save;
|
|
unsigned long flags, id;
|
|
void __iomem *base;
|
|
|
|
save = sachip->saved_state;
|
|
if (!save)
|
|
return 0;
|
|
|
|
/*
|
|
* Ensure that the SA1111 is still here.
|
|
* FIXME: shouldn't do this here.
|
|
*/
|
|
id = readl_relaxed(sachip->base + SA1111_SKID);
|
|
if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
|
|
__sa1111_remove(sachip);
|
|
dev_set_drvdata(dev, NULL);
|
|
kfree(save);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* First of all, wake up the chip.
|
|
*/
|
|
sa1111_wake(sachip);
|
|
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
/* Enable the memory bus request/grant signals */
|
|
sa1110_mb_enable();
|
|
#endif
|
|
|
|
/*
|
|
* Only lock for write ops. Also, sa1111_wake must be called with
|
|
* released spinlock!
|
|
*/
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
|
|
writel_relaxed(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
|
|
writel_relaxed(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
|
|
|
|
base = sachip->base;
|
|
writel_relaxed(save->skcr, base + SA1111_SKCR);
|
|
writel_relaxed(save->skpcr, base + SA1111_SKPCR);
|
|
writel_relaxed(save->skcdr, base + SA1111_SKCDR);
|
|
writel_relaxed(save->skaud, base + SA1111_SKAUD);
|
|
writel_relaxed(save->skpwm0, base + SA1111_SKPWM0);
|
|
writel_relaxed(save->skpwm1, base + SA1111_SKPWM1);
|
|
|
|
base = sachip->base + SA1111_INTC;
|
|
writel_relaxed(save->intpol0, base + SA1111_INTPOL0);
|
|
writel_relaxed(save->intpol1, base + SA1111_INTPOL1);
|
|
writel_relaxed(save->inten0, base + SA1111_INTEN0);
|
|
writel_relaxed(save->inten1, base + SA1111_INTEN1);
|
|
writel_relaxed(save->wakepol0, base + SA1111_WAKEPOL0);
|
|
writel_relaxed(save->wakepol1, base + SA1111_WAKEPOL1);
|
|
writel_relaxed(save->wakeen0, base + SA1111_WAKEEN0);
|
|
writel_relaxed(save->wakeen1, base + SA1111_WAKEEN1);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
sachip->saved_state = NULL;
|
|
kfree(save);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define sa1111_suspend_noirq NULL
|
|
#define sa1111_resume_noirq NULL
|
|
#endif
|
|
|
|
static int 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 irq;
|
|
|
|
return __sa1111_probe(&pdev->dev, mem, irq);
|
|
}
|
|
|
|
static int sa1111_remove(struct platform_device *pdev)
|
|
{
|
|
struct sa1111 *sachip = platform_get_drvdata(pdev);
|
|
|
|
if (sachip) {
|
|
#ifdef CONFIG_PM
|
|
kfree(sachip->saved_state);
|
|
sachip->saved_state = NULL;
|
|
#endif
|
|
__sa1111_remove(sachip);
|
|
platform_set_drvdata(pdev, NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dev_pm_ops sa1111_pm_ops = {
|
|
.suspend_noirq = sa1111_suspend_noirq,
|
|
.resume_noirq = sa1111_resume_noirq,
|
|
};
|
|
|
|
/*
|
|
* 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,
|
|
.driver = {
|
|
.name = "sa1111",
|
|
.pm = &sa1111_pm_ops,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* 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 = readl_relaxed(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);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_pll_clock);
|
|
|
|
/**
|
|
* 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 = readl_relaxed(sachip->base + SA1111_SKCR);
|
|
if (mode == SA1111_AUDIO_I2S) {
|
|
val &= ~SKCR_SELAC;
|
|
} else {
|
|
val |= SKCR_SELAC;
|
|
}
|
|
writel_relaxed(val, sachip->base + SA1111_SKCR);
|
|
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_select_audio_mode);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
writel_relaxed(div - 1, sachip->base + SA1111_SKAUD);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sa1111_set_audio_rate);
|
|
|
|
/**
|
|
* 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 = readl_relaxed(sachip->base + SA1111_SKAUD) + 1;
|
|
|
|
return __sa1111_pll_clock(sachip) / (256 * div);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_get_audio_rate);
|
|
|
|
/*
|
|
* Individual device operations.
|
|
*/
|
|
|
|
/**
|
|
* sa1111_enable_device - enable an on-chip SA1111 function block
|
|
* @sadev: SA1111 function block device to enable
|
|
*/
|
|
int sa1111_enable_device(struct sa1111_dev *sadev)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
unsigned long flags;
|
|
unsigned int val;
|
|
int ret = 0;
|
|
|
|
if (sachip->pdata && sachip->pdata->enable)
|
|
ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid);
|
|
|
|
if (ret == 0) {
|
|
spin_lock_irqsave(&sachip->lock, flags);
|
|
val = readl_relaxed(sachip->base + SA1111_SKPCR);
|
|
writel_relaxed(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(sa1111_enable_device);
|
|
|
|
/**
|
|
* 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 = readl_relaxed(sachip->base + SA1111_SKPCR);
|
|
writel_relaxed(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
|
|
spin_unlock_irqrestore(&sachip->lock, flags);
|
|
|
|
if (sachip->pdata && sachip->pdata->disable)
|
|
sachip->pdata->disable(sachip->pdata->data, sadev->devid);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_disable_device);
|
|
|
|
int sa1111_get_irq(struct sa1111_dev *sadev, unsigned num)
|
|
{
|
|
struct sa1111 *sachip = sa1111_chip_driver(sadev);
|
|
if (num >= ARRAY_SIZE(sadev->hwirq))
|
|
return -EINVAL;
|
|
return sa1111_map_irq(sachip, sadev->hwirq[num]);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sa1111_get_irq);
|
|
|
|
/*
|
|
* 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 = to_sa1111_device(_dev);
|
|
struct sa1111_driver *drv = SA1111_DRV(_drv);
|
|
|
|
return !!(dev->devid & drv->devid);
|
|
}
|
|
|
|
static int sa1111_bus_probe(struct device *dev)
|
|
{
|
|
struct sa1111_dev *sadev = to_sa1111_device(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 = to_sa1111_device(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,
|
|
};
|
|
EXPORT_SYMBOL(sa1111_bus_type);
|
|
|
|
int sa1111_driver_register(struct sa1111_driver *driver)
|
|
{
|
|
driver->drv.bus = &sa1111_bus_type;
|
|
return driver_register(&driver->drv);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_driver_register);
|
|
|
|
void sa1111_driver_unregister(struct sa1111_driver *driver)
|
|
{
|
|
driver_unregister(&driver->drv);
|
|
}
|
|
EXPORT_SYMBOL(sa1111_driver_unregister);
|
|
|
|
#ifdef CONFIG_DMABOUNCE
|
|
/*
|
|
* 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.
|
|
*/
|
|
static int sa1111_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);
|
|
}
|
|
|
|
static int sa1111_notifier_call(struct notifier_block *n, unsigned long action,
|
|
void *data)
|
|
{
|
|
struct sa1111_dev *dev = to_sa1111_device(data);
|
|
|
|
switch (action) {
|
|
case BUS_NOTIFY_ADD_DEVICE:
|
|
if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) {
|
|
int ret = dmabounce_register_dev(&dev->dev, 1024, 4096,
|
|
sa1111_needs_bounce);
|
|
if (ret)
|
|
dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret);
|
|
}
|
|
break;
|
|
|
|
case BUS_NOTIFY_DEL_DEVICE:
|
|
if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL)
|
|
dmabounce_unregister_dev(&dev->dev);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block sa1111_bus_notifier = {
|
|
.notifier_call = sa1111_notifier_call,
|
|
};
|
|
#endif
|
|
|
|
static int __init sa1111_init(void)
|
|
{
|
|
int ret = bus_register(&sa1111_bus_type);
|
|
#ifdef CONFIG_DMABOUNCE
|
|
if (ret == 0)
|
|
bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
|
|
#endif
|
|
if (ret == 0)
|
|
platform_driver_register(&sa1111_device_driver);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit sa1111_exit(void)
|
|
{
|
|
platform_driver_unregister(&sa1111_device_driver);
|
|
#ifdef CONFIG_DMABOUNCE
|
|
bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
|
|
#endif
|
|
bus_unregister(&sa1111_bus_type);
|
|
}
|
|
|
|
subsys_initcall(sa1111_init);
|
|
module_exit(sa1111_exit);
|
|
|
|
MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
|
|
MODULE_LICENSE("GPL");
|