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-rw-r--r--arch/arm/mach-pxa/ssp.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
deleted file mode 100644
index 1fddfeaa630..00000000000
--- a/arch/arm/mach-pxa/ssp.c
+++ /dev/null
@@ -1,337 +0,0 @@
-/*
- * linux/arch/arm/mach-pxa/ssp.c
- *
- * based on linux/arch/arm/mach-sa1100/ssp.c by Russell King
- *
- * Copyright (C) 2003 Russell King.
- * Copyright (C) 2003 Wolfson Microelectronics PLC
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * PXA2xx SSP driver. This provides the generic core for simple
- * IO-based SSP applications and allows easy port setup for DMA access.
- *
- * Author: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
- *
- * Revision history:
- * 22nd Aug 2003 Initial version.
- * 20th Dec 2004 Added ssp_config for changing port config without
- * closing the port.
- * 4th Aug 2005 Added option to disable irq handler registration and
- * cleaned up irq and clock detection.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/mutex.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/hardware.h>
-#include <asm/arch/ssp.h>
-#include <asm/arch/pxa-regs.h>
-
-#define PXA_SSP_PORTS 3
-
-#define TIMEOUT 100000
-
-struct ssp_info_ {
- int irq;
- u32 clock;
-};
-
-/*
- * SSP port clock and IRQ settings
- */
-static const struct ssp_info_ ssp_info[PXA_SSP_PORTS] = {
-#if defined (CONFIG_PXA27x)
- {IRQ_SSP, CKEN23_SSP1},
- {IRQ_SSP2, CKEN3_SSP2},
- {IRQ_SSP3, CKEN4_SSP3},
-#else
- {IRQ_SSP, CKEN3_SSP},
- {IRQ_NSSP, CKEN9_NSSP},
- {IRQ_ASSP, CKEN10_ASSP},
-#endif
-};
-
-static DEFINE_MUTEX(mutex);
-static int use_count[PXA_SSP_PORTS] = {0, 0, 0};
-
-static irqreturn_t ssp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct ssp_dev *dev = (struct ssp_dev*) dev_id;
- unsigned int status = SSSR_P(dev->port);
-
- SSSR_P(dev->port) = status; /* clear status bits */
-
- if (status & SSSR_ROR)
- printk(KERN_WARNING "SSP(%d): receiver overrun\n", dev->port);
-
- if (status & SSSR_TUR)
- printk(KERN_WARNING "SSP(%d): transmitter underrun\n", dev->port);
-
- if (status & SSSR_BCE)
- printk(KERN_WARNING "SSP(%d): bit count error\n", dev->port);
-
- return IRQ_HANDLED;
-}
-
-/**
- * ssp_write_word - write a word to the SSP port
- * @data: 32-bit, MSB justified data to write.
- *
- * Wait for a free entry in the SSP transmit FIFO, and write a data
- * word to the SSP port.
- *
- * The caller is expected to perform the necessary locking.
- *
- * Returns:
- * %-ETIMEDOUT timeout occurred
- * 0 success
- */
-int ssp_write_word(struct ssp_dev *dev, u32 data)
-{
- int timeout = TIMEOUT;
-
- while (!(SSSR_P(dev->port) & SSSR_TNF)) {
- if (!--timeout)
- return -ETIMEDOUT;
- cpu_relax();
- }
-
- SSDR_P(dev->port) = data;
-
- return 0;
-}
-
-/**
- * ssp_read_word - read a word from the SSP port
- *
- * Wait for a data word in the SSP receive FIFO, and return the
- * received data. Data is LSB justified.
- *
- * Note: Currently, if data is not expected to be received, this
- * function will wait for ever.
- *
- * The caller is expected to perform the necessary locking.
- *
- * Returns:
- * %-ETIMEDOUT timeout occurred
- * 32-bit data success
- */
-int ssp_read_word(struct ssp_dev *dev, u32 *data)
-{
- int timeout = TIMEOUT;
-
- while (!(SSSR_P(dev->port) & SSSR_RNE)) {
- if (!--timeout)
- return -ETIMEDOUT;
- cpu_relax();
- }
-
- *data = SSDR_P(dev->port);
- return 0;
-}
-
-/**
- * ssp_flush - flush the transmit and receive FIFOs
- *
- * Wait for the SSP to idle, and ensure that the receive FIFO
- * is empty.
- *
- * The caller is expected to perform the necessary locking.
- */
-int ssp_flush(struct ssp_dev *dev)
-{
- int timeout = TIMEOUT * 2;
-
- do {
- while (SSSR_P(dev->port) & SSSR_RNE) {
- if (!--timeout)
- return -ETIMEDOUT;
- (void) SSDR_P(dev->port);
- }
- if (!--timeout)
- return -ETIMEDOUT;
- } while (SSSR_P(dev->port) & SSSR_BSY);
-
- return 0;
-}
-
-/**
- * ssp_enable - enable the SSP port
- *
- * Turn on the SSP port.
- */
-void ssp_enable(struct ssp_dev *dev)
-{
- SSCR0_P(dev->port) |= SSCR0_SSE;
-}
-
-/**
- * ssp_disable - shut down the SSP port
- *
- * Turn off the SSP port, optionally powering it down.
- */
-void ssp_disable(struct ssp_dev *dev)
-{
- SSCR0_P(dev->port) &= ~SSCR0_SSE;
-}
-
-/**
- * ssp_save_state - save the SSP configuration
- * @ssp: pointer to structure to save SSP configuration
- *
- * Save the configured SSP state for suspend.
- */
-void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp)
-{
- ssp->cr0 = SSCR0_P(dev->port);
- ssp->cr1 = SSCR1_P(dev->port);
- ssp->to = SSTO_P(dev->port);
- ssp->psp = SSPSP_P(dev->port);
-
- SSCR0_P(dev->port) &= ~SSCR0_SSE;
-}
-
-/**
- * ssp_restore_state - restore a previously saved SSP configuration
- * @ssp: pointer to configuration saved by ssp_save_state
- *
- * Restore the SSP configuration saved previously by ssp_save_state.
- */
-void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp)
-{
- SSSR_P(dev->port) = SSSR_ROR | SSSR_TUR | SSSR_BCE;
-
- SSCR0_P(dev->port) = ssp->cr0 & ~SSCR0_SSE;
- SSCR1_P(dev->port) = ssp->cr1;
- SSTO_P(dev->port) = ssp->to;
- SSPSP_P(dev->port) = ssp->psp;
-
- SSCR0_P(dev->port) = ssp->cr0;
-}
-
-/**
- * ssp_config - configure SSP port settings
- * @mode: port operating mode
- * @flags: port config flags
- * @psp_flags: port PSP config flags
- * @speed: port speed
- *
- * Port MUST be disabled by ssp_disable before making any config changes.
- */
-int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed)
-{
- dev->mode = mode;
- dev->flags = flags;
- dev->psp_flags = psp_flags;
- dev->speed = speed;
-
- /* set up port type, speed, port settings */
- SSCR0_P(dev->port) = (dev->speed | dev->mode);
- SSCR1_P(dev->port) = dev->flags;
- SSPSP_P(dev->port) = dev->psp_flags;
-
- return 0;
-}
-
-/**
- * ssp_init - setup the SSP port
- *
- * initialise and claim resources for the SSP port.
- *
- * Returns:
- * %-ENODEV if the SSP port is unavailable
- * %-EBUSY if the resources are already in use
- * %0 on success
- */
-int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
-{
- int ret;
-
- if (port > PXA_SSP_PORTS || port == 0)
- return -ENODEV;
-
- mutex_lock(&mutex);
- if (use_count[port - 1]) {
- mutex_unlock(&mutex);
- return -EBUSY;
- }
- use_count[port - 1]++;
-
- if (!request_mem_region(__PREG(SSCR0_P(port)), 0x2c, "SSP")) {
- use_count[port - 1]--;
- mutex_unlock(&mutex);
- return -EBUSY;
- }
- dev->port = port;
-
- /* do we need to get irq */
- if (!(init_flags & SSP_NO_IRQ)) {
- ret = request_irq(ssp_info[port-1].irq, ssp_interrupt,
- 0, "SSP", dev);
- if (ret)
- goto out_region;
- dev->irq = ssp_info[port-1].irq;
- } else
- dev->irq = 0;
-
- /* turn on SSP port clock */
- pxa_set_cken(ssp_info[port-1].clock, 1);
- mutex_unlock(&mutex);
- return 0;
-
-out_region:
- release_mem_region(__PREG(SSCR0_P(port)), 0x2c);
- use_count[port - 1]--;
- mutex_unlock(&mutex);
- return ret;
-}
-
-/**
- * ssp_exit - undo the effects of ssp_init
- *
- * release and free resources for the SSP port.
- */
-void ssp_exit(struct ssp_dev *dev)
-{
- mutex_lock(&mutex);
- SSCR0_P(dev->port) &= ~SSCR0_SSE;
-
- if (dev->port > PXA_SSP_PORTS || dev->port == 0) {
- printk(KERN_WARNING "SSP: tried to close invalid port\n");
- return;
- }
-
- pxa_set_cken(ssp_info[dev->port-1].clock, 0);
- if (dev->irq)
- free_irq(dev->irq, dev);
- release_mem_region(__PREG(SSCR0_P(dev->port)), 0x2c);
- use_count[dev->port - 1]--;
- mutex_unlock(&mutex);
-}
-
-EXPORT_SYMBOL(ssp_write_word);
-EXPORT_SYMBOL(ssp_read_word);
-EXPORT_SYMBOL(ssp_flush);
-EXPORT_SYMBOL(ssp_enable);
-EXPORT_SYMBOL(ssp_disable);
-EXPORT_SYMBOL(ssp_save_state);
-EXPORT_SYMBOL(ssp_restore_state);
-EXPORT_SYMBOL(ssp_init);
-EXPORT_SYMBOL(ssp_exit);
-EXPORT_SYMBOL(ssp_config);
-
-MODULE_DESCRIPTION("PXA SSP driver");
-MODULE_AUTHOR("Liam Girdwood");
-MODULE_LICENSE("GPL");
-
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