1 files changed, 0 insertions, 464 deletions
diff --git a/arch/arm/plat-stmp3xxx/dma.c b/arch/arm/plat-stmp3xxx/dma.c
deleted file mode 100644
index b4dcf8c0477..00000000000
--- a/arch/arm/plat-stmp3xxx/dma.c
+++ /dev/null
@@ -1,464 +0,0 @@
-/*
- * DMA helper routines for Freescale STMP37XX/STMP378X
- *
- * Author: dmitry pervushin <dpervushin@embeddedalley.com>
- *
- * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
- */
-
-/*
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
- */
-#include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/dmapool.h>
-#include <linux/sysdev.h>
-#include <linux/cpufreq.h>
-
-#include <asm/page.h>
-
-#include <mach/platform.h>
-#include <mach/dma.h>
-#include <mach/regs-apbx.h>
-#include <mach/regs-apbh.h>
-
-static const size_t pool_item_size = sizeof(struct stmp3xxx_dma_command);
-static const size_t pool_alignment = 8;
-static struct stmp3xxx_dma_user {
-	void *pool;
-	int inuse;
-	const char *name;
-} channels[MAX_DMA_CHANNELS];
-
-#define IS_VALID_CHANNEL(ch) ((ch) >= 0 && (ch) < MAX_DMA_CHANNELS)
-#define IS_USED(ch) (channels[ch].inuse)
-
-int stmp3xxx_dma_request(int ch, struct device *dev, const char *name)
-{
-	struct stmp3xxx_dma_user *user;
-	int err = 0;
-
-	user = channels + ch;
-	if (!IS_VALID_CHANNEL(ch)) {
-		err = -ENODEV;
-		goto out;
-	}
-	if (IS_USED(ch)) {
-		err = -EBUSY;
-		goto out;
-	}
-	/* Create a pool to allocate dma commands from */
-	user->pool = dma_pool_create(name, dev, pool_item_size,
-				     pool_alignment, PAGE_SIZE);
-	if (user->pool == NULL) {
-		err = -ENOMEM;
-		goto out;
-	}
-	user->name = name;
-	user->inuse++;
-out:
-	return err;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_request);
-
-int stmp3xxx_dma_release(int ch)
-{
-	struct stmp3xxx_dma_user *user = channels + ch;
-	int err = 0;
-
-	if (!IS_VALID_CHANNEL(ch)) {
-		err = -ENODEV;
-		goto out;
-	}
-	if (!IS_USED(ch)) {
-		err = -EBUSY;
-		goto out;
-	}
-	BUG_ON(user->pool == NULL);
-	dma_pool_destroy(user->pool);
-	user->inuse--;
-out:
-	return err;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_release);
-
-int stmp3xxx_dma_read_semaphore(int channel)
-{
-	int sem = -1;
-
-	switch (STMP3XXX_DMA_BUS(channel)) {
-	case STMP3XXX_BUS_APBH:
-		sem = __raw_readl(REGS_APBH_BASE + HW_APBH_CHn_SEMA +
-				STMP3XXX_DMA_CHANNEL(channel) * 0x70);
-		sem &= BM_APBH_CHn_SEMA_PHORE;
-		sem >>= BP_APBH_CHn_SEMA_PHORE;
-		break;
-
-	case STMP3XXX_BUS_APBX:
-		sem = __raw_readl(REGS_APBX_BASE + HW_APBX_CHn_SEMA +
-				STMP3XXX_DMA_CHANNEL(channel) * 0x70);
-		sem &= BM_APBX_CHn_SEMA_PHORE;
-		sem >>= BP_APBX_CHn_SEMA_PHORE;
-		break;
-	default:
-		BUG();
-	}
-	return sem;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_read_semaphore);
-
-int stmp3xxx_dma_allocate_command(int channel,
-				  struct stmp3xxx_dma_descriptor *descriptor)
-{
-	struct stmp3xxx_dma_user *user = channels + channel;
-	int err = 0;
-
-	if (!IS_VALID_CHANNEL(channel)) {
-		err = -ENODEV;
-		goto out;
-	}
-	if (!IS_USED(channel)) {
-		err = -EBUSY;
-		goto out;
-	}
-	if (descriptor == NULL) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	/* Allocate memory for a command from the buffer */
-	descriptor->command =
-	    dma_pool_alloc(user->pool, GFP_KERNEL, &descriptor->handle);
-
-	/* Check it worked */
-	if (!descriptor->command) {
-		err = -ENOMEM;
-		goto out;
-	}
-
-	memset(descriptor->command, 0, pool_item_size);
-out:
-	WARN_ON(err);
-	return err;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_allocate_command);
-
-int stmp3xxx_dma_free_command(int channel,
-			      struct stmp3xxx_dma_descriptor *descriptor)
-{
-	int err = 0;
-
-	if (!IS_VALID_CHANNEL(channel)) {
-		err = -ENODEV;
-		goto out;
-	}
-	if (!IS_USED(channel)) {
-		err = -EBUSY;
-		goto out;
-	}
-
-	/* Return the command memory to the pool */
-	dma_pool_free(channels[channel].pool, descriptor->command,
-		      descriptor->handle);
-
-	/* Initialise descriptor so we're not tempted to use it */
-	descriptor->command = NULL;
-	descriptor->handle = 0;
-	descriptor->virtual_buf_ptr = NULL;
-	descriptor->next_descr = NULL;
-
-	WARN_ON(err);
-out:
-	return err;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_free_command);
-
-void stmp3xxx_dma_go(int channel,
-		     struct stmp3xxx_dma_descriptor *head, u32 semaphore)
-{
-	int ch = STMP3XXX_DMA_CHANNEL(channel);
-	void __iomem *c, *s;
-
-	switch (STMP3XXX_DMA_BUS(channel)) {
-	case STMP3XXX_BUS_APBH:
-		c = REGS_APBH_BASE + HW_APBH_CHn_NXTCMDAR + 0x70 * ch;
-		s = REGS_APBH_BASE + HW_APBH_CHn_SEMA + 0x70 * ch;
-		break;
-
-	case STMP3XXX_BUS_APBX:
-		c = REGS_APBX_BASE + HW_APBX_CHn_NXTCMDAR + 0x70 * ch;
-		s = REGS_APBX_BASE + HW_APBX_CHn_SEMA + 0x70 * ch;
-		break;
-
-	default:
-		return;
-	}
-
-	/* Set next command */
-	__raw_writel(head->handle, c);
-	/* Set counting semaphore (kicks off transfer). Assumes
-	   peripheral has been set up correctly */
-	__raw_writel(semaphore, s);
-}
-EXPORT_SYMBOL(stmp3xxx_dma_go);
-
-int stmp3xxx_dma_running(int channel)
-{
-	switch (STMP3XXX_DMA_BUS(channel)) {
-	case STMP3XXX_BUS_APBH:
-		return (__raw_readl(REGS_APBH_BASE + HW_APBH_CHn_SEMA +
-			0x70 * STMP3XXX_DMA_CHANNEL(channel))) &
-			    BM_APBH_CHn_SEMA_PHORE;
-
-	case STMP3XXX_BUS_APBX:
-		return (__raw_readl(REGS_APBX_BASE + HW_APBX_CHn_SEMA +
-			0x70 * STMP3XXX_DMA_CHANNEL(channel))) &
-			    BM_APBX_CHn_SEMA_PHORE;
-	default:
-		BUG();
-		return 0;
-	}
-}
-EXPORT_SYMBOL(stmp3xxx_dma_running);
-
-/*
- * Circular dma chain management
- */
-void stmp3xxx_dma_free_chain(struct stmp37xx_circ_dma_chain *chain)
-{
-	int i;
-
-	for (i = 0; i < chain->total_count; i++)
-		stmp3xxx_dma_free_command(
-			STMP3XXX_DMA(chain->channel, chain->bus),
-			&chain->chain[i]);
-}
-EXPORT_SYMBOL(stmp3xxx_dma_free_chain);
-
-int stmp3xxx_dma_make_chain(int ch, struct stmp37xx_circ_dma_chain *chain,
-			    struct stmp3xxx_dma_descriptor descriptors[],
-			    unsigned items)
-{
-	int i;
-	int err = 0;
-
-	if (items == 0)
-		return err;
-
-	for (i = 0; i < items; i++) {
-		err = stmp3xxx_dma_allocate_command(ch, &descriptors[i]);
-		if (err) {
-			WARN_ON(err);
-			/*
-			 * Couldn't allocate the whole chain.
-			 * deallocate what has been allocated
-			 */
-			if (i) {
-				do {
-					stmp3xxx_dma_free_command(ch,
-								  &descriptors
-								  [i]);
-				} while (i-- > 0);
-			}
-			return err;
-		}
-
-		/* link them! */
-		if (i > 0) {
-			descriptors[i - 1].next_descr = &descriptors[i];
-			descriptors[i - 1].command->next =
-						descriptors[i].handle;
-		}
-	}
-
-	/* make list circular */
-	descriptors[items - 1].next_descr = &descriptors[0];
-	descriptors[items - 1].command->next = descriptors[0].handle;
-
-	chain->total_count = items;
-	chain->chain = descriptors;
-	chain->free_index = 0;
-	chain->active_index = 0;
-	chain->cooked_index = 0;
-	chain->free_count = items;
-	chain->active_count = 0;
-	chain->cooked_count = 0;
-	chain->bus = STMP3XXX_DMA_BUS(ch);
-	chain->channel = STMP3XXX_DMA_CHANNEL(ch);
-	return err;
-}
-EXPORT_SYMBOL(stmp3xxx_dma_make_chain);
-
-void stmp37xx_circ_clear_chain(struct stmp37xx_circ_dma_chain *chain)
-{
-	BUG_ON(stmp3xxx_dma_running(STMP3XXX_DMA(chain->channel, chain->bus)));
-	chain->free_index = 0;
-	chain->active_index = 0;
-	chain->cooked_index = 0;
-	chain->free_count = chain->total_count;
-	chain->active_count = 0;
-	chain->cooked_count = 0;
-}
-EXPORT_SYMBOL(stmp37xx_circ_clear_chain);
-
-void stmp37xx_circ_advance_free(struct stmp37xx_circ_dma_chain *chain,
-		unsigned count)
-{
-	BUG_ON(chain->cooked_count < count);
-
-	chain->cooked_count -= count;
-	chain->cooked_index += count;
-	chain->cooked_index %= chain->total_count;
-	chain->free_count += count;
-}
-EXPORT_SYMBOL(stmp37xx_circ_advance_free);
-
-void stmp37xx_circ_advance_active(struct stmp37xx_circ_dma_chain *chain,
-		unsigned count)
-{
-	void __iomem *c;
-	u32 mask_clr, mask;
-	BUG_ON(chain->free_count < count);
-
-	chain->free_count -= count;
-	chain->free_index += count;
-	chain->free_index %= chain->total_count;
-	chain->active_count += count;
-
-	switch (chain->bus) {
-	case STMP3XXX_BUS_APBH:
-		c = REGS_APBH_BASE + HW_APBH_CHn_SEMA + 0x70 * chain->channel;
-		mask_clr = BM_APBH_CHn_SEMA_INCREMENT_SEMA;
-		mask = BF(count, APBH_CHn_SEMA_INCREMENT_SEMA);
-		break;
-	case STMP3XXX_BUS_APBX:
-		c = REGS_APBX_BASE + HW_APBX_CHn_SEMA + 0x70 * chain->channel;
-		mask_clr = BM_APBX_CHn_SEMA_INCREMENT_SEMA;
-		mask = BF(count, APBX_CHn_SEMA_INCREMENT_SEMA);
-		break;
-	default:
-		BUG();
-		return;
-	}
-
-	/* Set counting semaphore (kicks off transfer). Assumes
-	   peripheral has been set up correctly */
-	stmp3xxx_clearl(mask_clr, c);
-	stmp3xxx_setl(mask, c);
-}
-EXPORT_SYMBOL(stmp37xx_circ_advance_active);
-
-unsigned stmp37xx_circ_advance_cooked(struct stmp37xx_circ_dma_chain *chain)
-{
-	unsigned cooked;
-
-	cooked = chain->active_count -
-	  stmp3xxx_dma_read_semaphore(STMP3XXX_DMA(chain->channel, chain->bus));
-
-	chain->active_count -= cooked;
-	chain->active_index += cooked;
-	chain->active_index %= chain->total_count;
-
-	chain->cooked_count += cooked;
-
-	return cooked;
-}
-EXPORT_SYMBOL(stmp37xx_circ_advance_cooked);
-
-void stmp3xxx_dma_set_alt_target(int channel, int function)
-{
-#if defined(CONFIG_ARCH_STMP37XX)
-	unsigned bits = 4;
-#elif defined(CONFIG_ARCH_STMP378X)
-	unsigned bits = 2;
-#else
-#error wrong arch
-#endif
-	int shift = STMP3XXX_DMA_CHANNEL(channel) * bits;
-	unsigned mask = (1<<bits) - 1;
-	void __iomem *c;
-
-	BUG_ON(function < 0 || function >= (1<<bits));
-	pr_debug("%s: channel = %d, using mask %x, "
-		 "shift = %d\n", __func__, channel, mask, shift);
-
-	switch (STMP3XXX_DMA_BUS(channel)) {
-	case STMP3XXX_BUS_APBH:
-		c = REGS_APBH_BASE + HW_APBH_DEVSEL;
-		break;
-	case STMP3XXX_BUS_APBX:
-		c = REGS_APBX_BASE + HW_APBX_DEVSEL;
-		break;
-	default:
-		BUG();
-	}
-	stmp3xxx_clearl(mask << shift, c);
-	stmp3xxx_setl(mask << shift, c);
-}
-EXPORT_SYMBOL(stmp3xxx_dma_set_alt_target);
-
-void stmp3xxx_dma_suspend(void)
-{
-	stmp3xxx_setl(BM_APBH_CTRL0_CLKGATE, REGS_APBH_BASE + HW_APBH_CTRL0);
-	stmp3xxx_setl(BM_APBX_CTRL0_CLKGATE, REGS_APBX_BASE + HW_APBX_CTRL0);
-}
-
-void stmp3xxx_dma_resume(void)
-{
-	stmp3xxx_clearl(BM_APBH_CTRL0_CLKGATE | BM_APBH_CTRL0_SFTRST,
-			REGS_APBH_BASE + HW_APBH_CTRL0);
-	stmp3xxx_clearl(BM_APBX_CTRL0_CLKGATE | BM_APBX_CTRL0_SFTRST,
-			REGS_APBX_BASE + HW_APBX_CTRL0);
-}
-
-#ifdef CONFIG_CPU_FREQ
-
-struct dma_notifier_block {
-	struct notifier_block nb;
-	void *data;
-};
-
-static int dma_cpufreq_notifier(struct notifier_block *self,
-				unsigned long phase, void *p)
-{
-	switch (phase) {
-	case CPUFREQ_POSTCHANGE:
-		stmp3xxx_dma_resume();
-		break;
-
-	case CPUFREQ_PRECHANGE:
-		stmp3xxx_dma_suspend();
-		break;
-
-	default:
-		break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-static struct dma_notifier_block dma_cpufreq_nb = {
-	.nb = {
-		.notifier_call = dma_cpufreq_notifier,
-	},
-};
-#endif /* CONFIG_CPU_FREQ */
-
-void __init stmp3xxx_dma_init(void)
-{
-	stmp3xxx_clearl(BM_APBH_CTRL0_CLKGATE | BM_APBH_CTRL0_SFTRST,
-			REGS_APBH_BASE + HW_APBH_CTRL0);
-	stmp3xxx_clearl(BM_APBX_CTRL0_CLKGATE | BM_APBX_CTRL0_SFTRST,
-			REGS_APBX_BASE + HW_APBX_CTRL0);
-#ifdef CONFIG_CPU_FREQ
-	cpufreq_register_notifier(&dma_cpufreq_nb.nb,
-				CPUFREQ_TRANSITION_NOTIFIER);
-#endif /* CONFIG_CPU_FREQ */
-}