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-rw-r--r--arch/arm/mach-davinci/dma.c1591
1 files changed, 0 insertions, 1591 deletions
diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c
deleted file mode 100644
index 45b7c71d9cc1..000000000000
--- a/arch/arm/mach-davinci/dma.c
+++ /dev/null
@@ -1,1591 +0,0 @@
-/*
- * EDMA3 support for DaVinci
- *
- * Copyright (C) 2006-2009 Texas Instruments.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <mach/edma.h>
-
-/* Offsets matching "struct edmacc_param" */
-#define PARM_OPT 0x00
-#define PARM_SRC 0x04
-#define PARM_A_B_CNT 0x08
-#define PARM_DST 0x0c
-#define PARM_SRC_DST_BIDX 0x10
-#define PARM_LINK_BCNTRLD 0x14
-#define PARM_SRC_DST_CIDX 0x18
-#define PARM_CCNT 0x1c
-
-#define PARM_SIZE 0x20
-
-/* Offsets for EDMA CC global channel registers and their shadows */
-#define SH_ER 0x00 /* 64 bits */
-#define SH_ECR 0x08 /* 64 bits */
-#define SH_ESR 0x10 /* 64 bits */
-#define SH_CER 0x18 /* 64 bits */
-#define SH_EER 0x20 /* 64 bits */
-#define SH_EECR 0x28 /* 64 bits */
-#define SH_EESR 0x30 /* 64 bits */
-#define SH_SER 0x38 /* 64 bits */
-#define SH_SECR 0x40 /* 64 bits */
-#define SH_IER 0x50 /* 64 bits */
-#define SH_IECR 0x58 /* 64 bits */
-#define SH_IESR 0x60 /* 64 bits */
-#define SH_IPR 0x68 /* 64 bits */
-#define SH_ICR 0x70 /* 64 bits */
-#define SH_IEVAL 0x78
-#define SH_QER 0x80
-#define SH_QEER 0x84
-#define SH_QEECR 0x88
-#define SH_QEESR 0x8c
-#define SH_QSER 0x90
-#define SH_QSECR 0x94
-#define SH_SIZE 0x200
-
-/* Offsets for EDMA CC global registers */
-#define EDMA_REV 0x0000
-#define EDMA_CCCFG 0x0004
-#define EDMA_QCHMAP 0x0200 /* 8 registers */
-#define EDMA_DMAQNUM 0x0240 /* 8 registers (4 on OMAP-L1xx) */
-#define EDMA_QDMAQNUM 0x0260
-#define EDMA_QUETCMAP 0x0280
-#define EDMA_QUEPRI 0x0284
-#define EDMA_EMR 0x0300 /* 64 bits */
-#define EDMA_EMCR 0x0308 /* 64 bits */
-#define EDMA_QEMR 0x0310
-#define EDMA_QEMCR 0x0314
-#define EDMA_CCERR 0x0318
-#define EDMA_CCERRCLR 0x031c
-#define EDMA_EEVAL 0x0320
-#define EDMA_DRAE 0x0340 /* 4 x 64 bits*/
-#define EDMA_QRAE 0x0380 /* 4 registers */
-#define EDMA_QUEEVTENTRY 0x0400 /* 2 x 16 registers */
-#define EDMA_QSTAT 0x0600 /* 2 registers */
-#define EDMA_QWMTHRA 0x0620
-#define EDMA_QWMTHRB 0x0624
-#define EDMA_CCSTAT 0x0640
-
-#define EDMA_M 0x1000 /* global channel registers */
-#define EDMA_ECR 0x1008
-#define EDMA_ECRH 0x100C
-#define EDMA_SHADOW0 0x2000 /* 4 regions shadowing global channels */
-#define EDMA_PARM 0x4000 /* 128 param entries */
-
-#define PARM_OFFSET(param_no) (EDMA_PARM + ((param_no) << 5))
-
-#define EDMA_DCHMAP 0x0100 /* 64 registers */
-#define CHMAP_EXIST BIT(24)
-
-#define EDMA_MAX_DMACH 64
-#define EDMA_MAX_PARAMENTRY 512
-
-/*****************************************************************************/
-
-static void __iomem *edmacc_regs_base[EDMA_MAX_CC];
-
-static inline unsigned int edma_read(unsigned ctlr, int offset)
-{
- return (unsigned int)__raw_readl(edmacc_regs_base[ctlr] + offset);
-}
-
-static inline void edma_write(unsigned ctlr, int offset, int val)
-{
- __raw_writel(val, edmacc_regs_base[ctlr] + offset);
-}
-static inline void edma_modify(unsigned ctlr, int offset, unsigned and,
- unsigned or)
-{
- unsigned val = edma_read(ctlr, offset);
- val &= and;
- val |= or;
- edma_write(ctlr, offset, val);
-}
-static inline void edma_and(unsigned ctlr, int offset, unsigned and)
-{
- unsigned val = edma_read(ctlr, offset);
- val &= and;
- edma_write(ctlr, offset, val);
-}
-static inline void edma_or(unsigned ctlr, int offset, unsigned or)
-{
- unsigned val = edma_read(ctlr, offset);
- val |= or;
- edma_write(ctlr, offset, val);
-}
-static inline unsigned int edma_read_array(unsigned ctlr, int offset, int i)
-{
- return edma_read(ctlr, offset + (i << 2));
-}
-static inline void edma_write_array(unsigned ctlr, int offset, int i,
- unsigned val)
-{
- edma_write(ctlr, offset + (i << 2), val);
-}
-static inline void edma_modify_array(unsigned ctlr, int offset, int i,
- unsigned and, unsigned or)
-{
- edma_modify(ctlr, offset + (i << 2), and, or);
-}
-static inline void edma_or_array(unsigned ctlr, int offset, int i, unsigned or)
-{
- edma_or(ctlr, offset + (i << 2), or);
-}
-static inline void edma_or_array2(unsigned ctlr, int offset, int i, int j,
- unsigned or)
-{
- edma_or(ctlr, offset + ((i*2 + j) << 2), or);
-}
-static inline void edma_write_array2(unsigned ctlr, int offset, int i, int j,
- unsigned val)
-{
- edma_write(ctlr, offset + ((i*2 + j) << 2), val);
-}
-static inline unsigned int edma_shadow0_read(unsigned ctlr, int offset)
-{
- return edma_read(ctlr, EDMA_SHADOW0 + offset);
-}
-static inline unsigned int edma_shadow0_read_array(unsigned ctlr, int offset,
- int i)
-{
- return edma_read(ctlr, EDMA_SHADOW0 + offset + (i << 2));
-}
-static inline void edma_shadow0_write(unsigned ctlr, int offset, unsigned val)
-{
- edma_write(ctlr, EDMA_SHADOW0 + offset, val);
-}
-static inline void edma_shadow0_write_array(unsigned ctlr, int offset, int i,
- unsigned val)
-{
- edma_write(ctlr, EDMA_SHADOW0 + offset + (i << 2), val);
-}
-static inline unsigned int edma_parm_read(unsigned ctlr, int offset,
- int param_no)
-{
- return edma_read(ctlr, EDMA_PARM + offset + (param_no << 5));
-}
-static inline void edma_parm_write(unsigned ctlr, int offset, int param_no,
- unsigned val)
-{
- edma_write(ctlr, EDMA_PARM + offset + (param_no << 5), val);
-}
-static inline void edma_parm_modify(unsigned ctlr, int offset, int param_no,
- unsigned and, unsigned or)
-{
- edma_modify(ctlr, EDMA_PARM + offset + (param_no << 5), and, or);
-}
-static inline void edma_parm_and(unsigned ctlr, int offset, int param_no,
- unsigned and)
-{
- edma_and(ctlr, EDMA_PARM + offset + (param_no << 5), and);
-}
-static inline void edma_parm_or(unsigned ctlr, int offset, int param_no,
- unsigned or)
-{
- edma_or(ctlr, EDMA_PARM + offset + (param_no << 5), or);
-}
-
-static inline void set_bits(int offset, int len, unsigned long *p)
-{
- for (; len > 0; len--)
- set_bit(offset + (len - 1), p);
-}
-
-static inline void clear_bits(int offset, int len, unsigned long *p)
-{
- for (; len > 0; len--)
- clear_bit(offset + (len - 1), p);
-}
-
-/*****************************************************************************/
-
-/* actual number of DMA channels and slots on this silicon */
-struct edma {
- /* how many dma resources of each type */
- unsigned num_channels;
- unsigned num_region;
- unsigned num_slots;
- unsigned num_tc;
- unsigned num_cc;
- enum dma_event_q default_queue;
-
- /* list of channels with no even trigger; terminated by "-1" */
- const s8 *noevent;
-
- /* The edma_inuse bit for each PaRAM slot is clear unless the
- * channel is in use ... by ARM or DSP, for QDMA, or whatever.
- */
- DECLARE_BITMAP(edma_inuse, EDMA_MAX_PARAMENTRY);
-
- /* The edma_unused bit for each channel is clear unless
- * it is not being used on this platform. It uses a bit
- * of SOC-specific initialization code.
- */
- DECLARE_BITMAP(edma_unused, EDMA_MAX_DMACH);
-
- unsigned irq_res_start;
- unsigned irq_res_end;
-
- struct dma_interrupt_data {
- void (*callback)(unsigned channel, unsigned short ch_status,
- void *data);
- void *data;
- } intr_data[EDMA_MAX_DMACH];
-};
-
-static struct edma *edma_cc[EDMA_MAX_CC];
-static int arch_num_cc;
-
-/* dummy param set used to (re)initialize parameter RAM slots */
-static const struct edmacc_param dummy_paramset = {
- .link_bcntrld = 0xffff,
- .ccnt = 1,
-};
-
-/*****************************************************************************/
-
-static void map_dmach_queue(unsigned ctlr, unsigned ch_no,
- enum dma_event_q queue_no)
-{
- int bit = (ch_no & 0x7) * 4;
-
- /* default to low priority queue */
- if (queue_no == EVENTQ_DEFAULT)
- queue_no = edma_cc[ctlr]->default_queue;
-
- queue_no &= 7;
- edma_modify_array(ctlr, EDMA_DMAQNUM, (ch_no >> 3),
- ~(0x7 << bit), queue_no << bit);
-}
-
-static void __init map_queue_tc(unsigned ctlr, int queue_no, int tc_no)
-{
- int bit = queue_no * 4;
- edma_modify(ctlr, EDMA_QUETCMAP, ~(0x7 << bit), ((tc_no & 0x7) << bit));
-}
-
-static void __init assign_priority_to_queue(unsigned ctlr, int queue_no,
- int priority)
-{
- int bit = queue_no * 4;
- edma_modify(ctlr, EDMA_QUEPRI, ~(0x7 << bit),
- ((priority & 0x7) << bit));
-}
-
-/**
- * map_dmach_param - Maps channel number to param entry number
- *
- * This maps the dma channel number to param entry numberter. In
- * other words using the DMA channel mapping registers a param entry
- * can be mapped to any channel
- *
- * Callers are responsible for ensuring the channel mapping logic is
- * included in that particular EDMA variant (Eg : dm646x)
- *
- */
-static void __init map_dmach_param(unsigned ctlr)
-{
- int i;
- for (i = 0; i < EDMA_MAX_DMACH; i++)
- edma_write_array(ctlr, EDMA_DCHMAP , i , (i << 5));
-}
-
-static inline void
-setup_dma_interrupt(unsigned lch,
- void (*callback)(unsigned channel, u16 ch_status, void *data),
- void *data)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(lch);
- lch = EDMA_CHAN_SLOT(lch);
-
- if (!callback)
- edma_shadow0_write_array(ctlr, SH_IECR, lch >> 5,
- BIT(lch & 0x1f));
-
- edma_cc[ctlr]->intr_data[lch].callback = callback;
- edma_cc[ctlr]->intr_data[lch].data = data;
-
- if (callback) {
- edma_shadow0_write_array(ctlr, SH_ICR, lch >> 5,
- BIT(lch & 0x1f));
- edma_shadow0_write_array(ctlr, SH_IESR, lch >> 5,
- BIT(lch & 0x1f));
- }
-}
-
-static int irq2ctlr(int irq)
-{
- if (irq >= edma_cc[0]->irq_res_start && irq <= edma_cc[0]->irq_res_end)
- return 0;
- else if (irq >= edma_cc[1]->irq_res_start &&
- irq <= edma_cc[1]->irq_res_end)
- return 1;
-
- return -1;
-}
-
-/******************************************************************************
- *
- * DMA interrupt handler
- *
- *****************************************************************************/
-static irqreturn_t dma_irq_handler(int irq, void *data)
-{
- int ctlr;
- u32 sh_ier;
- u32 sh_ipr;
- u32 bank;
-
- ctlr = irq2ctlr(irq);
- if (ctlr < 0)
- return IRQ_NONE;
-
- dev_dbg(data, "dma_irq_handler\n");
-
- sh_ipr = edma_shadow0_read_array(ctlr, SH_IPR, 0);
- if (!sh_ipr) {
- sh_ipr = edma_shadow0_read_array(ctlr, SH_IPR, 1);
- if (!sh_ipr)
- return IRQ_NONE;
- sh_ier = edma_shadow0_read_array(ctlr, SH_IER, 1);
- bank = 1;
- } else {
- sh_ier = edma_shadow0_read_array(ctlr, SH_IER, 0);
- bank = 0;
- }
-
- do {
- u32 slot;
- u32 channel;
-
- dev_dbg(data, "IPR%d %08x\n", bank, sh_ipr);
-
- slot = __ffs(sh_ipr);
- sh_ipr &= ~(BIT(slot));
-
- if (sh_ier & BIT(slot)) {
- channel = (bank << 5) | slot;
- /* Clear the corresponding IPR bits */
- edma_shadow0_write_array(ctlr, SH_ICR, bank,
- BIT(slot));
- if (edma_cc[ctlr]->intr_data[channel].callback)
- edma_cc[ctlr]->intr_data[channel].callback(
- channel, DMA_COMPLETE,
- edma_cc[ctlr]->intr_data[channel].data);
- }
- } while (sh_ipr);
-
- edma_shadow0_write(ctlr, SH_IEVAL, 1);
- return IRQ_HANDLED;
-}
-
-/******************************************************************************
- *
- * DMA error interrupt handler
- *
- *****************************************************************************/
-static irqreturn_t dma_ccerr_handler(int irq, void *data)
-{
- int i;
- int ctlr;
- unsigned int cnt = 0;
-
- ctlr = irq2ctlr(irq);
- if (ctlr < 0)
- return IRQ_NONE;
-
- dev_dbg(data, "dma_ccerr_handler\n");
-
- if ((edma_read_array(ctlr, EDMA_EMR, 0) == 0) &&
- (edma_read_array(ctlr, EDMA_EMR, 1) == 0) &&
- (edma_read(ctlr, EDMA_QEMR) == 0) &&
- (edma_read(ctlr, EDMA_CCERR) == 0))
- return IRQ_NONE;
-
- while (1) {
- int j = -1;
- if (edma_read_array(ctlr, EDMA_EMR, 0))
- j = 0;
- else if (edma_read_array(ctlr, EDMA_EMR, 1))
- j = 1;
- if (j >= 0) {
- dev_dbg(data, "EMR%d %08x\n", j,
- edma_read_array(ctlr, EDMA_EMR, j));
- for (i = 0; i < 32; i++) {
- int k = (j << 5) + i;
- if (edma_read_array(ctlr, EDMA_EMR, j) &
- BIT(i)) {
- /* Clear the corresponding EMR bits */
- edma_write_array(ctlr, EDMA_EMCR, j,
- BIT(i));
- /* Clear any SER */
- edma_shadow0_write_array(ctlr, SH_SECR,
- j, BIT(i));
- if (edma_cc[ctlr]->intr_data[k].
- callback) {
- edma_cc[ctlr]->intr_data[k].
- callback(k,
- DMA_CC_ERROR,
- edma_cc[ctlr]->intr_data
- [k].data);
- }
- }
- }
- } else if (edma_read(ctlr, EDMA_QEMR)) {
- dev_dbg(data, "QEMR %02x\n",
- edma_read(ctlr, EDMA_QEMR));
- for (i = 0; i < 8; i++) {
- if (edma_read(ctlr, EDMA_QEMR) & BIT(i)) {
- /* Clear the corresponding IPR bits */
- edma_write(ctlr, EDMA_QEMCR, BIT(i));
- edma_shadow0_write(ctlr, SH_QSECR,
- BIT(i));
-
- /* NOTE: not reported!! */
- }
- }
- } else if (edma_read(ctlr, EDMA_CCERR)) {
- dev_dbg(data, "CCERR %08x\n",
- edma_read(ctlr, EDMA_CCERR));
- /* FIXME: CCERR.BIT(16) ignored! much better
- * to just write CCERRCLR with CCERR value...
- */
- for (i = 0; i < 8; i++) {
- if (edma_read(ctlr, EDMA_CCERR) & BIT(i)) {
- /* Clear the corresponding IPR bits */
- edma_write(ctlr, EDMA_CCERRCLR, BIT(i));
-
- /* NOTE: not reported!! */
- }
- }
- }
- if ((edma_read_array(ctlr, EDMA_EMR, 0) == 0) &&
- (edma_read_array(ctlr, EDMA_EMR, 1) == 0) &&
- (edma_read(ctlr, EDMA_QEMR) == 0) &&
- (edma_read(ctlr, EDMA_CCERR) == 0))
- break;
- cnt++;
- if (cnt > 10)
- break;
- }
- edma_write(ctlr, EDMA_EEVAL, 1);
- return IRQ_HANDLED;
-}
-
-/******************************************************************************
- *
- * Transfer controller error interrupt handlers
- *
- *****************************************************************************/
-
-#define tc_errs_handled false /* disabled as long as they're NOPs */
-
-static irqreturn_t dma_tc0err_handler(int irq, void *data)
-{
- dev_dbg(data, "dma_tc0err_handler\n");
- return IRQ_HANDLED;
-}
-
-static irqreturn_t dma_tc1err_handler(int irq, void *data)
-{
- dev_dbg(data, "dma_tc1err_handler\n");
- return IRQ_HANDLED;
-}
-
-static int reserve_contiguous_slots(int ctlr, unsigned int id,
- unsigned int num_slots,
- unsigned int start_slot)
-{
- int i, j;
- unsigned int count = num_slots;
- int stop_slot = start_slot;
- DECLARE_BITMAP(tmp_inuse, EDMA_MAX_PARAMENTRY);
-
- for (i = start_slot; i < edma_cc[ctlr]->num_slots; ++i) {
- j = EDMA_CHAN_SLOT(i);
- if (!test_and_set_bit(j, edma_cc[ctlr]->edma_inuse)) {
- /* Record our current beginning slot */
- if (count == num_slots)
- stop_slot = i;
-
- count--;
- set_bit(j, tmp_inuse);
-
- if (count == 0)
- break;
- } else {
- clear_bit(j, tmp_inuse);
-
- if (id == EDMA_CONT_PARAMS_FIXED_EXACT) {
- stop_slot = i;
- break;
- } else {
- count = num_slots;
- }
- }
- }
-
- /*
- * We have to clear any bits that we set
- * if we run out parameter RAM slots, i.e we do find a set
- * of contiguous parameter RAM slots but do not find the exact number
- * requested as we may reach the total number of parameter RAM slots
- */
- if (i == edma_cc[ctlr]->num_slots)
- stop_slot = i;
-
- j = start_slot;
- for_each_set_bit_from(j, tmp_inuse, stop_slot)
- clear_bit(j, edma_cc[ctlr]->edma_inuse);
-
- if (count)
- return -EBUSY;
-
- for (j = i - num_slots + 1; j <= i; ++j)
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(j),
- &dummy_paramset, PARM_SIZE);
-
- return EDMA_CTLR_CHAN(ctlr, i - num_slots + 1);
-}
-
-static int prepare_unused_channel_list(struct device *dev, void *data)
-{
- struct platform_device *pdev = to_platform_device(dev);
- int i, ctlr;
-
- for (i = 0; i < pdev->num_resources; i++) {
- if ((pdev->resource[i].flags & IORESOURCE_DMA) &&
- (int)pdev->resource[i].start >= 0) {
- ctlr = EDMA_CTLR(pdev->resource[i].start);
- clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start),
- edma_cc[ctlr]->edma_unused);
- }
- }
-
- return 0;
-}
-
-/*-----------------------------------------------------------------------*/
-
-static bool unused_chan_list_done;
-
-/* Resource alloc/free: dma channels, parameter RAM slots */
-
-/**
- * edma_alloc_channel - allocate DMA channel and paired parameter RAM
- * @channel: specific channel to allocate; negative for "any unmapped channel"
- * @callback: optional; to be issued on DMA completion or errors
- * @data: passed to callback
- * @eventq_no: an EVENTQ_* constant, used to choose which Transfer
- * Controller (TC) executes requests using this channel. Use
- * EVENTQ_DEFAULT unless you really need a high priority queue.
- *
- * This allocates a DMA channel and its associated parameter RAM slot.
- * The parameter RAM is initialized to hold a dummy transfer.
- *
- * Normal use is to pass a specific channel number as @channel, to make
- * use of hardware events mapped to that channel. When the channel will
- * be used only for software triggering or event chaining, channels not
- * mapped to hardware events (or mapped to unused events) are preferable.
- *
- * DMA transfers start from a channel using edma_start(), or by
- * chaining. When the transfer described in that channel's parameter RAM
- * slot completes, that slot's data may be reloaded through a link.
- *
- * DMA errors are only reported to the @callback associated with the
- * channel driving that transfer, but transfer completion callbacks can
- * be sent to another channel under control of the TCC field in
- * the option word of the transfer's parameter RAM set. Drivers must not
- * use DMA transfer completion callbacks for channels they did not allocate.
- * (The same applies to TCC codes used in transfer chaining.)
- *
- * Returns the number of the channel, else negative errno.
- */
-int edma_alloc_channel(int channel,
- void (*callback)(unsigned channel, u16 ch_status, void *data),
- void *data,
- enum dma_event_q eventq_no)
-{
- unsigned i, done = 0, ctlr = 0;
- int ret = 0;
-
- if (!unused_chan_list_done) {
- /*
- * Scan all the platform devices to find out the EDMA channels
- * used and clear them in the unused list, making the rest
- * available for ARM usage.
- */
- ret = bus_for_each_dev(&platform_bus_type, NULL, NULL,
- prepare_unused_channel_list);
- if (ret < 0)
- return ret;
-
- unused_chan_list_done = true;
- }
-
- if (channel >= 0) {
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
- }
-
- if (channel < 0) {
- for (i = 0; i < arch_num_cc; i++) {
- channel = 0;
- for (;;) {
- channel = find_next_bit(edma_cc[i]->edma_unused,
- edma_cc[i]->num_channels,
- channel);
- if (channel == edma_cc[i]->num_channels)
- break;
- if (!test_and_set_bit(channel,
- edma_cc[i]->edma_inuse)) {
- done = 1;
- ctlr = i;
- break;
- }
- channel++;
- }
- if (done)
- break;
- }
- if (!done)
- return -ENOMEM;
- } else if (channel >= edma_cc[ctlr]->num_channels) {
- return -EINVAL;
- } else if (test_and_set_bit(channel, edma_cc[ctlr]->edma_inuse)) {
- return -EBUSY;
- }
-
- /* ensure access through shadow region 0 */
- edma_or_array2(ctlr, EDMA_DRAE, 0, channel >> 5, BIT(channel & 0x1f));
-
- /* ensure no events are pending */
- edma_stop(EDMA_CTLR_CHAN(ctlr, channel));
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel),
- &dummy_paramset, PARM_SIZE);
-
- if (callback)
- setup_dma_interrupt(EDMA_CTLR_CHAN(ctlr, channel),
- callback, data);
-
- map_dmach_queue(ctlr, channel, eventq_no);
-
- return EDMA_CTLR_CHAN(ctlr, channel);
-}
-EXPORT_SYMBOL(edma_alloc_channel);
-
-
-/**
- * edma_free_channel - deallocate DMA channel
- * @channel: dma channel returned from edma_alloc_channel()
- *
- * This deallocates the DMA channel and associated parameter RAM slot
- * allocated by edma_alloc_channel().
- *
- * Callers are responsible for ensuring the channel is inactive, and
- * will not be reactivated by linking, chaining, or software calls to
- * edma_start().
- */
-void edma_free_channel(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel >= edma_cc[ctlr]->num_channels)
- return;
-
- setup_dma_interrupt(channel, NULL, NULL);
- /* REVISIT should probably take out of shadow region 0 */
-
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel),
- &dummy_paramset, PARM_SIZE);
- clear_bit(channel, edma_cc[ctlr]->edma_inuse);
-}
-EXPORT_SYMBOL(edma_free_channel);
-
-/**
- * edma_alloc_slot - allocate DMA parameter RAM
- * @slot: specific slot to allocate; negative for "any unused slot"
- *
- * This allocates a parameter RAM slot, initializing it to hold a
- * dummy transfer. Slots allocated using this routine have not been
- * mapped to a hardware DMA channel, and will normally be used by
- * linking to them from a slot associated with a DMA channel.
- *
- * Normal use is to pass EDMA_SLOT_ANY as the @slot, but specific
- * slots may be allocated on behalf of DSP firmware.
- *
- * Returns the number of the slot, else negative errno.
- */
-int edma_alloc_slot(unsigned ctlr, int slot)
-{
- if (!edma_cc[ctlr])
- return -EINVAL;
-
- if (slot >= 0)
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < 0) {
- slot = edma_cc[ctlr]->num_channels;
- for (;;) {
- slot = find_next_zero_bit(edma_cc[ctlr]->edma_inuse,
- edma_cc[ctlr]->num_slots, slot);
- if (slot == edma_cc[ctlr]->num_slots)
- return -ENOMEM;
- if (!test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse))
- break;
- }
- } else if (slot < edma_cc[ctlr]->num_channels ||
- slot >= edma_cc[ctlr]->num_slots) {
- return -EINVAL;
- } else if (test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse)) {
- return -EBUSY;
- }
-
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
- &dummy_paramset, PARM_SIZE);
-
- return EDMA_CTLR_CHAN(ctlr, slot);
-}
-EXPORT_SYMBOL(edma_alloc_slot);
-
-/**
- * edma_free_slot - deallocate DMA parameter RAM
- * @slot: parameter RAM slot returned from edma_alloc_slot()
- *
- * This deallocates the parameter RAM slot allocated by edma_alloc_slot().
- * Callers are responsible for ensuring the slot is inactive, and will
- * not be activated.
- */
-void edma_free_slot(unsigned slot)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_channels ||
- slot >= edma_cc[ctlr]->num_slots)
- return;
-
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
- &dummy_paramset, PARM_SIZE);
- clear_bit(slot, edma_cc[ctlr]->edma_inuse);
-}
-EXPORT_SYMBOL(edma_free_slot);
-
-
-/**
- * edma_alloc_cont_slots- alloc contiguous parameter RAM slots
- * The API will return the starting point of a set of
- * contiguous parameter RAM slots that have been requested
- *
- * @id: can only be EDMA_CONT_PARAMS_ANY or EDMA_CONT_PARAMS_FIXED_EXACT
- * or EDMA_CONT_PARAMS_FIXED_NOT_EXACT
- * @count: number of contiguous Paramter RAM slots
- * @slot - the start value of Parameter RAM slot that should be passed if id
- * is EDMA_CONT_PARAMS_FIXED_EXACT or EDMA_CONT_PARAMS_FIXED_NOT_EXACT
- *
- * If id is EDMA_CONT_PARAMS_ANY then the API starts looking for a set of
- * contiguous Parameter RAM slots from parameter RAM 64 in the case of
- * DaVinci SOCs and 32 in the case of DA8xx SOCs.
- *
- * If id is EDMA_CONT_PARAMS_FIXED_EXACT then the API starts looking for a
- * set of contiguous parameter RAM slots from the "slot" that is passed as an
- * argument to the API.
- *
- * If id is EDMA_CONT_PARAMS_FIXED_NOT_EXACT then the API initially tries
- * starts looking for a set of contiguous parameter RAMs from the "slot"
- * that is passed as an argument to the API. On failure the API will try to
- * find a set of contiguous Parameter RAM slots from the remaining Parameter
- * RAM slots
- */
-int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count)
-{
- /*
- * The start slot requested should be greater than
- * the number of channels and lesser than the total number
- * of slots
- */
- if ((id != EDMA_CONT_PARAMS_ANY) &&
- (slot < edma_cc[ctlr]->num_channels ||
- slot >= edma_cc[ctlr]->num_slots))
- return -EINVAL;
-
- /*
- * The number of parameter RAM slots requested cannot be less than 1
- * and cannot be more than the number of slots minus the number of
- * channels
- */
- if (count < 1 || count >
- (edma_cc[ctlr]->num_slots - edma_cc[ctlr]->num_channels))
- return -EINVAL;
-
- switch (id) {
- case EDMA_CONT_PARAMS_ANY:
- return reserve_contiguous_slots(ctlr, id, count,
- edma_cc[ctlr]->num_channels);
- case EDMA_CONT_PARAMS_FIXED_EXACT:
- case EDMA_CONT_PARAMS_FIXED_NOT_EXACT:
- return reserve_contiguous_slots(ctlr, id, count, slot);
- default:
- return -EINVAL;
- }
-
-}
-EXPORT_SYMBOL(edma_alloc_cont_slots);
-
-/**
- * edma_free_cont_slots - deallocate DMA parameter RAM slots
- * @slot: first parameter RAM of a set of parameter RAM slots to be freed
- * @count: the number of contiguous parameter RAM slots to be freed
- *
- * This deallocates the parameter RAM slots allocated by
- * edma_alloc_cont_slots.
- * Callers/applications need to keep track of sets of contiguous
- * parameter RAM slots that have been allocated using the edma_alloc_cont_slots
- * API.
- * Callers are responsible for ensuring the slots are inactive, and will
- * not be activated.
- */
-int edma_free_cont_slots(unsigned slot, int count)
-{
- unsigned ctlr, slot_to_free;
- int i;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_channels ||
- slot >= edma_cc[ctlr]->num_slots ||
- count < 1)
- return -EINVAL;
-
- for (i = slot; i < slot + count; ++i) {
- ctlr = EDMA_CTLR(i);
- slot_to_free = EDMA_CHAN_SLOT(i);
-
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot_to_free),
- &dummy_paramset, PARM_SIZE);
- clear_bit(slot_to_free, edma_cc[ctlr]->edma_inuse);
- }
-
- return 0;
-}
-EXPORT_SYMBOL(edma_free_cont_slots);
-
-/*-----------------------------------------------------------------------*/
-
-/* Parameter RAM operations (i) -- read/write partial slots */
-
-/**
- * edma_set_src - set initial DMA source address in parameter RAM slot
- * @slot: parameter RAM slot being configured
- * @src_port: physical address of source (memory, controller FIFO, etc)
- * @addressMode: INCR, except in very rare cases
- * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the
- * width to use when addressing the fifo (e.g. W8BIT, W32BIT)
- *
- * Note that the source address is modified during the DMA transfer
- * according to edma_set_src_index().
- */
-void edma_set_src(unsigned slot, dma_addr_t src_port,
- enum address_mode mode, enum fifo_width width)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_slots) {
- unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
-
- if (mode) {
- /* set SAM and program FWID */
- i = (i & ~(EDMA_FWID)) | (SAM | ((width & 0x7) << 8));
- } else {
- /* clear SAM */
- i &= ~SAM;
- }
- edma_parm_write(ctlr, PARM_OPT, slot, i);
-
- /* set the source port address
- in source register of param structure */
- edma_parm_write(ctlr, PARM_SRC, slot, src_port);
- }
-}
-EXPORT_SYMBOL(edma_set_src);
-
-/**
- * edma_set_dest - set initial DMA destination address in parameter RAM slot
- * @slot: parameter RAM slot being configured
- * @dest_port: physical address of destination (memory, controller FIFO, etc)
- * @addressMode: INCR, except in very rare cases
- * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the
- * width to use when addressing the fifo (e.g. W8BIT, W32BIT)
- *
- * Note that the destination address is modified during the DMA transfer
- * according to edma_set_dest_index().
- */
-void edma_set_dest(unsigned slot, dma_addr_t dest_port,
- enum address_mode mode, enum fifo_width width)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_slots) {
- unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
-
- if (mode) {
- /* set DAM and program FWID */
- i = (i & ~(EDMA_FWID)) | (DAM | ((width & 0x7) << 8));
- } else {
- /* clear DAM */
- i &= ~DAM;
- }
- edma_parm_write(ctlr, PARM_OPT, slot, i);
- /* set the destination port address
- in dest register of param structure */
- edma_parm_write(ctlr, PARM_DST, slot, dest_port);
- }
-}
-EXPORT_SYMBOL(edma_set_dest);
-
-/**
- * edma_get_position - returns the current transfer points
- * @slot: parameter RAM slot being examined
- * @src: pointer to source port position
- * @dst: pointer to destination port position
- *
- * Returns current source and destination addresses for a particular
- * parameter RAM slot. Its channel should not be active when this is called.
- */
-void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst)
-{
- struct edmacc_param temp;
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- edma_read_slot(EDMA_CTLR_CHAN(ctlr, slot), &temp);
- if (src != NULL)
- *src = temp.src;
- if (dst != NULL)
- *dst = temp.dst;
-}
-EXPORT_SYMBOL(edma_get_position);
-
-/**
- * edma_set_src_index - configure DMA source address indexing
- * @slot: parameter RAM slot being configured
- * @src_bidx: byte offset between source arrays in a frame
- * @src_cidx: byte offset between source frames in a block
- *
- * Offsets are specified to support either contiguous or discontiguous
- * memory transfers, or repeated access to a hardware register, as needed.
- * When accessing hardware registers, both offsets are normally zero.
- */
-void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_slots) {
- edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
- 0xffff0000, src_bidx);
- edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
- 0xffff0000, src_cidx);
- }
-}
-EXPORT_SYMBOL(edma_set_src_index);
-
-/**
- * edma_set_dest_index - configure DMA destination address indexing
- * @slot: parameter RAM slot being configured
- * @dest_bidx: byte offset between destination arrays in a frame
- * @dest_cidx: byte offset between destination frames in a block
- *
- * Offsets are specified to support either contiguous or discontiguous
- * memory transfers, or repeated access to a hardware register, as needed.
- * When accessing hardware registers, both offsets are normally zero.
- */
-void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_slots) {
- edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
- 0x0000ffff, dest_bidx << 16);
- edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
- 0x0000ffff, dest_cidx << 16);
- }
-}
-EXPORT_SYMBOL(edma_set_dest_index);
-
-/**
- * edma_set_transfer_params - configure DMA transfer parameters
- * @slot: parameter RAM slot being configured
- * @acnt: how many bytes per array (at least one)
- * @bcnt: how many arrays per frame (at least one)
- * @ccnt: how many frames per block (at least one)
- * @bcnt_rld: used only for A-Synchronized transfers; this specifies
- * the value to reload into bcnt when it decrements to zero
- * @sync_mode: ASYNC or ABSYNC
- *
- * See the EDMA3 documentation to understand how to configure and link
- * transfers using the fields in PaRAM slots. If you are not doing it
- * all at once with edma_write_slot(), you will use this routine
- * plus two calls each for source and destination, setting the initial
- * address and saying how to index that address.
- *
- * An example of an A-Synchronized transfer is a serial link using a
- * single word shift register. In that case, @acnt would be equal to
- * that word size; the serial controller issues a DMA synchronization
- * event to transfer each word, and memory access by the DMA transfer
- * controller will be word-at-a-time.
- *
- * An example of an AB-Synchronized transfer is a device using a FIFO.
- * In that case, @acnt equals the FIFO width and @bcnt equals its depth.
- * The controller with the FIFO issues DMA synchronization events when
- * the FIFO threshold is reached, and the DMA transfer controller will
- * transfer one frame to (or from) the FIFO. It will probably use
- * efficient burst modes to access memory.
- */
-void edma_set_transfer_params(unsigned slot,
- u16 acnt, u16 bcnt, u16 ccnt,
- u16 bcnt_rld, enum sync_dimension sync_mode)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot < edma_cc[ctlr]->num_slots) {
- edma_parm_modify(ctlr, PARM_LINK_BCNTRLD, slot,
- 0x0000ffff, bcnt_rld << 16);
- if (sync_mode == ASYNC)
- edma_parm_and(ctlr, PARM_OPT, slot, ~SYNCDIM);
- else
- edma_parm_or(ctlr, PARM_OPT, slot, SYNCDIM);
- /* Set the acount, bcount, ccount registers */
- edma_parm_write(ctlr, PARM_A_B_CNT, slot, (bcnt << 16) | acnt);
- edma_parm_write(ctlr, PARM_CCNT, slot, ccnt);
- }
-}
-EXPORT_SYMBOL(edma_set_transfer_params);
-
-/**
- * edma_link - link one parameter RAM slot to another
- * @from: parameter RAM slot originating the link
- * @to: parameter RAM slot which is the link target
- *
- * The originating slot should not be part of any active DMA transfer.
- */
-void edma_link(unsigned from, unsigned to)
-{
- unsigned ctlr_from, ctlr_to;
-
- ctlr_from = EDMA_CTLR(from);
- from = EDMA_CHAN_SLOT(from);
- ctlr_to = EDMA_CTLR(to);
- to = EDMA_CHAN_SLOT(to);
-
- if (from >= edma_cc[ctlr_from]->num_slots)
- return;
- if (to >= edma_cc[ctlr_to]->num_slots)
- return;
- edma_parm_modify(ctlr_from, PARM_LINK_BCNTRLD, from, 0xffff0000,
- PARM_OFFSET(to));
-}
-EXPORT_SYMBOL(edma_link);
-
-/**
- * edma_unlink - cut link from one parameter RAM slot
- * @from: parameter RAM slot originating the link
- *
- * The originating slot should not be part of any active DMA transfer.
- * Its link is set to 0xffff.
- */
-void edma_unlink(unsigned from)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(from);
- from = EDMA_CHAN_SLOT(from);
-
- if (from >= edma_cc[ctlr]->num_slots)
- return;
- edma_parm_or(ctlr, PARM_LINK_BCNTRLD, from, 0xffff);
-}
-EXPORT_SYMBOL(edma_unlink);
-
-/*-----------------------------------------------------------------------*/
-
-/* Parameter RAM operations (ii) -- read/write whole parameter sets */
-
-/**
- * edma_write_slot - write parameter RAM data for slot
- * @slot: number of parameter RAM slot being modified
- * @param: data to be written into parameter RAM slot
- *
- * Use this to assign all parameters of a transfer at once. This
- * allows more efficient setup of transfers than issuing multiple
- * calls to set up those parameters in small pieces, and provides
- * complete control over all transfer options.
- */
-void edma_write_slot(unsigned slot, const struct edmacc_param *param)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot >= edma_cc[ctlr]->num_slots)
- return;
- memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), param,
- PARM_SIZE);
-}
-EXPORT_SYMBOL(edma_write_slot);
-
-/**
- * edma_read_slot - read parameter RAM data from slot
- * @slot: number of parameter RAM slot being copied
- * @param: where to store copy of parameter RAM data
- *
- * Use this to read data from a parameter RAM slot, perhaps to
- * save them as a template for later reuse.
- */
-void edma_read_slot(unsigned slot, struct edmacc_param *param)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(slot);
- slot = EDMA_CHAN_SLOT(slot);
-
- if (slot >= edma_cc[ctlr]->num_slots)
- return;
- memcpy_fromio(param, edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
- PARM_SIZE);
-}
-EXPORT_SYMBOL(edma_read_slot);
-
-/*-----------------------------------------------------------------------*/
-
-/* Various EDMA channel control operations */
-
-/**
- * edma_pause - pause dma on a channel
- * @channel: on which edma_start() has been called
- *
- * This temporarily disables EDMA hardware events on the specified channel,
- * preventing them from triggering new transfers on its behalf
- */
-void edma_pause(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel < edma_cc[ctlr]->num_channels) {
- unsigned int mask = BIT(channel & 0x1f);
-
- edma_shadow0_write_array(ctlr, SH_EECR, channel >> 5, mask);
- }
-}
-EXPORT_SYMBOL(edma_pause);
-
-/**
- * edma_resume - resumes dma on a paused channel
- * @channel: on which edma_pause() has been called
- *
- * This re-enables EDMA hardware events on the specified channel.
- */
-void edma_resume(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel < edma_cc[ctlr]->num_channels) {
- unsigned int mask = BIT(channel & 0x1f);
-
- edma_shadow0_write_array(ctlr, SH_EESR, channel >> 5, mask);
- }
-}
-EXPORT_SYMBOL(edma_resume);
-
-/**
- * edma_start - start dma on a channel
- * @channel: channel being activated
- *
- * Channels with event associations will be triggered by their hardware
- * events, and channels without such associations will be triggered by
- * software. (At this writing there is no interface for using software
- * triggers except with channels that don't support hardware triggers.)
- *
- * Returns zero on success, else negative errno.
- */
-int edma_start(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel < edma_cc[ctlr]->num_channels) {
- int j = channel >> 5;
- unsigned int mask = BIT(channel & 0x1f);
-
- /* EDMA channels without event association */
- if (test_bit(channel, edma_cc[ctlr]->edma_unused)) {
- pr_debug("EDMA: ESR%d %08x\n", j,
- edma_shadow0_read_array(ctlr, SH_ESR, j));
- edma_shadow0_write_array(ctlr, SH_ESR, j, mask);
- return 0;
- }
-
- /* EDMA channel with event association */
- pr_debug("EDMA: ER%d %08x\n", j,
- edma_shadow0_read_array(ctlr, SH_ER, j));
- /* Clear any pending event or error */
- edma_write_array(ctlr, EDMA_ECR, j, mask);
- edma_write_array(ctlr, EDMA_EMCR, j, mask);
- /* Clear any SER */
- edma_shadow0_write_array(ctlr, SH_SECR, j, mask);
- edma_shadow0_write_array(ctlr, SH_EESR, j, mask);
- pr_debug("EDMA: EER%d %08x\n", j,
- edma_shadow0_read_array(ctlr, SH_EER, j));
- return 0;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL(edma_start);
-
-/**
- * edma_stop - stops dma on the channel passed
- * @channel: channel being deactivated
- *
- * When @lch is a channel, any active transfer is paused and
- * all pending hardware events are cleared. The current transfer
- * may not be resumed, and the channel's Parameter RAM should be
- * reinitialized before being reused.
- */
-void edma_stop(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel < edma_cc[ctlr]->num_channels) {
- int j = channel >> 5;
- unsigned int mask = BIT(channel & 0x1f);
-
- edma_shadow0_write_array(ctlr, SH_EECR, j, mask);
- edma_shadow0_write_array(ctlr, SH_ECR, j, mask);
- edma_shadow0_write_array(ctlr, SH_SECR, j, mask);
- edma_write_array(ctlr, EDMA_EMCR, j, mask);
-
- pr_debug("EDMA: EER%d %08x\n", j,
- edma_shadow0_read_array(ctlr, SH_EER, j));
-
- /* REVISIT: consider guarding against inappropriate event
- * chaining by overwriting with dummy_paramset.
- */
- }
-}
-EXPORT_SYMBOL(edma_stop);
-
-/******************************************************************************
- *
- * It cleans ParamEntry qand bring back EDMA to initial state if media has
- * been removed before EDMA has finished.It is usedful for removable media.
- * Arguments:
- * ch_no - channel no
- *
- * Return: zero on success, or corresponding error no on failure
- *
- * FIXME this should not be needed ... edma_stop() should suffice.
- *
- *****************************************************************************/
-
-void edma_clean_channel(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel < edma_cc[ctlr]->num_channels) {
- int j = (channel >> 5);
- unsigned int mask = BIT(channel & 0x1f);
-
- pr_debug("EDMA: EMR%d %08x\n", j,
- edma_read_array(ctlr, EDMA_EMR, j));
- edma_shadow0_write_array(ctlr, SH_ECR, j, mask);
- /* Clear the corresponding EMR bits */
- edma_write_array(ctlr, EDMA_EMCR, j, mask);
- /* Clear any SER */
- edma_shadow0_write_array(ctlr, SH_SECR, j, mask);
- edma_write(ctlr, EDMA_CCERRCLR, BIT(16) | BIT(1) | BIT(0));
- }
-}
-EXPORT_SYMBOL(edma_clean_channel);
-
-/*
- * edma_clear_event - clear an outstanding event on the DMA channel
- * Arguments:
- * channel - channel number
- */
-void edma_clear_event(unsigned channel)
-{
- unsigned ctlr;
-
- ctlr = EDMA_CTLR(channel);
- channel = EDMA_CHAN_SLOT(channel);
-
- if (channel >= edma_cc[ctlr]->num_channels)
- return;
- if (channel < 32)
- edma_write(ctlr, EDMA_ECR, BIT(channel));
- else
- edma_write(ctlr, EDMA_ECRH, BIT(channel - 32));
-}
-EXPORT_SYMBOL(edma_clear_event);
-
-/*-----------------------------------------------------------------------*/
-
-static int __init edma_probe(struct platform_device *pdev)
-{
- struct edma_soc_info **info = pdev->dev.platform_data;
- const s8 (*queue_priority_mapping)[2];
- const s8 (*queue_tc_mapping)[2];
- int i, j, off, ln, found = 0;
- int status = -1;
- const s16 (*rsv_chans)[2];
- const s16 (*rsv_slots)[2];
- int irq[EDMA_MAX_CC] = {0, 0};
- int err_irq[EDMA_MAX_CC] = {0, 0};
- struct resource *r[EDMA_MAX_CC] = {NULL};
- resource_size_t len[EDMA_MAX_CC];
- char res_name[10];
- char irq_name[10];
-
- if (!info)
- return -ENODEV;
-
- for (j = 0; j < EDMA_MAX_CC; j++) {
- sprintf(res_name, "edma_cc%d", j);
- r[j] = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- res_name);
- if (!r[j] || !info[j]) {
- if (found)
- break;
- else
- return -ENODEV;
- } else {
- found = 1;
- }
-
- len[j] = resource_size(r[j]);
-
- r[j] = request_mem_region(r[j]->start, len[j],
- dev_name(&pdev->dev));
- if (!r[j]) {
- status = -EBUSY;
- goto fail1;
- }
-
- edmacc_regs_base[j] = ioremap(r[j]->start, len[j]);
- if (!edmacc_regs_base[j]) {
- status = -EBUSY;
- goto fail1;
- }
-
- edma_cc[j] = kzalloc(sizeof(struct edma), GFP_KERNEL);
- if (!edma_cc[j]) {
- status = -ENOMEM;
- goto fail1;
- }
-
- edma_cc[j]->num_channels = min_t(unsigned, info[j]->n_channel,
- EDMA_MAX_DMACH);
- edma_cc[j]->num_slots = min_t(unsigned, info[j]->n_slot,
- EDMA_MAX_PARAMENTRY);
- edma_cc[j]->num_cc = min_t(unsigned, info[j]->n_cc,
- EDMA_MAX_CC);
-
- edma_cc[j]->default_queue = info[j]->default_queue;
-
- dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n",
- edmacc_regs_base[j]);
-
- for (i = 0; i < edma_cc[j]->num_slots; i++)
- memcpy_toio(edmacc_regs_base[j] + PARM_OFFSET(i),
- &dummy_paramset, PARM_SIZE);
-
- /* Mark all channels as unused */
- memset(edma_cc[j]->edma_unused, 0xff,
- sizeof(edma_cc[j]->edma_unused));
-
- if (info[j]->rsv) {
-
- /* Clear the reserved channels in unused list */
- rsv_chans = info[j]->rsv->rsv_chans;
- if (rsv_chans) {
- for (i = 0; rsv_chans[i][0] != -1; i++) {
- off = rsv_chans[i][0];
- ln = rsv_chans[i][1];
- clear_bits(off, ln,
- edma_cc[j]->edma_unused);
- }
- }
-
- /* Set the reserved slots in inuse list */
- rsv_slots = info[j]->rsv->rsv_slots;
- if (rsv_slots) {
- for (i = 0; rsv_slots[i][0] != -1; i++) {
- off = rsv_slots[i][0];
- ln = rsv_slots[i][1];
- set_bits(off, ln,
- edma_cc[j]->edma_inuse);
- }
- }
- }
-
- sprintf(irq_name, "edma%d", j);
- irq[j] = platform_get_irq_byname(pdev, irq_name);
- edma_cc[j]->irq_res_start = irq[j];
- status = request_irq(irq[j], dma_irq_handler, 0, "edma",
- &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
- irq[j], status);
- goto fail;
- }
-
- sprintf(irq_name, "edma%d_err", j);
- err_irq[j] = platform_get_irq_byname(pdev, irq_name);
- edma_cc[j]->irq_res_end = err_irq[j];
- status = request_irq(err_irq[j], dma_ccerr_handler, 0,
- "edma_error", &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
- err_irq[j], status);
- goto fail;
- }
-
- for (i = 0; i < edma_cc[j]->num_channels; i++)
- map_dmach_queue(j, i, info[j]->default_queue);
-
- queue_tc_mapping = info[j]->queue_tc_mapping;
- queue_priority_mapping = info[j]->queue_priority_mapping;
-
- /* Event queue to TC mapping */
- for (i = 0; queue_tc_mapping[i][0] != -1; i++)
- map_queue_tc(j, queue_tc_mapping[i][0],
- queue_tc_mapping[i][1]);
-
- /* Event queue priority mapping */
- for (i = 0; queue_priority_mapping[i][0] != -1; i++)
- assign_priority_to_queue(j,
- queue_priority_mapping[i][0],
- queue_priority_mapping[i][1]);
-
- /* Map the channel to param entry if channel mapping logic
- * exist
- */
- if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST)
- map_dmach_param(j);
-
- for (i = 0; i < info[j]->n_region; i++) {
- edma_write_array2(j, EDMA_DRAE, i, 0, 0x0);
- edma_write_array2(j, EDMA_DRAE, i, 1, 0x0);
- edma_write_array(j, EDMA_QRAE, i, 0x0);
- }
- arch_num_cc++;
- }
-
- if (tc_errs_handled) {
- status = request_irq(IRQ_TCERRINT0, dma_tc0err_handler, 0,
- "edma_tc0", &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
- IRQ_TCERRINT0, status);
- return status;
- }
- status = request_irq(IRQ_TCERRINT, dma_tc1err_handler, 0,
- "edma_tc1", &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d --> %d\n",
- IRQ_TCERRINT, status);
- return status;
- }
- }
-
- return 0;
-
-fail:
- for (i = 0; i < EDMA_MAX_CC; i++) {
- if (err_irq[i])
- free_irq(err_irq[i], &pdev->dev);
- if (irq[i])
- free_irq(irq[i], &pdev->dev);
- }
-fail1:
- for (i = 0; i < EDMA_MAX_CC; i++) {
- if (r[i])
- release_mem_region(r[i]->start, len[i]);
- if (edmacc_regs_base[i])
- iounmap(edmacc_regs_base[i]);
- kfree(edma_cc[i]);
- }
- return status;
-}
-
-
-static struct platform_driver edma_driver = {
- .driver.name = "edma",
-};
-
-static int __init edma_init(void)
-{
- return platform_driver_probe(&edma_driver, edma_probe);
-}
-arch_initcall(edma_init);
-
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