@@ -971,6 +971,7 @@ config ARCH_DAVINCI
select GENERIC_ALLOCATOR
select GENERIC_IRQ_CHIP
select ARCH_HAS_HOLES_MEMORYMODEL
+ select TI_PRIV_EDMA
help
Support for TI's DaVinci platform.
@@ -40,3 +40,6 @@ config SHARP_PARAM
config SHARP_SCOOP
bool
+
+config TI_PRIV_EDMA
+ bool
@@ -13,3 +13,4 @@ obj-$(CONFIG_SHARP_PARAM) += sharpsl_param.o
obj-$(CONFIG_SHARP_SCOOP) += scoop.o
obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o
obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
+obj-$(CONFIG_TI_PRIV_EDMA) += edma.o
new file mode 100644
@@ -0,0 +1,1588 @@
+/*
+ * 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 <asm/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 (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);
+
new file mode 100644
@@ -0,0 +1,267 @@
+/*
+ * TI DAVINCI dma definitions
+ *
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * This EDMA3 programming framework exposes two basic kinds of resource:
+ *
+ * Channel Triggers transfers, usually from a hardware event but
+ * also manually or by "chaining" from DMA completions.
+ * Each channel is coupled to a Parameter RAM (PaRAM) slot.
+ *
+ * Slot Each PaRAM slot holds a DMA transfer descriptor (PaRAM
+ * "set"), source and destination addresses, a link to a
+ * next PaRAM slot (if any), options for the transfer, and
+ * instructions for updating those addresses. There are
+ * more than twice as many slots as event channels.
+ *
+ * Each PaRAM set describes a sequence of transfers, either for one large
+ * buffer or for several discontiguous smaller buffers. An EDMA transfer
+ * is driven only from a channel, which performs the transfers specified
+ * in its PaRAM slot until there are no more transfers. When that last
+ * transfer completes, the "link" field may be used to reload the channel's
+ * PaRAM slot with a new transfer descriptor.
+ *
+ * The EDMA Channel Controller (CC) maps requests from channels into physical
+ * Transfer Controller (TC) requests when the channel triggers (by hardware
+ * or software events, or by chaining). The two physical DMA channels provided
+ * by the TCs are thus shared by many logical channels.
+ *
+ * DaVinci hardware also has a "QDMA" mechanism which is not currently
+ * supported through this interface. (DSP firmware uses it though.)
+ */
+
+#ifndef EDMA_H_
+#define EDMA_H_
+
+/* PaRAM slots are laid out like this */
+struct edmacc_param {
+ unsigned int opt;
+ unsigned int src;
+ unsigned int a_b_cnt;
+ unsigned int dst;
+ unsigned int src_dst_bidx;
+ unsigned int link_bcntrld;
+ unsigned int src_dst_cidx;
+ unsigned int ccnt;
+};
+
+#define CCINT0_INTERRUPT 16
+#define CCERRINT_INTERRUPT 17
+#define TCERRINT0_INTERRUPT 18
+#define TCERRINT1_INTERRUPT 19
+
+/* fields in edmacc_param.opt */
+#define SAM BIT(0)
+#define DAM BIT(1)
+#define SYNCDIM BIT(2)
+#define STATIC BIT(3)
+#define EDMA_FWID (0x07 << 8)
+#define TCCMODE BIT(11)
+#define EDMA_TCC(t) ((t) << 12)
+#define TCINTEN BIT(20)
+#define ITCINTEN BIT(21)
+#define TCCHEN BIT(22)
+#define ITCCHEN BIT(23)
+
+#define TRWORD (0x7<<2)
+#define PAENTRY (0x1ff<<5)
+
+/* Drivers should avoid using these symbolic names for dm644x
+ * channels, and use platform_device IORESOURCE_DMA resources
+ * instead. (Other DaVinci chips have different peripherals
+ * and thus have different DMA channel mappings.)
+ */
+#define DAVINCI_DMA_MCBSP_TX 2
+#define DAVINCI_DMA_MCBSP_RX 3
+#define DAVINCI_DMA_VPSS_HIST 4
+#define DAVINCI_DMA_VPSS_H3A 5
+#define DAVINCI_DMA_VPSS_PRVU 6
+#define DAVINCI_DMA_VPSS_RSZ 7
+#define DAVINCI_DMA_IMCOP_IMXINT 8
+#define DAVINCI_DMA_IMCOP_VLCDINT 9
+#define DAVINCI_DMA_IMCO_PASQINT 10
+#define DAVINCI_DMA_IMCOP_DSQINT 11
+#define DAVINCI_DMA_SPI_SPIX 16
+#define DAVINCI_DMA_SPI_SPIR 17
+#define DAVINCI_DMA_UART0_URXEVT0 18
+#define DAVINCI_DMA_UART0_UTXEVT0 19
+#define DAVINCI_DMA_UART1_URXEVT1 20
+#define DAVINCI_DMA_UART1_UTXEVT1 21
+#define DAVINCI_DMA_UART2_URXEVT2 22
+#define DAVINCI_DMA_UART2_UTXEVT2 23
+#define DAVINCI_DMA_MEMSTK_MSEVT 24
+#define DAVINCI_DMA_MMCRXEVT 26
+#define DAVINCI_DMA_MMCTXEVT 27
+#define DAVINCI_DMA_I2C_ICREVT 28
+#define DAVINCI_DMA_I2C_ICXEVT 29
+#define DAVINCI_DMA_GPIO_GPINT0 32
+#define DAVINCI_DMA_GPIO_GPINT1 33
+#define DAVINCI_DMA_GPIO_GPINT2 34
+#define DAVINCI_DMA_GPIO_GPINT3 35
+#define DAVINCI_DMA_GPIO_GPINT4 36
+#define DAVINCI_DMA_GPIO_GPINT5 37
+#define DAVINCI_DMA_GPIO_GPINT6 38
+#define DAVINCI_DMA_GPIO_GPINT7 39
+#define DAVINCI_DMA_GPIO_GPBNKINT0 40
+#define DAVINCI_DMA_GPIO_GPBNKINT1 41
+#define DAVINCI_DMA_GPIO_GPBNKINT2 42
+#define DAVINCI_DMA_GPIO_GPBNKINT3 43
+#define DAVINCI_DMA_GPIO_GPBNKINT4 44
+#define DAVINCI_DMA_TIMER0_TINT0 48
+#define DAVINCI_DMA_TIMER1_TINT1 49
+#define DAVINCI_DMA_TIMER2_TINT2 50
+#define DAVINCI_DMA_TIMER3_TINT3 51
+#define DAVINCI_DMA_PWM0 52
+#define DAVINCI_DMA_PWM1 53
+#define DAVINCI_DMA_PWM2 54
+
+/* DA830 specific EDMA3 information */
+#define EDMA_DA830_NUM_DMACH 32
+#define EDMA_DA830_NUM_TCC 32
+#define EDMA_DA830_NUM_PARAMENTRY 128
+#define EDMA_DA830_NUM_EVQUE 2
+#define EDMA_DA830_NUM_TC 2
+#define EDMA_DA830_CHMAP_EXIST 0
+#define EDMA_DA830_NUM_REGIONS 4
+#define DA830_DMACH2EVENT_MAP0 0x000FC03Fu
+#define DA830_DMACH2EVENT_MAP1 0x00000000u
+#define DA830_EDMA_ARM_OWN 0x30FFCCFFu
+
+/*ch_status paramater of callback function possible values*/
+#define DMA_COMPLETE 1
+#define DMA_CC_ERROR 2
+#define DMA_TC1_ERROR 3
+#define DMA_TC2_ERROR 4
+
+enum address_mode {
+ INCR = 0,
+ FIFO = 1
+};
+
+enum fifo_width {
+ W8BIT = 0,
+ W16BIT = 1,
+ W32BIT = 2,
+ W64BIT = 3,
+ W128BIT = 4,
+ W256BIT = 5
+};
+
+enum dma_event_q {
+ EVENTQ_0 = 0,
+ EVENTQ_1 = 1,
+ EVENTQ_2 = 2,
+ EVENTQ_3 = 3,
+ EVENTQ_DEFAULT = -1
+};
+
+enum sync_dimension {
+ ASYNC = 0,
+ ABSYNC = 1
+};
+
+#define EDMA_CTLR_CHAN(ctlr, chan) (((ctlr) << 16) | (chan))
+#define EDMA_CTLR(i) ((i) >> 16)
+#define EDMA_CHAN_SLOT(i) ((i) & 0xffff)
+
+#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */
+#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */
+#define EDMA_CONT_PARAMS_ANY 1001
+#define EDMA_CONT_PARAMS_FIXED_EXACT 1002
+#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003
+
+#define EDMA_MAX_CC 2
+
+/* alloc/free DMA channels and their dedicated parameter RAM slots */
+int edma_alloc_channel(int channel,
+ void (*callback)(unsigned channel, u16 ch_status, void *data),
+ void *data, enum dma_event_q);
+void edma_free_channel(unsigned channel);
+
+/* alloc/free parameter RAM slots */
+int edma_alloc_slot(unsigned ctlr, int slot);
+void edma_free_slot(unsigned slot);
+
+/* alloc/free a set of contiguous parameter RAM slots */
+int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count);
+int edma_free_cont_slots(unsigned slot, int count);
+
+/* calls that operate on part of a parameter RAM slot */
+void edma_set_src(unsigned slot, dma_addr_t src_port,
+ enum address_mode mode, enum fifo_width);
+void edma_set_dest(unsigned slot, dma_addr_t dest_port,
+ enum address_mode mode, enum fifo_width);
+void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst);
+void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx);
+void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
+void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
+ u16 bcnt_rld, enum sync_dimension sync_mode);
+void edma_link(unsigned from, unsigned to);
+void edma_unlink(unsigned from);
+
+/* calls that operate on an entire parameter RAM slot */
+void edma_write_slot(unsigned slot, const struct edmacc_param *params);
+void edma_read_slot(unsigned slot, struct edmacc_param *params);
+
+/* channel control operations */
+int edma_start(unsigned channel);
+void edma_stop(unsigned channel);
+void edma_clean_channel(unsigned channel);
+void edma_clear_event(unsigned channel);
+void edma_pause(unsigned channel);
+void edma_resume(unsigned channel);
+
+struct edma_rsv_info {
+
+ const s16 (*rsv_chans)[2];
+ const s16 (*rsv_slots)[2];
+};
+
+/* platform_data for EDMA driver */
+struct edma_soc_info {
+
+ /* how many dma resources of each type */
+ unsigned n_channel;
+ unsigned n_region;
+ unsigned n_slot;
+ unsigned n_tc;
+ unsigned n_cc;
+ /*
+ * Default queue is expected to be a low-priority queue.
+ * This way, long transfers on the default queue started
+ * by the codec engine will not cause audio defects.
+ */
+ enum dma_event_q default_queue;
+
+ /* Resource reservation for other cores */
+ struct edma_rsv_info *rsv;
+
+ const s8 (*queue_tc_mapping)[2];
+ const s8 (*queue_priority_mapping)[2];
+};
+
+#endif
@@ -5,7 +5,7 @@
# Common objects
obj-y := time.o clock.o serial.o psc.o \
- dma.o usb.o common.o sram.o aemif.o
+ usb.o common.o sram.o aemif.o
obj-$(CONFIG_DAVINCI_MUX) += mux.o
@@ -14,12 +14,13 @@
#include <linux/dma-mapping.h>
#include <linux/io.h>
+#include <asm/mach/edma.h>
+
#include <mach/hardware.h>
#include <mach/i2c.h>
#include <mach/irqs.h>
#include <mach/cputype.h>
#include <mach/mux.h>
-#include <mach/edma.h>
#include <mach/mmc.h>
#include <mach/time.h>
@@ -16,10 +16,10 @@
#include <linux/spi/spi.h>
+#include <asm/mach/edma.h>
#include <asm/mach/map.h>
#include <mach/cputype.h>
-#include <mach/edma.h>
#include <mach/psc.h>
#include <mach/mux.h>
#include <mach/irqs.h>
@@ -19,10 +19,10 @@
#include <linux/dma-mapping.h>
#include <linux/spi/spi.h>
+#include <asm/mach/edma.h>
#include <asm/mach/map.h>
#include <mach/cputype.h>
-#include <mach/edma.h>
#include <mach/psc.h>
#include <mach/mux.h>
#include <mach/irqs.h>
@@ -13,10 +13,10 @@
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
+#include <asm/mach/edma.h>
#include <asm/mach/map.h>
#include <mach/cputype.h>
-#include <mach/edma.h>
#include <mach/irqs.h>
#include <mach/psc.h>
#include <mach/mux.h>
@@ -14,10 +14,10 @@
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
+#include <asm/mach/edma.h>
#include <asm/mach/map.h>
#include <mach/cputype.h>
-#include <mach/edma.h>
#include <mach/irqs.h>
#include <mach/psc.h>
#include <mach/mux.h>
deleted file mode 100644
@@ -1,1588 +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 (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);
-
@@ -4,8 +4,8 @@
#ifndef __ASM_ARCH_DAVINCI_ASP_H
#define __ASM_ARCH_DAVINCI_ASP_H
+#include <asm/mach/edma.h>
#include <mach/irqs.h>
-#include <mach/edma.h>
/* Bases of dm644x and dm355 register banks */
#define DAVINCI_ASP0_BASE 0x01E02000
@@ -17,8 +17,9 @@
#include <linux/davinci_emac.h>
#include <linux/spi/spi.h>
+#include <asm/mach/edma.h>
+
#include <mach/serial.h>
-#include <mach/edma.h>
#include <mach/i2c.h>
#include <mach/asp.h>
#include <mach/mmc.h>
deleted file mode 100644
@@ -1,267 +0,0 @@
-/*
- * TI DAVINCI dma definitions
- *
- * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.
- *
- */
-
-/*
- * This EDMA3 programming framework exposes two basic kinds of resource:
- *
- * Channel Triggers transfers, usually from a hardware event but
- * also manually or by "chaining" from DMA completions.
- * Each channel is coupled to a Parameter RAM (PaRAM) slot.
- *
- * Slot Each PaRAM slot holds a DMA transfer descriptor (PaRAM
- * "set"), source and destination addresses, a link to a
- * next PaRAM slot (if any), options for the transfer, and
- * instructions for updating those addresses. There are
- * more than twice as many slots as event channels.
- *
- * Each PaRAM set describes a sequence of transfers, either for one large
- * buffer or for several discontiguous smaller buffers. An EDMA transfer
- * is driven only from a channel, which performs the transfers specified
- * in its PaRAM slot until there are no more transfers. When that last
- * transfer completes, the "link" field may be used to reload the channel's
- * PaRAM slot with a new transfer descriptor.
- *
- * The EDMA Channel Controller (CC) maps requests from channels into physical
- * Transfer Controller (TC) requests when the channel triggers (by hardware
- * or software events, or by chaining). The two physical DMA channels provided
- * by the TCs are thus shared by many logical channels.
- *
- * DaVinci hardware also has a "QDMA" mechanism which is not currently
- * supported through this interface. (DSP firmware uses it though.)
- */
-
-#ifndef EDMA_H_
-#define EDMA_H_
-
-/* PaRAM slots are laid out like this */
-struct edmacc_param {
- unsigned int opt;
- unsigned int src;
- unsigned int a_b_cnt;
- unsigned int dst;
- unsigned int src_dst_bidx;
- unsigned int link_bcntrld;
- unsigned int src_dst_cidx;
- unsigned int ccnt;
-};
-
-#define CCINT0_INTERRUPT 16
-#define CCERRINT_INTERRUPT 17
-#define TCERRINT0_INTERRUPT 18
-#define TCERRINT1_INTERRUPT 19
-
-/* fields in edmacc_param.opt */
-#define SAM BIT(0)
-#define DAM BIT(1)
-#define SYNCDIM BIT(2)
-#define STATIC BIT(3)
-#define EDMA_FWID (0x07 << 8)
-#define TCCMODE BIT(11)
-#define EDMA_TCC(t) ((t) << 12)
-#define TCINTEN BIT(20)
-#define ITCINTEN BIT(21)
-#define TCCHEN BIT(22)
-#define ITCCHEN BIT(23)
-
-#define TRWORD (0x7<<2)
-#define PAENTRY (0x1ff<<5)
-
-/* Drivers should avoid using these symbolic names for dm644x
- * channels, and use platform_device IORESOURCE_DMA resources
- * instead. (Other DaVinci chips have different peripherals
- * and thus have different DMA channel mappings.)
- */
-#define DAVINCI_DMA_MCBSP_TX 2
-#define DAVINCI_DMA_MCBSP_RX 3
-#define DAVINCI_DMA_VPSS_HIST 4
-#define DAVINCI_DMA_VPSS_H3A 5
-#define DAVINCI_DMA_VPSS_PRVU 6
-#define DAVINCI_DMA_VPSS_RSZ 7
-#define DAVINCI_DMA_IMCOP_IMXINT 8
-#define DAVINCI_DMA_IMCOP_VLCDINT 9
-#define DAVINCI_DMA_IMCO_PASQINT 10
-#define DAVINCI_DMA_IMCOP_DSQINT 11
-#define DAVINCI_DMA_SPI_SPIX 16
-#define DAVINCI_DMA_SPI_SPIR 17
-#define DAVINCI_DMA_UART0_URXEVT0 18
-#define DAVINCI_DMA_UART0_UTXEVT0 19
-#define DAVINCI_DMA_UART1_URXEVT1 20
-#define DAVINCI_DMA_UART1_UTXEVT1 21
-#define DAVINCI_DMA_UART2_URXEVT2 22
-#define DAVINCI_DMA_UART2_UTXEVT2 23
-#define DAVINCI_DMA_MEMSTK_MSEVT 24
-#define DAVINCI_DMA_MMCRXEVT 26
-#define DAVINCI_DMA_MMCTXEVT 27
-#define DAVINCI_DMA_I2C_ICREVT 28
-#define DAVINCI_DMA_I2C_ICXEVT 29
-#define DAVINCI_DMA_GPIO_GPINT0 32
-#define DAVINCI_DMA_GPIO_GPINT1 33
-#define DAVINCI_DMA_GPIO_GPINT2 34
-#define DAVINCI_DMA_GPIO_GPINT3 35
-#define DAVINCI_DMA_GPIO_GPINT4 36
-#define DAVINCI_DMA_GPIO_GPINT5 37
-#define DAVINCI_DMA_GPIO_GPINT6 38
-#define DAVINCI_DMA_GPIO_GPINT7 39
-#define DAVINCI_DMA_GPIO_GPBNKINT0 40
-#define DAVINCI_DMA_GPIO_GPBNKINT1 41
-#define DAVINCI_DMA_GPIO_GPBNKINT2 42
-#define DAVINCI_DMA_GPIO_GPBNKINT3 43
-#define DAVINCI_DMA_GPIO_GPBNKINT4 44
-#define DAVINCI_DMA_TIMER0_TINT0 48
-#define DAVINCI_DMA_TIMER1_TINT1 49
-#define DAVINCI_DMA_TIMER2_TINT2 50
-#define DAVINCI_DMA_TIMER3_TINT3 51
-#define DAVINCI_DMA_PWM0 52
-#define DAVINCI_DMA_PWM1 53
-#define DAVINCI_DMA_PWM2 54
-
-/* DA830 specific EDMA3 information */
-#define EDMA_DA830_NUM_DMACH 32
-#define EDMA_DA830_NUM_TCC 32
-#define EDMA_DA830_NUM_PARAMENTRY 128
-#define EDMA_DA830_NUM_EVQUE 2
-#define EDMA_DA830_NUM_TC 2
-#define EDMA_DA830_CHMAP_EXIST 0
-#define EDMA_DA830_NUM_REGIONS 4
-#define DA830_DMACH2EVENT_MAP0 0x000FC03Fu
-#define DA830_DMACH2EVENT_MAP1 0x00000000u
-#define DA830_EDMA_ARM_OWN 0x30FFCCFFu
-
-/*ch_status paramater of callback function possible values*/
-#define DMA_COMPLETE 1
-#define DMA_CC_ERROR 2
-#define DMA_TC1_ERROR 3
-#define DMA_TC2_ERROR 4
-
-enum address_mode {
- INCR = 0,
- FIFO = 1
-};
-
-enum fifo_width {
- W8BIT = 0,
- W16BIT = 1,
- W32BIT = 2,
- W64BIT = 3,
- W128BIT = 4,
- W256BIT = 5
-};
-
-enum dma_event_q {
- EVENTQ_0 = 0,
- EVENTQ_1 = 1,
- EVENTQ_2 = 2,
- EVENTQ_3 = 3,
- EVENTQ_DEFAULT = -1
-};
-
-enum sync_dimension {
- ASYNC = 0,
- ABSYNC = 1
-};
-
-#define EDMA_CTLR_CHAN(ctlr, chan) (((ctlr) << 16) | (chan))
-#define EDMA_CTLR(i) ((i) >> 16)
-#define EDMA_CHAN_SLOT(i) ((i) & 0xffff)
-
-#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */
-#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */
-#define EDMA_CONT_PARAMS_ANY 1001
-#define EDMA_CONT_PARAMS_FIXED_EXACT 1002
-#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003
-
-#define EDMA_MAX_CC 2
-
-/* alloc/free DMA channels and their dedicated parameter RAM slots */
-int edma_alloc_channel(int channel,
- void (*callback)(unsigned channel, u16 ch_status, void *data),
- void *data, enum dma_event_q);
-void edma_free_channel(unsigned channel);
-
-/* alloc/free parameter RAM slots */
-int edma_alloc_slot(unsigned ctlr, int slot);
-void edma_free_slot(unsigned slot);
-
-/* alloc/free a set of contiguous parameter RAM slots */
-int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count);
-int edma_free_cont_slots(unsigned slot, int count);
-
-/* calls that operate on part of a parameter RAM slot */
-void edma_set_src(unsigned slot, dma_addr_t src_port,
- enum address_mode mode, enum fifo_width);
-void edma_set_dest(unsigned slot, dma_addr_t dest_port,
- enum address_mode mode, enum fifo_width);
-void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst);
-void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx);
-void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
-void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
- u16 bcnt_rld, enum sync_dimension sync_mode);
-void edma_link(unsigned from, unsigned to);
-void edma_unlink(unsigned from);
-
-/* calls that operate on an entire parameter RAM slot */
-void edma_write_slot(unsigned slot, const struct edmacc_param *params);
-void edma_read_slot(unsigned slot, struct edmacc_param *params);
-
-/* channel control operations */
-int edma_start(unsigned channel);
-void edma_stop(unsigned channel);
-void edma_clean_channel(unsigned channel);
-void edma_clear_event(unsigned channel);
-void edma_pause(unsigned channel);
-void edma_resume(unsigned channel);
-
-struct edma_rsv_info {
-
- const s16 (*rsv_chans)[2];
- const s16 (*rsv_slots)[2];
-};
-
-/* platform_data for EDMA driver */
-struct edma_soc_info {
-
- /* how many dma resources of each type */
- unsigned n_channel;
- unsigned n_region;
- unsigned n_slot;
- unsigned n_tc;
- unsigned n_cc;
- /*
- * Default queue is expected to be a low-priority queue.
- * This way, long transfers on the default queue started
- * by the codec engine will not cause audio defects.
- */
- enum dma_event_q default_queue;
-
- /* Resource reservation for other cores */
- struct edma_rsv_info *rsv;
-
- const s8 (*queue_tc_mapping)[2];
- const s8 (*queue_priority_mapping)[2];
-};
-
-#endif
@@ -19,7 +19,7 @@
#ifndef __ARCH_ARM_DAVINCI_SPI_H
#define __ARCH_ARM_DAVINCI_SPI_H
-#include <mach/edma.h>
+#include <asm/mach/edma.h>
#define SPI_INTERN_CS 0xFF
@@ -28,6 +28,7 @@ config ARCH_OMAP2PLUS
select OMAP_DM_TIMER
select USE_OF
select PROC_DEVICETREE if PROC_FS
+ select TI_PRIV_EDMA
help
"Systems based on OMAP2, OMAP3, OMAP4 or OMAP5"
Move mach-davinci/dma.c to common/edma.c so it can be used by OMAP (specifically AM33xx atm) as well. This just moves the private EDMA API but does not support OMAP. Signed-off-by: Matt Porter <mporter@ti.com> --- arch/arm/Kconfig | 1 + arch/arm/common/Kconfig | 3 + arch/arm/common/Makefile | 1 + arch/arm/common/edma.c | 1588 ++++++++++++++++++++++++++++ arch/arm/include/asm/mach/edma.h | 267 +++++ arch/arm/mach-davinci/Makefile | 2 +- arch/arm/mach-davinci/devices.c | 3 +- arch/arm/mach-davinci/dm355.c | 2 +- arch/arm/mach-davinci/dm365.c | 2 +- arch/arm/mach-davinci/dm644x.c | 2 +- arch/arm/mach-davinci/dm646x.c | 2 +- arch/arm/mach-davinci/dma.c | 1588 ---------------------------- arch/arm/mach-davinci/include/mach/asp.h | 2 +- arch/arm/mach-davinci/include/mach/da8xx.h | 3 +- arch/arm/mach-davinci/include/mach/edma.h | 267 ----- arch/arm/mach-davinci/include/mach/spi.h | 2 +- arch/arm/plat-omap/Kconfig | 1 + 17 files changed, 1872 insertions(+), 1864 deletions(-) create mode 100644 arch/arm/common/edma.c create mode 100644 arch/arm/include/asm/mach/edma.h delete mode 100644 arch/arm/mach-davinci/dma.c delete mode 100644 arch/arm/mach-davinci/include/mach/edma.h