* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/compiler.h>
#include <linux/io.h>
+#include <linux/slab.h>
-#include <mach/cputype.h>
-#include <mach/memory.h>
-#include <mach/hardware.h>
-#include <mach/irqs.h>
#include <mach/edma.h>
-#include <mach/mux.h>
-
/* Offsets matching "struct edmacc_param" */
#define PARM_OPT 0x00
#define EDMA_SHADOW0 0x2000 /* 4 regions shadowing global channels */
#define EDMA_PARM 0x4000 /* 128 param entries */
-#define DAVINCI_DMA_3PCC_BASE 0x01C00000
-
#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
-#define EDMA_MAX_EVQUE 2 /* FIXME too small */
+#define EDMA_MAX_CC 2
/*****************************************************************************/
-static void __iomem *edmacc_regs_base;
+static void __iomem *edmacc_regs_base[EDMA_MAX_CC];
-static inline unsigned int edma_read(int offset)
+static inline unsigned int edma_read(unsigned ctlr, int offset)
{
- return (unsigned int)__raw_readl(edmacc_regs_base + offset);
+ return (unsigned int)__raw_readl(edmacc_regs_base[ctlr] + offset);
}
-static inline void edma_write(int offset, int val)
+static inline void edma_write(unsigned ctlr, int offset, int val)
{
- __raw_writel(val, edmacc_regs_base + offset);
+ __raw_writel(val, edmacc_regs_base[ctlr] + offset);
}
-static inline void edma_modify(int offset, unsigned and, unsigned or)
+static inline void edma_modify(unsigned ctlr, int offset, unsigned and,
+ unsigned or)
{
- unsigned val = edma_read(offset);
+ unsigned val = edma_read(ctlr, offset);
val &= and;
val |= or;
- edma_write(offset, val);
+ edma_write(ctlr, offset, val);
}
-static inline void edma_and(int offset, unsigned and)
+static inline void edma_and(unsigned ctlr, int offset, unsigned and)
{
- unsigned val = edma_read(offset);
+ unsigned val = edma_read(ctlr, offset);
val &= and;
- edma_write(offset, val);
+ edma_write(ctlr, offset, val);
}
-static inline void edma_or(int offset, unsigned or)
+static inline void edma_or(unsigned ctlr, int offset, unsigned or)
{
- unsigned val = edma_read(offset);
+ unsigned val = edma_read(ctlr, offset);
val |= or;
- edma_write(offset, val);
+ edma_write(ctlr, offset, val);
}
-static inline unsigned int edma_read_array(int offset, int i)
+static inline unsigned int edma_read_array(unsigned ctlr, int offset, int i)
{
- return edma_read(offset + (i << 2));
+ return edma_read(ctlr, offset + (i << 2));
}
-static inline void edma_write_array(int offset, int i, unsigned val)
+static inline void edma_write_array(unsigned ctlr, int offset, int i,
+ unsigned val)
{
- edma_write(offset + (i << 2), val);
+ edma_write(ctlr, offset + (i << 2), val);
}
-static inline void edma_modify_array(int offset, int i,
+static inline void edma_modify_array(unsigned ctlr, int offset, int i,
unsigned and, unsigned or)
{
- edma_modify(offset + (i << 2), and, or);
+ edma_modify(ctlr, offset + (i << 2), and, or);
}
-static inline void edma_or_array(int offset, int i, unsigned or)
+static inline void edma_or_array(unsigned ctlr, int offset, int i, unsigned or)
{
- edma_or(offset + (i << 2), or);
+ edma_or(ctlr, offset + (i << 2), or);
}
-static inline void edma_or_array2(int offset, int i, int j, unsigned or)
+static inline void edma_or_array2(unsigned ctlr, int offset, int i, int j,
+ unsigned or)
{
- edma_or(offset + ((i*2 + j) << 2), or);
+ edma_or(ctlr, offset + ((i*2 + j) << 2), or);
}
-static inline void edma_write_array2(int offset, int i, int j, unsigned val)
+static inline void edma_write_array2(unsigned ctlr, int offset, int i, int j,
+ unsigned val)
{
- edma_write(offset + ((i*2 + j) << 2), val);
+ edma_write(ctlr, offset + ((i*2 + j) << 2), val);
}
-static inline unsigned int edma_shadow0_read(int offset)
+static inline unsigned int edma_shadow0_read(unsigned ctlr, int offset)
{
- return edma_read(EDMA_SHADOW0 + offset);
+ return edma_read(ctlr, EDMA_SHADOW0 + offset);
}
-static inline unsigned int edma_shadow0_read_array(int offset, int i)
+static inline unsigned int edma_shadow0_read_array(unsigned ctlr, int offset,
+ int i)
{
- return edma_read(EDMA_SHADOW0 + offset + (i << 2));
+ return edma_read(ctlr, EDMA_SHADOW0 + offset + (i << 2));
}
-static inline void edma_shadow0_write(int offset, unsigned val)
+static inline void edma_shadow0_write(unsigned ctlr, int offset, unsigned val)
{
- edma_write(EDMA_SHADOW0 + offset, val);
+ edma_write(ctlr, EDMA_SHADOW0 + offset, val);
}
-static inline void edma_shadow0_write_array(int offset, int i, unsigned val)
+static inline void edma_shadow0_write_array(unsigned ctlr, int offset, int i,
+ unsigned val)
{
- edma_write(EDMA_SHADOW0 + offset + (i << 2), val);
+ edma_write(ctlr, EDMA_SHADOW0 + offset + (i << 2), val);
}
-static inline unsigned int edma_parm_read(int offset, int param_no)
+static inline unsigned int edma_parm_read(unsigned ctlr, int offset,
+ int param_no)
{
- return edma_read(EDMA_PARM + offset + (param_no << 5));
+ return edma_read(ctlr, EDMA_PARM + offset + (param_no << 5));
}
-static inline void edma_parm_write(int offset, int param_no, unsigned val)
+static inline void edma_parm_write(unsigned ctlr, int offset, int param_no,
+ unsigned val)
{
- edma_write(EDMA_PARM + offset + (param_no << 5), val);
+ edma_write(ctlr, EDMA_PARM + offset + (param_no << 5), val);
}
-static inline void edma_parm_modify(int offset, int param_no,
+static inline void edma_parm_modify(unsigned ctlr, int offset, int param_no,
unsigned and, unsigned or)
{
- edma_modify(EDMA_PARM + offset + (param_no << 5), and, or);
+ edma_modify(ctlr, EDMA_PARM + offset + (param_no << 5), and, or);
}
-static inline void edma_parm_and(int offset, int param_no, unsigned and)
+static inline void edma_parm_and(unsigned ctlr, int offset, int param_no,
+ unsigned and)
{
- edma_and(EDMA_PARM + offset + (param_no << 5), and);
+ edma_and(ctlr, EDMA_PARM + offset + (param_no << 5), and);
}
-static inline void edma_parm_or(int offset, int param_no, unsigned or)
+static inline void edma_parm_or(unsigned ctlr, int offset, int param_no,
+ unsigned or)
{
- edma_or(EDMA_PARM + offset + (param_no << 5), or);
+ edma_or(ctlr, EDMA_PARM + offset + (param_no << 5), or);
}
/*****************************************************************************/
/* actual number of DMA channels and slots on this silicon */
-static unsigned num_channels;
-static unsigned num_slots;
+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);
-static struct dma_interrupt_data {
- void (*callback)(unsigned channel, unsigned short ch_status,
- void *data);
- void *data;
-} intr_data[EDMA_MAX_DMACH];
+ /* 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);
-/* The edma_inuse bit for each PaRAM slot is clear unless the
- * channel is in use ... by ARM or DSP, for QDMA, or whatever.
- */
-static DECLARE_BITMAP(edma_inuse, EDMA_MAX_PARAMENTRY);
+ unsigned irq_res_start;
+ unsigned irq_res_end;
-/* The edma_noevent bit for each channel is clear unless
- * it doesn't trigger DMA events on this platform. It uses a
- * bit of SOC-specific initialization code.
- */
-static DECLARE_BITMAP(edma_noevent, EDMA_MAX_DMACH);
+ 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_info[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 = {
.ccnt = 1,
};
-static const int __initconst
-queue_tc_mapping[EDMA_MAX_EVQUE + 1][2] = {
-/* {event queue no, TC no} */
- {0, 0},
- {1, 1},
- {-1, -1}
-};
-
-static const int __initconst
-queue_priority_mapping[EDMA_MAX_EVQUE + 1][2] = {
- /* {event queue no, Priority} */
- {0, 3},
- {1, 7},
- {-1, -1}
-};
-
/*****************************************************************************/
-static void map_dmach_queue(unsigned ch_no, enum dma_event_q queue_no)
+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 = EVENTQ_1;
+ queue_no = edma_info[ctlr]->default_queue;
queue_no &= 7;
- edma_modify_array(EDMA_DMAQNUM, (ch_no >> 3),
+ edma_modify_array(ctlr, EDMA_DMAQNUM, (ch_no >> 3),
~(0x7 << bit), queue_no << bit);
}
-static void __init map_queue_tc(int queue_no, int tc_no)
+static void __init map_queue_tc(unsigned ctlr, int queue_no, int tc_no)
{
int bit = queue_no * 4;
- edma_modify(EDMA_QUETCMAP, ~(0x7 << bit), ((tc_no & 0x7) << bit));
+ edma_modify(ctlr, EDMA_QUETCMAP, ~(0x7 << bit), ((tc_no & 0x7) << bit));
}
-static void __init assign_priority_to_queue(int queue_no, int priority)
+static void __init assign_priority_to_queue(unsigned ctlr, int queue_no,
+ int priority)
{
int bit = queue_no * 4;
- edma_modify(EDMA_QUEPRI, ~(0x7 << bit), ((priority & 0x7) << bit));
+ 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
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(SH_IECR, lch >> 5,
+ edma_shadow0_write_array(ctlr, SH_IECR, lch >> 5,
(1 << (lch & 0x1f)));
}
- intr_data[lch].callback = callback;
- intr_data[lch].data = data;
+ edma_info[ctlr]->intr_data[lch].callback = callback;
+ edma_info[ctlr]->intr_data[lch].data = data;
if (callback) {
- edma_shadow0_write_array(SH_ICR, lch >> 5,
+ edma_shadow0_write_array(ctlr, SH_ICR, lch >> 5,
(1 << (lch & 0x1f)));
- edma_shadow0_write_array(SH_IESR, lch >> 5,
+ edma_shadow0_write_array(ctlr, SH_IESR, lch >> 5,
(1 << (lch & 0x1f)));
}
}
+static int irq2ctlr(int irq)
+{
+ if (irq >= edma_info[0]->irq_res_start &&
+ irq <= edma_info[0]->irq_res_end)
+ return 0;
+ else if (irq >= edma_info[1]->irq_res_start &&
+ irq <= edma_info[1]->irq_res_end)
+ return 1;
+
+ return -1;
+}
+
/******************************************************************************
*
* DMA interrupt handler
static irqreturn_t dma_irq_handler(int irq, void *data)
{
int i;
+ unsigned ctlr;
unsigned int cnt = 0;
+ ctlr = irq2ctlr(irq);
+
dev_dbg(data, "dma_irq_handler\n");
- if ((edma_shadow0_read_array(SH_IPR, 0) == 0)
- && (edma_shadow0_read_array(SH_IPR, 1) == 0))
+ if ((edma_shadow0_read_array(ctlr, SH_IPR, 0) == 0)
+ && (edma_shadow0_read_array(ctlr, SH_IPR, 1) == 0))
return IRQ_NONE;
while (1) {
int j;
- if (edma_shadow0_read_array(SH_IPR, 0))
+ if (edma_shadow0_read_array(ctlr, SH_IPR, 0) &
+ edma_shadow0_read_array(ctlr, SH_IER, 0))
j = 0;
- else if (edma_shadow0_read_array(SH_IPR, 1))
+ else if (edma_shadow0_read_array(ctlr, SH_IPR, 1) &
+ edma_shadow0_read_array(ctlr, SH_IER, 1))
j = 1;
else
break;
dev_dbg(data, "IPR%d %08x\n", j,
- edma_shadow0_read_array(SH_IPR, j));
+ edma_shadow0_read_array(ctlr, SH_IPR, j));
for (i = 0; i < 32; i++) {
int k = (j << 5) + i;
- if (edma_shadow0_read_array(SH_IPR, j) & (1 << i)) {
+ if ((edma_shadow0_read_array(ctlr, SH_IPR, j) & BIT(i))
+ && (edma_shadow0_read_array(ctlr,
+ SH_IER, j) & BIT(i))) {
/* Clear the corresponding IPR bits */
- edma_shadow0_write_array(SH_ICR, j, (1 << i));
- if (intr_data[k].callback) {
- intr_data[k].callback(k, DMA_COMPLETE,
- intr_data[k].data);
+ edma_shadow0_write_array(ctlr, SH_ICR, j,
+ (1 << i));
+ if (edma_info[ctlr]->intr_data[k].callback) {
+ edma_info[ctlr]->intr_data[k].callback(
+ k, DMA_COMPLETE,
+ edma_info[ctlr]->intr_data[k].
+ data);
}
}
}
if (cnt > 10)
break;
}
- edma_shadow0_write(SH_IEVAL, 1);
+ edma_shadow0_write(ctlr, SH_IEVAL, 1);
return IRQ_HANDLED;
}
static irqreturn_t dma_ccerr_handler(int irq, void *data)
{
int i;
+ unsigned ctlr;
unsigned int cnt = 0;
+ ctlr = irq2ctlr(irq);
+
dev_dbg(data, "dma_ccerr_handler\n");
- if ((edma_read_array(EDMA_EMR, 0) == 0) &&
- (edma_read_array(EDMA_EMR, 1) == 0) &&
- (edma_read(EDMA_QEMR) == 0) && (edma_read(EDMA_CCERR) == 0))
+ 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(EDMA_EMR, 0))
+ if (edma_read_array(ctlr, EDMA_EMR, 0))
j = 0;
- else if (edma_read_array(EDMA_EMR, 1))
+ 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(EDMA_EMR, j));
+ edma_read_array(ctlr, EDMA_EMR, j));
for (i = 0; i < 32; i++) {
int k = (j << 5) + i;
- if (edma_read_array(EDMA_EMR, j) & (1 << i)) {
+ if (edma_read_array(ctlr, EDMA_EMR, j) &
+ (1 << i)) {
/* Clear the corresponding EMR bits */
- edma_write_array(EDMA_EMCR, j, 1 << i);
+ edma_write_array(ctlr, EDMA_EMCR, j,
+ 1 << i);
/* Clear any SER */
- edma_shadow0_write_array(SH_SECR, j,
- (1 << i));
- if (intr_data[k].callback) {
- intr_data[k].callback(k,
- DMA_CC_ERROR,
- intr_data
- [k].data);
+ edma_shadow0_write_array(ctlr, SH_SECR,
+ j, (1 << i));
+ if (edma_info[ctlr]->intr_data[k].
+ callback) {
+ edma_info[ctlr]->intr_data[k].
+ callback(k,
+ DMA_CC_ERROR,
+ edma_info[ctlr]->intr_data
+ [k].data);
}
}
}
- } else if (edma_read(EDMA_QEMR)) {
+ } else if (edma_read(ctlr, EDMA_QEMR)) {
dev_dbg(data, "QEMR %02x\n",
- edma_read(EDMA_QEMR));
+ edma_read(ctlr, EDMA_QEMR));
for (i = 0; i < 8; i++) {
- if (edma_read(EDMA_QEMR) & (1 << i)) {
+ if (edma_read(ctlr, EDMA_QEMR) & (1 << i)) {
/* Clear the corresponding IPR bits */
- edma_write(EDMA_QEMCR, 1 << i);
- edma_shadow0_write(SH_QSECR, (1 << i));
+ edma_write(ctlr, EDMA_QEMCR, 1 << i);
+ edma_shadow0_write(ctlr, SH_QSECR,
+ (1 << i));
/* NOTE: not reported!! */
}
}
- } else if (edma_read(EDMA_CCERR)) {
+ } else if (edma_read(ctlr, EDMA_CCERR)) {
dev_dbg(data, "CCERR %08x\n",
- edma_read(EDMA_CCERR));
+ 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(EDMA_CCERR) & (1 << i)) {
+ if (edma_read(ctlr, EDMA_CCERR) & (1 << i)) {
/* Clear the corresponding IPR bits */
- edma_write(EDMA_CCERRCLR, 1 << i);
+ edma_write(ctlr, EDMA_CCERRCLR, 1 << i);
/* NOTE: not reported!! */
}
}
}
- if ((edma_read_array(EDMA_EMR, 0) == 0)
- && (edma_read_array(EDMA_EMR, 1) == 0)
- && (edma_read(EDMA_QEMR) == 0)
- && (edma_read(EDMA_CCERR) == 0)) {
+ 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(EDMA_EEVAL, 1);
+ edma_write(ctlr, EDMA_EEVAL, 1);
return IRQ_HANDLED;
}
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_info[ctlr]->num_slots; ++i) {
+ j = EDMA_CHAN_SLOT(i);
+ if (!test_and_set_bit(j, edma_info[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_info[ctlr]->num_slots)
+ stop_slot = i;
+
+ for (j = start_slot; j < stop_slot; j++)
+ if (test_bit(j, tmp_inuse))
+ clear_bit(j, edma_info[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_info[ctlr]->edma_unused);
+ }
+ }
+
+ return 0;
+}
+
/*-----------------------------------------------------------------------*/
+static bool unused_chan_list_done;
+
/* Resource alloc/free: dma channels, parameter RAM slots */
/**
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) {
- channel = 0;
- for (;;) {
- channel = find_next_bit(edma_noevent,
- num_channels, channel);
- if (channel == num_channels)
- return -ENOMEM;
- if (!test_and_set_bit(channel, edma_inuse))
+ for (i = 0; i < arch_num_cc; i++) {
+ channel = 0;
+ for (;;) {
+ channel = find_next_bit(edma_info[i]->
+ edma_unused,
+ edma_info[i]->num_channels,
+ channel);
+ if (channel == edma_info[i]->num_channels)
+ break;
+ if (!test_and_set_bit(channel,
+ edma_info[i]->edma_inuse)) {
+ done = 1;
+ ctlr = i;
+ break;
+ }
+ channel++;
+ }
+ if (done)
break;
- channel++;
}
- } else if (channel >= num_channels) {
+ if (!done)
+ return -ENOMEM;
+ } else if (channel >= edma_info[ctlr]->num_channels) {
return -EINVAL;
- } else if (test_and_set_bit(channel, edma_inuse)) {
+ } else if (test_and_set_bit(channel, edma_info[ctlr]->edma_inuse)) {
return -EBUSY;
}
/* ensure access through shadow region 0 */
- edma_or_array2(EDMA_DRAE, 0, channel >> 5, 1 << (channel & 0x1f));
+ edma_or_array2(ctlr, EDMA_DRAE, 0, channel >> 5, 1 << (channel & 0x1f));
/* ensure no events are pending */
- edma_stop(channel);
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(channel),
+ 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(channel, callback, data);
+ setup_dma_interrupt(EDMA_CTLR_CHAN(ctlr, channel),
+ callback, data);
- map_dmach_queue(channel, eventq_no);
+ map_dmach_queue(ctlr, channel, eventq_no);
- return channel;
+ return EDMA_CTLR_CHAN(ctlr, channel);
}
EXPORT_SYMBOL(edma_alloc_channel);
*/
void edma_free_channel(unsigned channel)
{
- if (channel >= num_channels)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel >= edma_info[ctlr]->num_channels)
return;
setup_dma_interrupt(channel, NULL, NULL);
/* REVISIT should probably take out of shadow region 0 */
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(channel),
+ memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel),
&dummy_paramset, PARM_SIZE);
- clear_bit(channel, edma_inuse);
+ clear_bit(channel, edma_info[ctlr]->edma_inuse);
}
EXPORT_SYMBOL(edma_free_channel);
*
* Returns the number of the slot, else negative errno.
*/
-int edma_alloc_slot(int slot)
+int edma_alloc_slot(unsigned ctlr, int slot)
{
+ if (slot >= 0)
+ slot = EDMA_CHAN_SLOT(slot);
+
if (slot < 0) {
- slot = num_channels;
+ slot = edma_info[ctlr]->num_channels;
for (;;) {
- slot = find_next_zero_bit(edma_inuse,
- num_slots, slot);
- if (slot == num_slots)
+ slot = find_next_zero_bit(edma_info[ctlr]->edma_inuse,
+ edma_info[ctlr]->num_slots, slot);
+ if (slot == edma_info[ctlr]->num_slots)
return -ENOMEM;
- if (!test_and_set_bit(slot, edma_inuse))
+ if (!test_and_set_bit(slot,
+ edma_info[ctlr]->edma_inuse))
break;
}
- } else if (slot < num_channels || slot >= num_slots) {
+ } else if (slot < edma_info[ctlr]->num_channels ||
+ slot >= edma_info[ctlr]->num_slots) {
return -EINVAL;
- } else if (test_and_set_bit(slot, edma_inuse)) {
+ } else if (test_and_set_bit(slot, edma_info[ctlr]->edma_inuse)) {
return -EBUSY;
}
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(slot),
+ memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
&dummy_paramset, PARM_SIZE);
- return slot;
+ return EDMA_CTLR_CHAN(ctlr, slot);
}
EXPORT_SYMBOL(edma_alloc_slot);
*/
void edma_free_slot(unsigned slot)
{
- if (slot < num_channels || slot >= num_slots)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_channels ||
+ slot >= edma_info[ctlr]->num_slots)
return;
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(slot),
+ memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
&dummy_paramset, PARM_SIZE);
- clear_bit(slot, edma_inuse);
+ clear_bit(slot, edma_info[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_info[ctlr]->num_channels ||
+ slot >= edma_info[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_info[ctlr]->num_slots - edma_info[ctlr]->num_channels))
+ return -EINVAL;
+
+ switch (id) {
+ case EDMA_CONT_PARAMS_ANY:
+ return reserve_contiguous_slots(ctlr, id, count,
+ edma_info[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_info[ctlr]->num_channels ||
+ slot >= edma_info[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_info[ctlr]->edma_inuse);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(edma_free_cont_slots);
+
/*-----------------------------------------------------------------------*/
/* Parameter RAM operations (i) -- read/write partial slots */
void edma_set_src(unsigned slot, dma_addr_t src_port,
enum address_mode mode, enum fifo_width width)
{
- if (slot < num_slots) {
- unsigned int i = edma_parm_read(PARM_OPT, slot);
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_slots) {
+ unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
if (mode) {
/* set SAM and program FWID */
/* clear SAM */
i &= ~SAM;
}
- edma_parm_write(PARM_OPT, slot, i);
+ edma_parm_write(ctlr, PARM_OPT, slot, i);
/* set the source port address
in source register of param structure */
- edma_parm_write(PARM_SRC, slot, src_port);
+ edma_parm_write(ctlr, PARM_SRC, slot, src_port);
}
}
EXPORT_SYMBOL(edma_set_src);
void edma_set_dest(unsigned slot, dma_addr_t dest_port,
enum address_mode mode, enum fifo_width width)
{
- if (slot < num_slots) {
- unsigned int i = edma_parm_read(PARM_OPT, slot);
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_slots) {
+ unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
if (mode) {
/* set DAM and program FWID */
/* clear DAM */
i &= ~DAM;
}
- edma_parm_write(PARM_OPT, slot, i);
+ edma_parm_write(ctlr, PARM_OPT, slot, i);
/* set the destination port address
in dest register of param structure */
- edma_parm_write(PARM_DST, slot, dest_port);
+ edma_parm_write(ctlr, PARM_DST, slot, dest_port);
}
}
EXPORT_SYMBOL(edma_set_dest);
void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst)
{
struct edmacc_param temp;
+ unsigned ctlr;
- edma_read_slot(slot, &temp);
+ 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)
*/
void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx)
{
- if (slot < num_slots) {
- edma_parm_modify(PARM_SRC_DST_BIDX, slot,
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_slots) {
+ edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
0xffff0000, src_bidx);
- edma_parm_modify(PARM_SRC_DST_CIDX, slot,
+ edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
0xffff0000, src_cidx);
}
}
*/
void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx)
{
- if (slot < num_slots) {
- edma_parm_modify(PARM_SRC_DST_BIDX, slot,
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_slots) {
+ edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
0x0000ffff, dest_bidx << 16);
- edma_parm_modify(PARM_SRC_DST_CIDX, slot,
+ edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
0x0000ffff, dest_cidx << 16);
}
}
u16 acnt, u16 bcnt, u16 ccnt,
u16 bcnt_rld, enum sync_dimension sync_mode)
{
- if (slot < num_slots) {
- edma_parm_modify(PARM_LINK_BCNTRLD, slot,
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot < edma_info[ctlr]->num_slots) {
+ edma_parm_modify(ctlr, PARM_LINK_BCNTRLD, slot,
0x0000ffff, bcnt_rld << 16);
if (sync_mode == ASYNC)
- edma_parm_and(PARM_OPT, slot, ~SYNCDIM);
+ edma_parm_and(ctlr, PARM_OPT, slot, ~SYNCDIM);
else
- edma_parm_or(PARM_OPT, slot, SYNCDIM);
+ edma_parm_or(ctlr, PARM_OPT, slot, SYNCDIM);
/* Set the acount, bcount, ccount registers */
- edma_parm_write(PARM_A_B_CNT, slot, (bcnt << 16) | acnt);
- edma_parm_write(PARM_CCNT, slot, ccnt);
+ 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);
*/
void edma_link(unsigned from, unsigned to)
{
- if (from >= num_slots)
+ 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_info[ctlr_from]->num_slots)
return;
- if (to >= num_slots)
+ if (to >= edma_info[ctlr_to]->num_slots)
return;
- edma_parm_modify(PARM_LINK_BCNTRLD, from, 0xffff0000, PARM_OFFSET(to));
+ edma_parm_modify(ctlr_from, PARM_LINK_BCNTRLD, from, 0xffff0000,
+ PARM_OFFSET(to));
}
EXPORT_SYMBOL(edma_link);
*/
void edma_unlink(unsigned from)
{
- if (from >= num_slots)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(from);
+ from = EDMA_CHAN_SLOT(from);
+
+ if (from >= edma_info[ctlr]->num_slots)
return;
- edma_parm_or(PARM_LINK_BCNTRLD, from, 0xffff);
+ edma_parm_or(ctlr, PARM_LINK_BCNTRLD, from, 0xffff);
}
EXPORT_SYMBOL(edma_unlink);
*/
void edma_write_slot(unsigned slot, const struct edmacc_param *param)
{
- if (slot >= num_slots)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot >= edma_info[ctlr]->num_slots)
return;
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(slot), param, PARM_SIZE);
+ memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), param,
+ PARM_SIZE);
}
EXPORT_SYMBOL(edma_write_slot);
*/
void edma_read_slot(unsigned slot, struct edmacc_param *param)
{
- if (slot >= num_slots)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(slot);
+ slot = EDMA_CHAN_SLOT(slot);
+
+ if (slot >= edma_info[ctlr]->num_slots)
return;
- memcpy_fromio(param, edmacc_regs_base + PARM_OFFSET(slot), PARM_SIZE);
+ memcpy_fromio(param, edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
+ PARM_SIZE);
}
EXPORT_SYMBOL(edma_read_slot);
*/
void edma_pause(unsigned channel)
{
- if (channel < num_channels) {
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel < edma_info[ctlr]->num_channels) {
unsigned int mask = (1 << (channel & 0x1f));
- edma_shadow0_write_array(SH_EECR, channel >> 5, mask);
+ edma_shadow0_write_array(ctlr, SH_EECR, channel >> 5, mask);
}
}
EXPORT_SYMBOL(edma_pause);
*/
void edma_resume(unsigned channel)
{
- if (channel < num_channels) {
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel < edma_info[ctlr]->num_channels) {
unsigned int mask = (1 << (channel & 0x1f));
- edma_shadow0_write_array(SH_EESR, channel >> 5, mask);
+ edma_shadow0_write_array(ctlr, SH_EESR, channel >> 5, mask);
}
}
EXPORT_SYMBOL(edma_resume);
*/
int edma_start(unsigned channel)
{
- if (channel < num_channels) {
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel < edma_info[ctlr]->num_channels) {
int j = channel >> 5;
unsigned int mask = (1 << (channel & 0x1f));
/* EDMA channels without event association */
- if (test_bit(channel, edma_noevent)) {
+ if (test_bit(channel, edma_info[ctlr]->edma_unused)) {
pr_debug("EDMA: ESR%d %08x\n", j,
- edma_shadow0_read_array(SH_ESR, j));
- edma_shadow0_write_array(SH_ESR, j, mask);
+ 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(SH_ER, j));
- /* Clear any pending error */
- edma_write_array(EDMA_EMCR, j, mask);
+ 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(SH_SECR, j, mask);
- edma_shadow0_write_array(SH_EESR, j, mask);
+ 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(SH_EER, j));
+ edma_shadow0_read_array(ctlr, SH_EER, j));
return 0;
}
*/
void edma_stop(unsigned channel)
{
- if (channel < num_channels) {
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel < edma_info[ctlr]->num_channels) {
int j = channel >> 5;
unsigned int mask = (1 << (channel & 0x1f));
- edma_shadow0_write_array(SH_EECR, j, mask);
- edma_shadow0_write_array(SH_ECR, j, mask);
- edma_shadow0_write_array(SH_SECR, j, mask);
- edma_write_array(EDMA_EMCR, j, mask);
+ 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(SH_EER, j));
+ edma_shadow0_read_array(ctlr, SH_EER, j));
/* REVISIT: consider guarding against inappropriate event
* chaining by overwriting with dummy_paramset.
void edma_clean_channel(unsigned channel)
{
- if (channel < num_channels) {
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel < edma_info[ctlr]->num_channels) {
int j = (channel >> 5);
unsigned int mask = 1 << (channel & 0x1f);
pr_debug("EDMA: EMR%d %08x\n", j,
- edma_read_array(EDMA_EMR, j));
- edma_shadow0_write_array(SH_ECR, j, mask);
+ edma_read_array(ctlr, EDMA_EMR, j));
+ edma_shadow0_write_array(ctlr, SH_ECR, j, mask);
/* Clear the corresponding EMR bits */
- edma_write_array(EDMA_EMCR, j, mask);
+ edma_write_array(ctlr, EDMA_EMCR, j, mask);
/* Clear any SER */
- edma_shadow0_write_array(SH_SECR, j, mask);
- edma_write(EDMA_CCERRCLR, (1 << 16) | 0x3);
+ edma_shadow0_write_array(ctlr, SH_SECR, j, mask);
+ edma_write(ctlr, EDMA_CCERRCLR, (1 << 16) | 0x3);
}
}
EXPORT_SYMBOL(edma_clean_channel);
*/
void edma_clear_event(unsigned channel)
{
- if (channel >= num_channels)
+ unsigned ctlr;
+
+ ctlr = EDMA_CTLR(channel);
+ channel = EDMA_CHAN_SLOT(channel);
+
+ if (channel >= edma_info[ctlr]->num_channels)
return;
if (channel < 32)
- edma_write(EDMA_ECR, 1 << channel);
+ edma_write(ctlr, EDMA_ECR, 1 << channel);
else
- edma_write(EDMA_ECRH, 1 << (channel - 32));
+ edma_write(ctlr, EDMA_ECRH, 1 << (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;
- int i;
- int status;
- const s8 *noevent;
- int irq = 0, err_irq = 0;
- struct resource *r;
- resource_size_t len;
+ const s8 (*queue_priority_mapping)[2];
+ const s8 (*queue_tc_mapping)[2];
+ int i, j, found = 0;
+ int status = -1;
+ 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;
- r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "edma_cc");
- if (!r)
- 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]) {
+ 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;
+ }
- len = r->end - r->start + 1;
+ edmacc_regs_base[j] = ioremap(r[j]->start, len[j]);
+ if (!edmacc_regs_base[j]) {
+ status = -EBUSY;
+ goto fail1;
+ }
- r = request_mem_region(r->start, len, r->name);
- if (!r)
- return -EBUSY;
+ edma_info[j] = kmalloc(sizeof(struct edma), GFP_KERNEL);
+ if (!edma_info[j]) {
+ status = -ENOMEM;
+ goto fail1;
+ }
+ memset(edma_info[j], 0, sizeof(struct edma));
+
+ edma_info[j]->num_channels = min_t(unsigned, info[j].n_channel,
+ EDMA_MAX_DMACH);
+ edma_info[j]->num_slots = min_t(unsigned, info[j].n_slot,
+ EDMA_MAX_PARAMENTRY);
+ edma_info[j]->num_cc = min_t(unsigned, info[j].n_cc,
+ EDMA_MAX_CC);
+
+ edma_info[j]->default_queue = info[j].default_queue;
+ if (!edma_info[j]->default_queue)
+ edma_info[j]->default_queue = EVENTQ_1;
+
+ dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n",
+ edmacc_regs_base[j]);
+
+ for (i = 0; i < edma_info[j]->num_slots; i++)
+ memcpy_toio(edmacc_regs_base[j] + PARM_OFFSET(i),
+ &dummy_paramset, PARM_SIZE);
+
+ /* Mark all channels as unused */
+ memset(edma_info[j]->edma_unused, 0xff,
+ sizeof(edma_info[j]->edma_unused));
+
+ sprintf(irq_name, "edma%d", j);
+ irq[j] = platform_get_irq_byname(pdev, irq_name);
+ edma_info[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;
+ }
- edmacc_regs_base = ioremap(r->start, len);
- if (!edmacc_regs_base) {
- status = -EBUSY;
- goto fail1;
- }
+ sprintf(irq_name, "edma%d_err", j);
+ err_irq[j] = platform_get_irq_byname(pdev, irq_name);
+ edma_info[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;
+ }
- num_channels = min_t(unsigned, info->n_channel, EDMA_MAX_DMACH);
- num_slots = min_t(unsigned, info->n_slot, EDMA_MAX_PARAMENTRY);
+ /* Everything lives on transfer controller 1 until otherwise
+ * specified. This way, long transfers on the low priority queue
+ * started by the codec engine will not cause audio defects.
+ */
+ for (i = 0; i < edma_info[j]->num_channels; i++)
+ map_dmach_queue(j, i, EVENTQ_1);
- dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n", edmacc_regs_base);
+ queue_tc_mapping = info[j].queue_tc_mapping;
+ queue_priority_mapping = info[j].queue_priority_mapping;
- for (i = 0; i < num_slots; i++)
- memcpy_toio(edmacc_regs_base + PARM_OFFSET(i),
- &dummy_paramset, PARM_SIZE);
+ /* 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]);
- noevent = info->noevent;
- if (noevent) {
- while (*noevent != -1)
- set_bit(*noevent++, edma_noevent);
- }
+ /* 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]);
- irq = platform_get_irq(pdev, 0);
- status = request_irq(irq, dma_irq_handler, 0, "edma", &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
- irq, status);
- goto fail;
- }
+ /* Map the channel to param entry if channel mapping logic
+ * exist
+ */
+ if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST)
+ map_dmach_param(j);
- err_irq = platform_get_irq(pdev, 1);
- status = request_irq(err_irq, dma_ccerr_handler, 0,
- "edma_error", &pdev->dev);
- if (status < 0) {
- dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
- err_irq, status);
- goto fail;
+ 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) {
}
}
- /* Everything lives on transfer controller 1 until otherwise specified.
- * This way, long transfers on the low priority queue
- * started by the codec engine will not cause audio defects.
- */
- for (i = 0; i < num_channels; i++)
- map_dmach_queue(i, EVENTQ_1);
-
- /* Event queue to TC mapping */
- for (i = 0; queue_tc_mapping[i][0] != -1; i++)
- map_queue_tc(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(queue_priority_mapping[i][0],
- queue_priority_mapping[i][1]);
-
- for (i = 0; i < info->n_region; i++) {
- edma_write_array2(EDMA_DRAE, i, 0, 0x0);
- edma_write_array2(EDMA_DRAE, i, 1, 0x0);
- edma_write_array(EDMA_QRAE, i, 0x0);
- }
-
return 0;
fail:
- if (err_irq)
- free_irq(err_irq, NULL);
- if (irq)
- free_irq(irq, NULL);
- iounmap(edmacc_regs_base);
+ 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:
- release_mem_region(r->start, len);
+ 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_info[i]);
+ }
return status;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff