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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-05 13:20:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-05 13:20:43 -0700
commit2d1eb87ae1e6f3999e77989fd2f831b134270787 (patch)
treeadf505adb17c96929c797920613afa3dc5731650 /arch/arm/mach-omap1
parent2f997759dffe5458446075a58734df39d8035e6e (diff)
parentbce5669be3a8946952258a064ef26defeb887138 (diff)
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM changes from Russell King: - Perf updates from Will Deacon: - Support for Qualcomm Krait processors (run perf on your phone!) - Support for Cortex-A12 (run perf stat on your FPGA!) - Support for perf_sample_event_took, allowing us to automatically decrease the sample rate if we can't handle the PMU interrupts quickly enough (run perf record on your FPGA!). - Basic uprobes support from David Long: This patch series adds basic uprobes support to ARM. It is based on patches developed earlier by Rabin Vincent. That approach of adding hooks into the kprobes instruction parsing code was not well received. This approach separates the ARM instruction parsing code in kprobes out into a separate set of functions which can be used by both kprobes and uprobes. Both kprobes and uprobes then provide their own semantic action tables to process the results of the parsing. - ARMv7M (microcontroller) updates from Uwe Kleine-König - OMAP DMA updates (recently added Vinod's Ack even though they've been sitting in linux-next for a few months) to reduce the reliance of omap-dma on the code in arch/arm. - SA11x0 changes from Dmitry Eremin-Solenikov and Alexander Shiyan - Support for Cortex-A12 CPU - Align support for ARMv6 with ARMv7 so they can cooperate better in a single zImage. - Addition of first AT_HWCAP2 feature bits for ARMv8 crypto support. - Removal of IRQ_DISABLED from various ARM files - Improved efficiency of virt_to_page() for single zImage - Patch from Ulf Hansson to permit runtime PM callbacks to be available for AMBA devices for suspend/resume as well. - Finally kill asm/system.h on ARM. * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (89 commits) dmaengine: omap-dma: more consolidation of CCR register setup dmaengine: omap-dma: move IRQ handling to omap-dma dmaengine: omap-dma: move register read/writes into omap-dma.c ARM: omap: dma: get rid of 'p' allocation and clean up ARM: omap: move dma channel allocation into plat-omap code ARM: omap: dma: get rid of errata global ARM: omap: clean up DMA register accesses ARM: omap: remove almost-const variables ARM: omap: remove references to disable_irq_lch dmaengine: omap-dma: cleanup errata 3.3 handling dmaengine: omap-dma: provide register read/write functions dmaengine: omap-dma: use cached CCR value when enabling DMA dmaengine: omap-dma: move barrier to omap_dma_start_desc() dmaengine: omap-dma: move clnk_ctrl setting to preparation functions dmaengine: omap-dma: improve efficiency loading C.SA/C.EI/C.FI registers dmaengine: omap-dma: consolidate clearing channel status register dmaengine: omap-dma: move CCR buffering disable errata out of the fast path dmaengine: omap-dma: provide register definitions dmaengine: omap-dma: consolidate setup of CCR dmaengine: omap-dma: consolidate setup of CSDP ...
Diffstat (limited to 'arch/arm/mach-omap1')
-rw-r--r--arch/arm/mach-omap1/dma.c191
1 files changed, 79 insertions, 112 deletions
diff --git a/arch/arm/mach-omap1/dma.c b/arch/arm/mach-omap1/dma.c
index 5bb8ce86d54b..4be601b638d7 100644
--- a/arch/arm/mach-omap1/dma.c
+++ b/arch/arm/mach-omap1/dma.c
@@ -32,55 +32,51 @@
#define OMAP1_DMA_BASE (0xfffed800)
#define OMAP1_LOGICAL_DMA_CH_COUNT 17
-#define OMAP1_DMA_STRIDE 0x40
-static u32 errata;
static u32 enable_1510_mode;
-static u8 dma_stride;
-static enum omap_reg_offsets dma_common_ch_start, dma_common_ch_end;
-
-static u16 reg_map[] = {
- [GCR] = 0x400,
- [GSCR] = 0x404,
- [GRST1] = 0x408,
- [HW_ID] = 0x442,
- [PCH2_ID] = 0x444,
- [PCH0_ID] = 0x446,
- [PCH1_ID] = 0x448,
- [PCHG_ID] = 0x44a,
- [PCHD_ID] = 0x44c,
- [CAPS_0] = 0x44e,
- [CAPS_1] = 0x452,
- [CAPS_2] = 0x456,
- [CAPS_3] = 0x458,
- [CAPS_4] = 0x45a,
- [PCH2_SR] = 0x460,
- [PCH0_SR] = 0x480,
- [PCH1_SR] = 0x482,
- [PCHD_SR] = 0x4c0,
+
+static const struct omap_dma_reg reg_map[] = {
+ [GCR] = { 0x0400, 0x00, OMAP_DMA_REG_16BIT },
+ [GSCR] = { 0x0404, 0x00, OMAP_DMA_REG_16BIT },
+ [GRST1] = { 0x0408, 0x00, OMAP_DMA_REG_16BIT },
+ [HW_ID] = { 0x0442, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH2_ID] = { 0x0444, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH0_ID] = { 0x0446, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH1_ID] = { 0x0448, 0x00, OMAP_DMA_REG_16BIT },
+ [PCHG_ID] = { 0x044a, 0x00, OMAP_DMA_REG_16BIT },
+ [PCHD_ID] = { 0x044c, 0x00, OMAP_DMA_REG_16BIT },
+ [CAPS_0] = { 0x044e, 0x00, OMAP_DMA_REG_2X16BIT },
+ [CAPS_1] = { 0x0452, 0x00, OMAP_DMA_REG_2X16BIT },
+ [CAPS_2] = { 0x0456, 0x00, OMAP_DMA_REG_16BIT },
+ [CAPS_3] = { 0x0458, 0x00, OMAP_DMA_REG_16BIT },
+ [CAPS_4] = { 0x045a, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH2_SR] = { 0x0460, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH0_SR] = { 0x0480, 0x00, OMAP_DMA_REG_16BIT },
+ [PCH1_SR] = { 0x0482, 0x00, OMAP_DMA_REG_16BIT },
+ [PCHD_SR] = { 0x04c0, 0x00, OMAP_DMA_REG_16BIT },
/* Common Registers */
- [CSDP] = 0x00,
- [CCR] = 0x02,
- [CICR] = 0x04,
- [CSR] = 0x06,
- [CEN] = 0x10,
- [CFN] = 0x12,
- [CSFI] = 0x14,
- [CSEI] = 0x16,
- [CPC] = 0x18, /* 15xx only */
- [CSAC] = 0x18,
- [CDAC] = 0x1a,
- [CDEI] = 0x1c,
- [CDFI] = 0x1e,
- [CLNK_CTRL] = 0x28,
+ [CSDP] = { 0x0000, 0x40, OMAP_DMA_REG_16BIT },
+ [CCR] = { 0x0002, 0x40, OMAP_DMA_REG_16BIT },
+ [CICR] = { 0x0004, 0x40, OMAP_DMA_REG_16BIT },
+ [CSR] = { 0x0006, 0x40, OMAP_DMA_REG_16BIT },
+ [CEN] = { 0x0010, 0x40, OMAP_DMA_REG_16BIT },
+ [CFN] = { 0x0012, 0x40, OMAP_DMA_REG_16BIT },
+ [CSFI] = { 0x0014, 0x40, OMAP_DMA_REG_16BIT },
+ [CSEI] = { 0x0016, 0x40, OMAP_DMA_REG_16BIT },
+ [CPC] = { 0x0018, 0x40, OMAP_DMA_REG_16BIT }, /* 15xx only */
+ [CSAC] = { 0x0018, 0x40, OMAP_DMA_REG_16BIT },
+ [CDAC] = { 0x001a, 0x40, OMAP_DMA_REG_16BIT },
+ [CDEI] = { 0x001c, 0x40, OMAP_DMA_REG_16BIT },
+ [CDFI] = { 0x001e, 0x40, OMAP_DMA_REG_16BIT },
+ [CLNK_CTRL] = { 0x0028, 0x40, OMAP_DMA_REG_16BIT },
/* Channel specific register offsets */
- [CSSA] = 0x08,
- [CDSA] = 0x0c,
- [COLOR] = 0x20,
- [CCR2] = 0x24,
- [LCH_CTRL] = 0x2a,
+ [CSSA] = { 0x0008, 0x40, OMAP_DMA_REG_2X16BIT },
+ [CDSA] = { 0x000c, 0x40, OMAP_DMA_REG_2X16BIT },
+ [COLOR] = { 0x0020, 0x40, OMAP_DMA_REG_2X16BIT },
+ [CCR2] = { 0x0024, 0x40, OMAP_DMA_REG_16BIT },
+ [LCH_CTRL] = { 0x002a, 0x40, OMAP_DMA_REG_16BIT },
};
static struct resource res[] __initdata = {
@@ -181,44 +177,36 @@ static struct resource res[] __initdata = {
static void __iomem *dma_base;
static inline void dma_write(u32 val, int reg, int lch)
{
- u8 stride;
- u32 offset;
+ void __iomem *addr = dma_base;
- stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
- offset = reg_map[reg] + (stride * lch);
+ addr += reg_map[reg].offset;
+ addr += reg_map[reg].stride * lch;
- __raw_writew(val, dma_base + offset);
- if ((reg > CLNK_CTRL && reg < CCEN) ||
- (reg > PCHD_ID && reg < CAPS_2)) {
- u32 offset2 = reg_map[reg] + 2 + (stride * lch);
- __raw_writew(val >> 16, dma_base + offset2);
- }
+ __raw_writew(val, addr);
+ if (reg_map[reg].type == OMAP_DMA_REG_2X16BIT)
+ __raw_writew(val >> 16, addr + 2);
}
static inline u32 dma_read(int reg, int lch)
{
- u8 stride;
- u32 offset, val;
-
- stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
- offset = reg_map[reg] + (stride * lch);
-
- val = __raw_readw(dma_base + offset);
- if ((reg > CLNK_CTRL && reg < CCEN) ||
- (reg > PCHD_ID && reg < CAPS_2)) {
- u16 upper;
- u32 offset2 = reg_map[reg] + 2 + (stride * lch);
- upper = __raw_readw(dma_base + offset2);
- val |= (upper << 16);
- }
+ void __iomem *addr = dma_base;
+ uint32_t val;
+
+ addr += reg_map[reg].offset;
+ addr += reg_map[reg].stride * lch;
+
+ val = __raw_readw(addr);
+ if (reg_map[reg].type == OMAP_DMA_REG_2X16BIT)
+ val |= __raw_readw(addr + 2) << 16;
+
return val;
}
static void omap1_clear_lch_regs(int lch)
{
- int i = dma_common_ch_start;
+ int i;
- for (; i <= dma_common_ch_end; i += 1)
+ for (i = CPC; i <= COLOR; i += 1)
dma_write(0, i, lch);
}
@@ -255,8 +243,9 @@ static void omap1_show_dma_caps(void)
return;
}
-static u32 configure_dma_errata(void)
+static unsigned configure_dma_errata(void)
{
+ unsigned errata = 0;
/*
* Erratum 3.2/3.3: sometimes 0 is returned if CSAC/CDAC is
@@ -272,11 +261,23 @@ static const struct platform_device_info omap_dma_dev_info = {
.name = "omap-dma-engine",
.id = -1,
.dma_mask = DMA_BIT_MASK(32),
+ .res = res,
+ .num_res = 1,
+};
+
+static struct omap_system_dma_plat_info dma_plat_info __initdata = {
+ .reg_map = reg_map,
+ .channel_stride = 0x40,
+ .show_dma_caps = omap1_show_dma_caps,
+ .clear_lch_regs = omap1_clear_lch_regs,
+ .clear_dma = omap1_clear_dma,
+ .dma_write = dma_write,
+ .dma_read = dma_read,
};
static int __init omap1_system_dma_init(void)
{
- struct omap_system_dma_plat_info *p;
+ struct omap_system_dma_plat_info p;
struct omap_dma_dev_attr *d;
struct platform_device *pdev, *dma_pdev;
int ret;
@@ -302,20 +303,12 @@ static int __init omap1_system_dma_init(void)
goto exit_iounmap;
}
- p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
- if (!p) {
- dev_err(&pdev->dev, "%s: Unable to allocate 'p' for %s\n",
- __func__, pdev->name);
- ret = -ENOMEM;
- goto exit_iounmap;
- }
-
d = kzalloc(sizeof(struct omap_dma_dev_attr), GFP_KERNEL);
if (!d) {
dev_err(&pdev->dev, "%s: Unable to allocate 'd' for %s\n",
__func__, pdev->name);
ret = -ENOMEM;
- goto exit_release_p;
+ goto exit_iounmap;
}
d->lch_count = OMAP1_LOGICAL_DMA_CH_COUNT;
@@ -336,17 +329,6 @@ static int __init omap1_system_dma_init(void)
d->dev_caps |= CLEAR_CSR_ON_READ;
d->dev_caps |= IS_WORD_16;
-
- d->chan = kzalloc(sizeof(struct omap_dma_lch) *
- (d->lch_count), GFP_KERNEL);
- if (!d->chan) {
- dev_err(&pdev->dev,
- "%s: Memory allocation failed for d->chan!\n",
- __func__);
- ret = -ENOMEM;
- goto exit_release_d;
- }
-
if (cpu_is_omap15xx())
d->chan_count = 9;
else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
@@ -356,35 +338,24 @@ static int __init omap1_system_dma_init(void)
d->chan_count = 9;
}
- p->dma_attr = d;
-
- p->show_dma_caps = omap1_show_dma_caps;
- p->clear_lch_regs = omap1_clear_lch_regs;
- p->clear_dma = omap1_clear_dma;
- p->dma_write = dma_write;
- p->dma_read = dma_read;
- p->disable_irq_lch = NULL;
-
- p->errata = configure_dma_errata();
+ p = dma_plat_info;
+ p.dma_attr = d;
+ p.errata = configure_dma_errata();
- ret = platform_device_add_data(pdev, p, sizeof(*p));
+ ret = platform_device_add_data(pdev, &p, sizeof(p));
if (ret) {
dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
__func__, pdev->name, pdev->id);
- goto exit_release_chan;
+ goto exit_release_d;
}
ret = platform_device_add(pdev);
if (ret) {
dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
__func__, pdev->name, pdev->id);
- goto exit_release_chan;
+ goto exit_release_d;
}
- dma_stride = OMAP1_DMA_STRIDE;
- dma_common_ch_start = CPC;
- dma_common_ch_end = COLOR;
-
dma_pdev = platform_device_register_full(&omap_dma_dev_info);
if (IS_ERR(dma_pdev)) {
ret = PTR_ERR(dma_pdev);
@@ -395,12 +366,8 @@ static int __init omap1_system_dma_init(void)
exit_release_pdev:
platform_device_del(pdev);
-exit_release_chan:
- kfree(d->chan);
exit_release_d:
kfree(d);
-exit_release_p:
- kfree(p);
exit_iounmap:
iounmap(dma_base);
exit_device_put: