aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap1/dma.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-omap1/dma.c')
-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:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:13:35 +0000