4 Aug
2015
4 Aug
'15
11:31 p.m.
On Tuesday, August 04, 2015 at 11:04:38 PM, slemieux.tyco@gmail.com wrote:
From: Sylvain Lemieux slemieux@tycoint.com
Incorporate DMA driver from legacy LPCLinux NXP BSP. The files taken from the legacy patch are:
- lpc32xx DMA driver
- lpc3250 header file DMA registers definition.
The legacy driver was updated and clean-up as part of the integration with the latest u-boot.
Signed-off-by: Sylvain Lemieux slemieux@tycoint.com
[...]
+/*
- The "dmac_ll" structure is mapping the DMA channel register,
- as per UM10326, "LPC32x0 and LPC32x0/01 User manual" - Rev. 3
- tables 84, 85, 86 & 87.
- The DMA client (ex. NAND SLC) can use this macro to write the
- next DMA linked list item address.
- */
+#define lpc32xx_dmac_next_lli(x) (uint32_t)x
Ew, and it's not even used :-)
+/* DMA linked list structure used with a channel's LLI register */ +struct lpc32xx_dmac_ll {
- u32 dma_src;
- u32 dma_dest;
- u32 next_lli;
- u32 next_ctrl;
+};
[...]
+int lpc32xx_dma_wait_status(int channel) +{
- unsigned long start;
- start = get_timer(0);
- while (1) {
Here , you can do
reg = readl(); reg |= readl(); if (reg & BIT_MASK()) break;
if (((readl(&dma->raw_tc_stat) | readl(dma->raw_err_stat))& BIT_MASK(channel)) != 0)break;if (get_timer(start) > 10000)return -1;udelay(1);- }
- if (unlikely(readl(&dma->raw_err_stat) & BIT_MASK(channel))) {
setbits_le32(&dma->int_err_clear, BIT_MASK(channel));setbits_le32(&dma->raw_err_stat, BIT_MASK(channel));return -1;- }
- setbits_le32(&dma->int_tc_clear, BIT_MASK(channel));
- setbits_le32(&dma->raw_tc_stat, BIT_MASK(channel));
- return 0;
+}
Other than that,
Acked-by: Marek Vasut marex@denx.de