diff options
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/mx28.c | 6 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx28/dma.h | 4 | ||||
| -rw-r--r-- | drivers/dma/apbh_dma.c | 38 | ||||
| -rw-r--r-- | drivers/mmc/mxsmmc.c | 5 | ||||
| -rw-r--r-- | drivers/mtd/nand/mxs_nand.c | 11 |
5 files changed, 40 insertions, 24 deletions
diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28.c b/arch/arm/cpu/arm926ejs/mx28/mx28.c index cf6d4e9..dc0338d 100644 --- a/arch/arm/cpu/arm926ejs/mx28/mx28.c +++ b/arch/arm/cpu/arm926ejs/mx28/mx28.c @@ -30,6 +30,7 @@ #include <asm/errno.h> #include <asm/io.h> #include <asm/arch/clock.h> +#include <asm/arch/dma.h> #include <asm/arch/gpio.h> #include <asm/arch/iomux.h> #include <asm/arch/imx-regs.h> @@ -172,6 +173,11 @@ int arch_cpu_init(void) */ mxs_gpio_init(); +#ifdef CONFIG_APBH_DMA + /* Start APBH DMA */ + mxs_dma_init(); +#endif + return 0; } #endif diff --git a/arch/arm/include/asm/arch-mx28/dma.h b/arch/arm/include/asm/arch-mx28/dma.h index 52747e2..4a1820b 100644 --- a/arch/arm/include/asm/arch-mx28/dma.h +++ b/arch/arm/include/asm/arch-mx28/dma.h @@ -140,6 +140,8 @@ void mxs_dma_desc_free(struct mxs_dma_desc *); int mxs_dma_desc_append(int channel, struct mxs_dma_desc *pdesc); int mxs_dma_go(int chan); -int mxs_dma_init(void); +void mxs_dma_init(void); +int mxs_dma_init_channel(int chan); +int mxs_dma_release(int chan); #endif /* __DMA_H__ */ diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c index c086629..cb2193e 100644 --- a/drivers/dma/apbh_dma.c +++ b/drivers/dma/apbh_dma.c @@ -316,7 +316,7 @@ static int mxs_dma_request(int channel) * The channel will NOT be released if it's marked "busy" (see * mxs_dma_enable()). */ -static int mxs_dma_release(int channel) +int mxs_dma_release(int channel) { struct mxs_dma_chan *pchan; int ret; @@ -552,12 +552,10 @@ int mxs_dma_go(int chan) /* * Initialize the DMA hardware */ -int mxs_dma_init(void) +void mxs_dma_init(void) { struct mx28_apbh_regs *apbh_regs = (struct mx28_apbh_regs *)MXS_APBH_BASE; - struct mxs_dma_chan *pchan; - int ret, channel; mx28_reset_block(&apbh_regs->hw_apbh_ctrl0_reg); @@ -576,28 +574,26 @@ int mxs_dma_init(void) writel(APBH_CTRL0_APB_BURST_EN, &apbh_regs->hw_apbh_ctrl0_clr); #endif +} - for (channel = 0; channel < MXS_MAX_DMA_CHANNELS; channel++) { - pchan = mxs_dma_channels + channel; - pchan->flags = MXS_DMA_FLAGS_VALID; - - ret = mxs_dma_request(channel); +int mxs_dma_init_channel(int channel) +{ + struct mxs_dma_chan *pchan; + int ret; - if (ret) { - printf("MXS DMA: Can't acquire DMA channel %i\n", - channel); + pchan = mxs_dma_channels + channel; + pchan->flags = MXS_DMA_FLAGS_VALID; - goto err; - } + ret = mxs_dma_request(channel); - mxs_dma_reset(channel); - mxs_dma_ack_irq(channel); + if (ret) { + printf("MXS DMA: Can't acquire DMA channel %i\n", + channel); + return ret; } - return 0; + mxs_dma_reset(channel); + mxs_dma_ack_irq(channel); -err: - while (--channel >= 0) - mxs_dma_release(channel); - return ret; + return 0; } diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c index dfceaef..35c6bda 100644 --- a/drivers/mmc/mxsmmc.c +++ b/drivers/mmc/mxsmmc.c @@ -338,6 +338,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int)) (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; struct mmc *mmc = NULL; struct mxsmmc_priv *priv = NULL; + int ret; mmc = malloc(sizeof(struct mmc)); if (!mmc) @@ -356,6 +357,10 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int)) return -ENOMEM; } + ret = mxs_dma_init_channel(id); + if (ret) + return ret; + priv->mmc_is_wp = wp; priv->id = id; switch (id) { diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c index 4b1297a..9c95811 100644 --- a/drivers/mtd/nand/mxs_nand.c +++ b/drivers/mtd/nand/mxs_nand.c @@ -1058,7 +1058,7 @@ int mxs_nand_init(struct mxs_nand_info *info) { struct mx28_gpmi_regs *gpmi_regs = (struct mx28_gpmi_regs *)MXS_GPMI_BASE; - int i = 0; + int i = 0, j; info->desc = malloc(sizeof(struct mxs_dma_desc *) * MXS_NAND_DMA_DESCRIPTOR_COUNT); @@ -1073,7 +1073,11 @@ int mxs_nand_init(struct mxs_nand_info *info) } /* Init the DMA controller. */ - mxs_dma_init(); + for (j = MXS_DMA_CHANNEL_AHB_APBH_GPMI0; + j <= MXS_DMA_CHANNEL_AHB_APBH_GPMI7; j++) { + if (mxs_dma_init_channel(j)) + goto err3; + } /* Reset the GPMI block. */ mx28_reset_block(&gpmi_regs->hw_gpmi_ctrl0_reg); @@ -1089,6 +1093,9 @@ int mxs_nand_init(struct mxs_nand_info *info) return 0; +err3: + for (--j; j >= 0; j--) + mxs_dma_release(j); err2: free(info->desc); err1: |