From 1efc80b53eb54770139219f99657abd92595fc86 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Sat, 19 Jul 2008 16:57:32 +0800 Subject: Blackfin arch: Functional power management support Enable: PM_SUSPEND_MEM -> Blackfin Hibernate to SDRAM This feature requires a special bootloader (u-boot) supporting return from hibernate. Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- arch/blackfin/kernel/bfin_dma_5xx.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'arch/blackfin/kernel/bfin_dma_5xx.c') diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index d54f19085f3..ad0e75845ac 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -472,6 +472,32 @@ unsigned long get_dma_curr_addr(unsigned int channel) } EXPORT_SYMBOL(get_dma_curr_addr); +#ifdef CONFIG_PM +int blackfin_dma_suspend(void) +{ + int i; + + for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) { + if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) { + printk(KERN_ERR "DMA Channel %d failed to suspend\n", i); + return -EBUSY; + } + + dma_ch[i].saved_peripheral_map = dma_ch[i].regs->peripheral_map; + } + + return 0; +} + +void blackfin_dma_resume(void) +{ + int i; + + for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) + dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map; +} +#endif + static void *__dma_memcpy(void *dest, const void *src, size_t size) { int direction; /* 1 - address decrease, 0 - address increase */ -- cgit v1.2.3 From 377d43e7d07fc9a64eb162c6f70e6d1961604629 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Sat, 26 Jul 2008 18:28:03 +0800 Subject: Blackfin arch: fix bug - IMDMA is not type struct dma_register TEMP Workaround - avoid access to PERIPHERAL_MAP Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- arch/blackfin/kernel/bfin_dma_5xx.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/blackfin/kernel/bfin_dma_5xx.c') diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index ad0e75845ac..93229b3d6e3 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -477,7 +477,11 @@ int blackfin_dma_suspend(void) { int i; +#ifdef CONFIG_BF561 /* IMDMA channels doesn't have a PERIPHERAL_MAP */ + for (i = 0; i <= CH_MEM_STREAM3_SRC; i++) { +#else for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) { +#endif if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) { printk(KERN_ERR "DMA Channel %d failed to suspend\n", i); return -EBUSY; @@ -493,7 +497,11 @@ void blackfin_dma_resume(void) { int i; +#ifdef CONFIG_BF561 /* IMDMA channels doesn't have a PERIPHERAL_MAP */ + for (i = 0; i <= CH_MEM_STREAM3_SRC; i++) +#else for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) +#endif dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map; } #endif -- cgit v1.2.3