From 4d96372e6daae89166fed7883ee092dc8db80b21 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 3 Jul 2008 12:24:31 +0300 Subject: ARM: OMAP: DMA: Make channels dynamic for multi-boot Make DMA channels dynamic for multi-boot Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/dma.c | 62 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 41 insertions(+), 21 deletions(-) (limited to 'arch/arm/plat-omap/dma.c') diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 39c637b0ffe..02f00a98783 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -72,7 +72,6 @@ struct omap_dma_lch { long flags; }; -#ifndef CONFIG_ARCH_OMAP1 struct dma_link_info { int *linked_dmach_q; int no_of_lchs_linked; @@ -86,7 +85,9 @@ struct dma_link_info { }; -static struct dma_link_info dma_linked_lch[OMAP_LOGICAL_DMA_CH_COUNT]; +static struct dma_link_info *dma_linked_lch; + +#ifndef CONFIG_ARCH_OMAP1 /* Chain handling macros */ #define OMAP_DMA_CHAIN_QINIT(chain_id) \ @@ -119,12 +120,14 @@ static struct dma_link_info dma_linked_lch[OMAP_LOGICAL_DMA_CH_COUNT]; dma_linked_lch[chain_id].q_count++; \ } while (0) #endif + +static int dma_lch_count; static int dma_chan_count; static spinlock_t dma_chan_lock; -static struct omap_dma_lch dma_chan[OMAP_LOGICAL_DMA_CH_COUNT]; +static struct omap_dma_lch *dma_chan; -static const u8 omap1_dma_irq[OMAP_LOGICAL_DMA_CH_COUNT] = { +static const u8 omap1_dma_irq[OMAP1_LOGICAL_DMA_CH_COUNT] = { INT_DMA_CH0_6, INT_DMA_CH1_7, INT_DMA_CH2_8, INT_DMA_CH3, INT_DMA_CH4, INT_DMA_CH5, INT_1610_DMA_CH6, INT_1610_DMA_CH7, INT_1610_DMA_CH8, INT_1610_DMA_CH9, INT_1610_DMA_CH10, @@ -727,7 +730,7 @@ omap_dma_set_prio_lch(int lch, unsigned char read_prio, { u32 w; - if (unlikely((lch < 0 || lch >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((lch < 0 || lch >= dma_lch_count))) { printk(KERN_ERR "Invalid channel id\n"); return -EINVAL; } @@ -775,7 +778,7 @@ void omap_start_dma(int lch) { if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch; - char dma_chan_link_map[OMAP_LOGICAL_DMA_CH_COUNT]; + char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT]; dma_chan_link_map[lch] = 1; /* Set the link register of the first channel */ @@ -819,7 +822,7 @@ void omap_stop_dma(int lch) { if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch = lch; - char dma_chan_link_map[OMAP_LOGICAL_DMA_CH_COUNT]; + char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT]; memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map)); do { @@ -1061,7 +1064,7 @@ int omap_request_dma_chain(int dev_id, const char *dev_name, } if (unlikely((no_of_chans < 1 - || no_of_chans > OMAP_LOGICAL_DMA_CH_COUNT))) { + || no_of_chans > dma_lch_count))) { printk(KERN_ERR "Invalid Number of channels requested\n"); return -EINVAL; } @@ -1138,7 +1141,7 @@ int omap_modify_dma_chain_params(int chain_id, /* Check for input params */ if (unlikely((chain_id < 0 - || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1176,7 +1179,7 @@ int omap_free_dma_chain(int chain_id) u32 i; /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1216,7 +1219,7 @@ EXPORT_SYMBOL(omap_free_dma_chain); int omap_dma_chain_status(int chain_id) { /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1265,7 +1268,7 @@ int omap_dma_chain_a_transfer(int chain_id, int src_start, int dest_start, /* Check for input params */ if (unlikely((chain_id < 0 - || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1382,7 +1385,7 @@ int omap_start_dma_chain_transfers(int chain_id) int *channels; u32 w, i; - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1435,7 +1438,7 @@ int omap_stop_dma_chain_transfers(int chain_id) u32 sys_cf; /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1497,7 +1500,7 @@ int omap_get_dma_chain_index(int chain_id, int *ei, int *fi) int *channels; /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1537,7 +1540,7 @@ int omap_get_dma_chain_dst_pos(int chain_id) int *channels; /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1571,7 +1574,7 @@ int omap_get_dma_chain_src_pos(int chain_id) int *channels; /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) { + if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) { printk(KERN_ERR "Invalid chain id\n"); return -EINVAL; } @@ -1724,7 +1727,7 @@ static irqreturn_t omap2_dma_irq_handler(int irq, void *dev_id) printk(KERN_WARNING "Spurious DMA IRQ\n"); return IRQ_HANDLED; } - for (i = 0; i < OMAP_LOGICAL_DMA_CH_COUNT && val != 0; i++) { + for (i = 0; i < dma_lch_count && val != 0; i++) { if (val & 1) omap2_dma_handle_ch(i); val >>= 1; @@ -2106,6 +2109,25 @@ static int __init omap_init_dma(void) { int ch, r; + if (cpu_class_is_omap1()) + dma_lch_count = OMAP1_LOGICAL_DMA_CH_COUNT; + else + dma_lch_count = OMAP_DMA4_LOGICAL_DMA_CH_COUNT; + + dma_chan = kzalloc(sizeof(struct omap_dma_lch) * dma_lch_count, + GFP_KERNEL); + if (!dma_chan) + return -ENOMEM; + + if (cpu_class_is_omap2()) { + dma_linked_lch = kzalloc(sizeof(struct dma_link_info) * + dma_lch_count, GFP_KERNEL); + if (!dma_linked_lch) { + kfree(dma_chan); + return -ENOMEM; + } + } + if (cpu_is_omap15xx()) { printk(KERN_INFO "DMA support for OMAP15xx initialized\n"); dma_chan_count = 9; @@ -2142,16 +2164,14 @@ static int __init omap_init_dma(void) u8 revision = omap_readb(OMAP_DMA4_REVISION); printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n", revision >> 4, revision & 0xf); - dma_chan_count = OMAP_LOGICAL_DMA_CH_COUNT; + dma_chan_count = OMAP_DMA4_LOGICAL_DMA_CH_COUNT; } else { dma_chan_count = 0; return 0; } - memset(&lcd_dma, 0, sizeof(lcd_dma)); spin_lock_init(&lcd_dma.lock); spin_lock_init(&dma_chan_lock); - memset(&dma_chan, 0, sizeof(dma_chan)); for (ch = 0; ch < dma_chan_count; ch++) { omap_clear_dma(ch); -- cgit v1.2.3