diff options
Diffstat (limited to 'arch/cris/arch-v32/mach-fs/dma.c')
| -rw-r--r-- | arch/cris/arch-v32/mach-fs/dma.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/arch/cris/arch-v32/mach-fs/dma.c b/arch/cris/arch-v32/mach-fs/dma.c deleted file mode 100644 index c0347a4f8c65..000000000000 --- a/arch/cris/arch-v32/mach-fs/dma.c +++ /dev/null @@ -1,229 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Wrapper for DMA channel allocator that starts clocks etc */ - -#include <linux/kernel.h> -#include <linux/spinlock.h> -#include <asm/dma.h> -#include <hwregs/reg_map.h> -#include <hwregs/reg_rdwr.h> -#include <hwregs/marb_defs.h> -#include <hwregs/config_defs.h> -#include <hwregs/strmux_defs.h> -#include <linux/errno.h> -#include <mach/arbiter.h> - -static char used_dma_channels[MAX_DMA_CHANNELS]; -static const char *used_dma_channels_users[MAX_DMA_CHANNELS]; - -static DEFINE_SPINLOCK(dma_lock); - -int crisv32_request_dma(unsigned int dmanr, const char *device_id, - unsigned options, unsigned int bandwidth, - enum dma_owner owner) -{ - unsigned long flags; - reg_config_rw_clk_ctrl clk_ctrl; - reg_strmux_rw_cfg strmux_cfg; - - if (crisv32_arbiter_allocate_bandwidth(dmanr, - options & DMA_INT_MEM ? - INT_REGION : EXT_REGION, - bandwidth)) - return -ENOMEM; - - spin_lock_irqsave(&dma_lock, flags); - - if (used_dma_channels[dmanr]) { - spin_unlock_irqrestore(&dma_lock, flags); - if (options & DMA_VERBOSE_ON_ERROR) { - printk(KERN_ERR "Failed to request DMA %i for %s, " - "already allocated by %s\n", - dmanr, - device_id, - used_dma_channels_users[dmanr]); - } - if (options & DMA_PANIC_ON_ERROR) - panic("request_dma error!"); - return -EBUSY; - } - clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); - strmux_cfg = REG_RD(strmux, regi_strmux, rw_cfg); - - switch (dmanr) { - case 0: - case 1: - clk_ctrl.dma01_eth0 = 1; - break; - case 2: - case 3: - clk_ctrl.dma23 = 1; - break; - case 4: - case 5: - clk_ctrl.dma45 = 1; - break; - case 6: - case 7: - clk_ctrl.dma67 = 1; - break; - case 8: - case 9: - clk_ctrl.dma89_strcop = 1; - break; -#if MAX_DMA_CHANNELS-1 != 9 -#error Check dma.c -#endif - default: - spin_unlock_irqrestore(&dma_lock, flags); - if (options & DMA_VERBOSE_ON_ERROR) { - printk(KERN_ERR "Failed to request DMA %i for %s, " - "only 0-%i valid)\n", - dmanr, device_id, MAX_DMA_CHANNELS - 1); - } - - if (options & DMA_PANIC_ON_ERROR) - panic("request_dma error!"); - return -EINVAL; - } - - switch (owner) { - case dma_eth0: - if (dmanr == 0) - strmux_cfg.dma0 = regk_strmux_eth0; - else if (dmanr == 1) - strmux_cfg.dma1 = regk_strmux_eth0; - else - panic("Invalid DMA channel for eth0\n"); - break; - case dma_eth1: - if (dmanr == 6) - strmux_cfg.dma6 = regk_strmux_eth1; - else if (dmanr == 7) - strmux_cfg.dma7 = regk_strmux_eth1; - else - panic("Invalid DMA channel for eth1\n"); - break; - case dma_iop0: - if (dmanr == 2) - strmux_cfg.dma2 = regk_strmux_iop0; - else if (dmanr == 3) - strmux_cfg.dma3 = regk_strmux_iop0; - else - panic("Invalid DMA channel for iop0\n"); - break; - case dma_iop1: - if (dmanr == 4) - strmux_cfg.dma4 = regk_strmux_iop1; - else if (dmanr == 5) - strmux_cfg.dma5 = regk_strmux_iop1; - else - panic("Invalid DMA channel for iop1\n"); - break; - case dma_ser0: - if (dmanr == 6) - strmux_cfg.dma6 = regk_strmux_ser0; - else if (dmanr == 7) - strmux_cfg.dma7 = regk_strmux_ser0; - else - panic("Invalid DMA channel for ser0\n"); - break; - case dma_ser1: - if (dmanr == 4) - strmux_cfg.dma4 = regk_strmux_ser1; - else if (dmanr == 5) - strmux_cfg.dma5 = regk_strmux_ser1; - else - panic("Invalid DMA channel for ser1\n"); - break; - case dma_ser2: - if (dmanr == 2) - strmux_cfg.dma2 = regk_strmux_ser2; - else if (dmanr == 3) - strmux_cfg.dma3 = regk_strmux_ser2; - else - panic("Invalid DMA channel for ser2\n"); - break; - case dma_ser3: - if (dmanr == 8) - strmux_cfg.dma8 = regk_strmux_ser3; - else if (dmanr == 9) - strmux_cfg.dma9 = regk_strmux_ser3; - else - panic("Invalid DMA channel for ser3\n"); - break; - case dma_sser0: - if (dmanr == 4) - strmux_cfg.dma4 = regk_strmux_sser0; - else if (dmanr == 5) - strmux_cfg.dma5 = regk_strmux_sser0; - else - panic("Invalid DMA channel for sser0\n"); - break; - case dma_sser1: - if (dmanr == 6) - strmux_cfg.dma6 = regk_strmux_sser1; - else if (dmanr == 7) - strmux_cfg.dma7 = regk_strmux_sser1; - else - panic("Invalid DMA channel for sser1\n"); - break; - case dma_ata: - if (dmanr == 2) - strmux_cfg.dma2 = regk_strmux_ata; - else if (dmanr == 3) - strmux_cfg.dma3 = regk_strmux_ata; - else - panic("Invalid DMA channel for ata\n"); - break; - case dma_strp: - if (dmanr == 8) - strmux_cfg.dma8 = regk_strmux_strcop; - else if (dmanr == 9) - strmux_cfg.dma9 = regk_strmux_strcop; - else - panic("Invalid DMA channel for strp\n"); - break; - case dma_ext0: - if (dmanr == 6) - strmux_cfg.dma6 = regk_strmux_ext0; - else - panic("Invalid DMA channel for ext0\n"); - break; - case dma_ext1: - if (dmanr == 7) - strmux_cfg.dma7 = regk_strmux_ext1; - else - panic("Invalid DMA channel for ext1\n"); - break; - case dma_ext2: - if (dmanr == 2) - strmux_cfg.dma2 = regk_strmux_ext2; - else if (dmanr == 8) - strmux_cfg.dma8 = regk_strmux_ext2; - else - panic("Invalid DMA channel for ext2\n"); - break; - case dma_ext3: - if (dmanr == 3) - strmux_cfg.dma3 = regk_strmux_ext3; - else if (dmanr == 9) - strmux_cfg.dma9 = regk_strmux_ext2; - else - panic("Invalid DMA channel for ext2\n"); - break; - } - - used_dma_channels[dmanr] = 1; - used_dma_channels_users[dmanr] = device_id; - REG_WR(config, regi_config, rw_clk_ctrl, clk_ctrl); - REG_WR(strmux, regi_strmux, rw_cfg, strmux_cfg); - spin_unlock_irqrestore(&dma_lock, flags); - return 0; -} - -void crisv32_free_dma(unsigned int dmanr) -{ - spin_lock(&dma_lock); - used_dma_channels[dmanr] = 0; - spin_unlock(&dma_lock); -} |
