diff options
author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2017-06-16 10:41:03 -0500 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-20 11:45:01 +0800 |
commit | 9c691cc9f8b5f2f866f1235800f03a1d7a06c1af (patch) | |
tree | 16e97c814ff2864887bd9dd4122468a885539ae3 /drivers/usb/musb | |
parent | 868772d89d08a7743d24babbde33abea61022590 (diff) | |
download | linux-stable-9c691cc9f8b5f2f866f1235800f03a1d7a06c1af.tar.gz linux-stable-9c691cc9f8b5f2f866f1235800f03a1d7a06c1af.tar.bz2 linux-stable-9c691cc9f8b5f2f866f1235800f03a1d7a06c1af.zip |
usb: musb: tusb6010_omap: Convert to DMAengine API
With the port_window support in DMAengine and the sDMA driver we can
convert the driver to DMAengine.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
-rw-r--r-- | drivers/usb/musb/tusb6010_omap.c | 201 |
1 files changed, 80 insertions, 121 deletions
diff --git a/drivers/usb/musb/tusb6010_omap.c b/drivers/usb/musb/tusb6010_omap.c index 1c4592d753bf..e8060e49b0f4 100644 --- a/drivers/usb/musb/tusb6010_omap.c +++ b/drivers/usb/musb/tusb6010_omap.c @@ -15,7 +15,7 @@ #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/slab.h> -#include <linux/omap-dma.h> +#include <linux/dmaengine.h> #include "musb_core.h" #include "tusb6010.h" @@ -24,17 +24,9 @@ #define MAX_DMAREQ 5 /* REVISIT: Really 6, but req5 not OK */ -#define OMAP24XX_DMA_EXT_DMAREQ0 2 -#define OMAP24XX_DMA_EXT_DMAREQ1 3 -#define OMAP242X_DMA_EXT_DMAREQ2 14 -#define OMAP242X_DMA_EXT_DMAREQ3 15 -#define OMAP242X_DMA_EXT_DMAREQ4 16 -#define OMAP242X_DMA_EXT_DMAREQ5 64 - struct tusb_dma_data { - int ch; s8 dmareq; - s8 sync_dev; + struct dma_chan *chan; }; struct tusb_omap_dma_ch { @@ -105,7 +97,7 @@ static inline void tusb_omap_free_shared_dmareq(struct tusb_omap_dma_ch *chdat) * See also musb_dma_completion in plat_uds.c and musb_g_[tx|rx]() in * musb_gadget.c. */ -static void tusb_omap_dma_cb(int lch, u16 ch_status, void *data) +static void tusb_omap_dma_cb(void *data) { struct dma_channel *channel = (struct dma_channel *)data; struct tusb_omap_dma_ch *chdat = to_chdat(channel); @@ -116,18 +108,11 @@ static void tusb_omap_dma_cb(int lch, u16 ch_status, void *data) void __iomem *ep_conf = hw_ep->conf; void __iomem *mbase = musb->mregs; unsigned long remaining, flags, pio; - int ch; spin_lock_irqsave(&musb->lock, flags); - ch = chdat->dma_data->ch; - - if (ch_status != OMAP_DMA_BLOCK_IRQ) - printk(KERN_ERR "TUSB DMA error status: %i\n", ch_status); - - dev_dbg(musb->controller, "ep%i %s dma callback ch: %i status: %x\n", - chdat->epnum, chdat->tx ? "tx" : "rx", - ch, ch_status); + dev_dbg(musb->controller, "ep%i %s dma callback\n", + chdat->epnum, chdat->tx ? "tx" : "rx"); if (chdat->tx) remaining = musb_readl(ep_conf, TUSB_EP_TX_OFFSET); @@ -138,8 +123,8 @@ static void tusb_omap_dma_cb(int lch, u16 ch_status, void *data) /* HW issue #10: XFR_SIZE may get corrupt on DMA (both async & sync) */ if (unlikely(remaining > chdat->transfer_len)) { - dev_dbg(musb->controller, "Corrupt %s dma ch%i XFR_SIZE: 0x%08lx\n", - chdat->tx ? "tx" : "rx", ch, remaining); + dev_dbg(musb->controller, "Corrupt %s XFR_SIZE: 0x%08lx\n", + chdat->tx ? "tx" : "rx", remaining); remaining = 0; } @@ -206,13 +191,16 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, struct musb_hw_ep *hw_ep = chdat->hw_ep; void __iomem *mbase = musb->mregs; void __iomem *ep_conf = hw_ep->conf; - dma_addr_t fifo = hw_ep->fifo_sync; - struct omap_dma_channel_params dma_params; + dma_addr_t fifo_addr = hw_ep->fifo_sync; u32 dma_remaining; - int src_burst, dst_burst; u16 csr; u32 psize; struct tusb_dma_data *dma_data; + struct dma_async_tx_descriptor *dma_desc; + struct dma_slave_config dma_cfg; + enum dma_transfer_direction dma_dir; + u32 port_window; + int ret; if (unlikely(dma_addr & 0x1) || (len < 32) || (len > packet_sz)) return false; @@ -238,10 +226,8 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, dma_remaining = TUSB_EP_CONFIG_XFR_SIZE(dma_remaining); if (dma_remaining) { - dev_dbg(musb->controller, "Busy %s dma ch%i, not using: %08x\n", - chdat->tx ? "tx" : "rx", - chdat->dma_data ? chdat->dma_data->ch : -1, - dma_remaining); + dev_dbg(musb->controller, "Busy %s dma, not using: %08x\n", + chdat->tx ? "tx" : "rx", dma_remaining); return false; } @@ -258,7 +244,7 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, dev_dbg(musb->controller, "could not get dma for ep%i\n", chdat->epnum); return false; } - if (dma_data->ch < 0) { + if (dma_data->dmareq < 0) { /* REVISIT: This should get blocked earlier, happens * with MSC ErrorRecoveryTest */ @@ -267,8 +253,6 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, } } - omap_set_dma_callback(dma_data->ch, tusb_omap_dma_cb, channel); - chdat->packet_sz = packet_sz; chdat->len = len; channel->actual_len = 0; @@ -276,79 +260,68 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, channel->status = MUSB_DMA_STATUS_BUSY; /* Since we're recycling dma areas, we need to clean or invalidate */ - if (chdat->tx) + if (chdat->tx) { + dma_dir = DMA_MEM_TO_DEV; dma_map_single(dev, phys_to_virt(dma_addr), len, DMA_TO_DEVICE); - else + } else { + dma_dir = DMA_DEV_TO_MEM; dma_map_single(dev, phys_to_virt(dma_addr), len, DMA_FROM_DEVICE); + } + + memset(&dma_cfg, 0, sizeof(dma_cfg)); /* Use 16-bit transfer if dma_addr is not 32-bit aligned */ if ((dma_addr & 0x3) == 0) { - dma_params.data_type = OMAP_DMA_DATA_TYPE_S32; - dma_params.elem_count = 8; /* Elements in frame */ + dma_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + dma_cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + port_window = 8; } else { - dma_params.data_type = OMAP_DMA_DATA_TYPE_S16; - dma_params.elem_count = 16; /* Elements in frame */ - fifo = hw_ep->fifo_async; - } + dma_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + dma_cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + port_window = 16; - dma_params.frame_count = chdat->transfer_len / 32; /* Burst sz frame */ + fifo_addr = hw_ep->fifo_async; + } - dev_dbg(musb->controller, "ep%i %s dma ch%i dma: %pad len: %u(%u) packet_sz: %i(%i)\n", - chdat->epnum, chdat->tx ? "tx" : "rx", - dma_data->ch, &dma_addr, chdat->transfer_len, len, - chdat->transfer_packet_sz, packet_sz); + dev_dbg(musb->controller, + "ep%i %s dma: %pad len: %u(%u) packet_sz: %i(%i)\n", + chdat->epnum, chdat->tx ? "tx" : "rx", &dma_addr, + chdat->transfer_len, len, chdat->transfer_packet_sz, packet_sz); + + dma_cfg.src_addr = fifo_addr; + dma_cfg.dst_addr = fifo_addr; + dma_cfg.src_port_window_size = port_window; + dma_cfg.src_maxburst = port_window; + dma_cfg.dst_port_window_size = port_window; + dma_cfg.dst_maxburst = port_window; + + ret = dmaengine_slave_config(dma_data->chan, &dma_cfg); + if (ret) { + dev_err(musb->controller, "DMA slave config failed: %d\n", ret); + return false; + } - /* - * Prepare omap DMA for transfer - */ - if (chdat->tx) { - dma_params.src_amode = OMAP_DMA_AMODE_POST_INC; - dma_params.src_start = (unsigned long)dma_addr; - dma_params.src_ei = 0; - dma_params.src_fi = 0; - - dma_params.dst_amode = OMAP_DMA_AMODE_DOUBLE_IDX; - dma_params.dst_start = (unsigned long)fifo; - dma_params.dst_ei = 1; - dma_params.dst_fi = -31; /* Loop 32 byte window */ - - dma_params.trigger = dma_data->sync_dev; - dma_params.sync_mode = OMAP_DMA_SYNC_FRAME; - dma_params.src_or_dst_synch = 0; /* Dest sync */ - - src_burst = OMAP_DMA_DATA_BURST_16; /* 16x32 read */ - dst_burst = OMAP_DMA_DATA_BURST_8; /* 8x32 write */ - } else { - dma_params.src_amode = OMAP_DMA_AMODE_DOUBLE_IDX; - dma_params.src_start = (unsigned long)fifo; - dma_params.src_ei = 1; - dma_params.src_fi = -31; /* Loop 32 byte window */ - - dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC; - dma_params.dst_start = (unsigned long)dma_addr; - dma_params.dst_ei = 0; - dma_params.dst_fi = 0; - - dma_params.trigger = dma_data->sync_dev; - dma_params.sync_mode = OMAP_DMA_SYNC_FRAME; - dma_params.src_or_dst_synch = 1; /* Source sync */ - - src_burst = OMAP_DMA_DATA_BURST_8; /* 8x32 read */ - dst_burst = OMAP_DMA_DATA_BURST_16; /* 16x32 write */ + dma_desc = dmaengine_prep_slave_single(dma_data->chan, dma_addr, + chdat->transfer_len, dma_dir, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!dma_desc) { + dev_err(musb->controller, "DMA prep_slave_single failed\n"); + return false; } - dev_dbg(musb->controller, "ep%i %s using %i-bit %s dma from 0x%08lx to 0x%08lx\n", + dma_desc->callback = tusb_omap_dma_cb; + dma_desc->callback_param = channel; + dmaengine_submit(dma_desc); + + dev_dbg(musb->controller, + "ep%i %s using %i-bit %s dma from %pad to %pad\n", chdat->epnum, chdat->tx ? "tx" : "rx", - (dma_params.data_type == OMAP_DMA_DATA_TYPE_S32) ? 32 : 16, + dma_cfg.src_addr_width * 8, ((dma_addr & 0x3) == 0) ? "sync" : "async", - dma_params.src_start, dma_params.dst_start); - - omap_set_dma_params(dma_data->ch, &dma_params); - omap_set_dma_src_burst_mode(dma_data->ch, src_burst); - omap_set_dma_dest_burst_mode(dma_data->ch, dst_burst); - omap_set_dma_write_mode(dma_data->ch, OMAP_DMA_WRITE_LAST_NON_POSTED); + (dma_dir == DMA_MEM_TO_DEV) ? &dma_addr : &fifo_addr, + (dma_dir == DMA_MEM_TO_DEV) ? &fifo_addr : &dma_addr); /* * Prepare MUSB for DMA transfer @@ -368,10 +341,8 @@ static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz, csr | MUSB_RXCSR_P_WZC_BITS); } - /* - * Start DMA transfer - */ - omap_start_dma(dma_data->ch); + /* Start DMA transfer */ + dma_async_issue_pending(dma_data->chan); if (chdat->tx) { /* Send transfer_packet_sz packets at a time */ @@ -401,7 +372,7 @@ static int tusb_omap_dma_abort(struct dma_channel *channel) struct tusb_omap_dma_ch *chdat = to_chdat(channel); if (chdat->dma_data) - omap_stop_dma(chdat->dma_data->ch); + dmaengine_terminate_all(chdat->dma_data->chan); channel->status = MUSB_DMA_STATUS_FREE; @@ -511,11 +482,11 @@ tusb_omap_dma_allocate(struct dma_controller *c, dma_data = chdat->dma_data; - dev_dbg(musb->controller, "ep%i %s dma: %s dma%i dmareq%i sync%i\n", + dev_dbg(musb->controller, "ep%i %s dma: %s dmareq%i\n", chdat->epnum, chdat->tx ? "tx" : "rx", tusb_dma->multichannel ? "shared" : "dedicated", - dma_data->ch, dma_data->dmareq, dma_data->sync_dev); + dma_data->dmareq); return channel; @@ -533,12 +504,11 @@ static void tusb_omap_dma_release(struct dma_channel *channel) struct tusb_omap_dma_ch *chdat = to_chdat(channel); struct musb *musb = chdat->musb; - dev_dbg(musb->controller, "ep%i ch%i\n", chdat->epnum, - chdat->dma_data->ch); + dev_dbg(musb->controller, "Release for ep%i\n", chdat->epnum); channel->status = MUSB_DMA_STATUS_UNKNOWN; - omap_stop_dma(chdat->dma_data->ch); + dmaengine_terminate_sync(chdat->dma_data->chan); tusb_omap_dma_free_dmareq(chdat); channel = NULL; @@ -558,8 +528,8 @@ void tusb_dma_controller_destroy(struct dma_controller *c) } /* Free up the DMA channels */ - if (tusb_dma && tusb_dma->dma_pool[i].ch >= 0) - omap_free_dma(tusb_dma->dma_pool[i].ch); + if (tusb_dma && tusb_dma->dma_pool[i].chan) + dma_release_channel(tusb_dma->dma_pool[i].chan); } kfree(tusb_dma); @@ -568,16 +538,9 @@ EXPORT_SYMBOL_GPL(tusb_dma_controller_destroy); static int tusb_omap_allocate_dma_pool(struct tusb_omap_dma *tusb_dma) { + struct musb *musb = tusb_dma->controller.musb; int i; int ret = 0; - const int sync_dev[6] = { - OMAP24XX_DMA_EXT_DMAREQ0, - OMAP24XX_DMA_EXT_DMAREQ1, - OMAP242X_DMA_EXT_DMAREQ2, - OMAP242X_DMA_EXT_DMAREQ3, - OMAP242X_DMA_EXT_DMAREQ4, - OMAP242X_DMA_EXT_DMAREQ5, - }; for (i = 0; i < MAX_DMAREQ; i++) { struct tusb_dma_data *dma_data = &tusb_dma->dma_pool[i]; @@ -591,22 +554,18 @@ static int tusb_omap_allocate_dma_pool(struct tusb_omap_dma *tusb_dma) char ch_name[8]; sprintf(ch_name, "dmareq%d", i); - dma_data->sync_dev = sync_dev[i]; - dma_data->ch = -1; - /* callback data is ngoing to be set later */ - ret = omap_request_dma(dma_data->sync_dev, ch_name, - tusb_omap_dma_cb, NULL, &dma_data->ch); - if (ret != 0) { - dev_err(tusb_dma->controller.musb->controller, + dma_data->chan = dma_request_chan(musb->controller, + ch_name); + if (IS_ERR(dma_data->chan)) { + dev_err(musb->controller, "Failed to request %s\n", ch_name); + ret = PTR_ERR(dma_data->chan); goto dma_error; } dma_data->dmareq = i; } else { dma_data->dmareq = -1; - dma_data->sync_dev = -1; - dma_data->ch = -1; } } @@ -616,8 +575,8 @@ dma_error: for (; i >= 0; i--) { struct tusb_dma_data *dma_data = &tusb_dma->dma_pool[i]; - if (dma_data->ch >= 0) - omap_free_dma(dma_data->ch); + if (dma_data->dmareq >= 0) + dma_release_channel(dma_data->chan); } return ret; |