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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2011-06-06 14:18:44 +0900 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-07 09:10:09 -0700 |
commit | d3af90a5e4e8fb7a93d408799682e566c9270808 (patch) | |
tree | 9eb60a7464d0f1eb380d65ff89239b0a5a044f77 /drivers/usb | |
parent | 97664a207bc2601a03a300f00e6922038cd5b99c (diff) | |
download | linux-d3af90a5e4e8fb7a93d408799682e566c9270808.tar.gz linux-d3af90a5e4e8fb7a93d408799682e566c9270808.tar.bz2 linux-d3af90a5e4e8fb7a93d408799682e566c9270808.zip |
usb: renesas_usbhs: add usbhsf_fifo
renesas_usbhs has CFIFO/D0FIFO/D1FIFO.
But current renesas_usbhs is using CFIFO (for PIO) only for now.
The fifo selection method is needed for DMAEngine support.
This is a preparation for DMAEngine support
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/renesas_usbhs/common.c | 9 | ||||
-rw-r--r-- | drivers/usb/renesas_usbhs/common.h | 5 | ||||
-rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 75 | ||||
-rw-r--r-- | drivers/usb/renesas_usbhs/fifo.h | 12 |
4 files changed, 77 insertions, 24 deletions
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c index f3664d6af661..e510b29216b3 100644 --- a/drivers/usb/renesas_usbhs/common.c +++ b/drivers/usb/renesas_usbhs/common.c @@ -323,10 +323,14 @@ static int __devinit usbhs_probe(struct platform_device *pdev) if (ret < 0) goto probe_end_iounmap; - ret = usbhs_mod_probe(priv); + ret = usbhs_fifo_probe(priv); if (ret < 0) goto probe_end_pipe_exit; + ret = usbhs_mod_probe(priv); + if (ret < 0) + goto probe_end_fifo_exit; + /* dev_set_drvdata should be called after usbhs_mod_init */ dev_set_drvdata(&pdev->dev, priv); @@ -374,6 +378,8 @@ probe_end_call_remove: usbhs_platform_call(priv, hardware_exit, pdev); probe_end_mod_exit: usbhs_mod_remove(priv); +probe_end_fifo_exit: + usbhs_fifo_remove(priv); probe_end_pipe_exit: usbhs_pipe_remove(priv); probe_end_iounmap: @@ -404,6 +410,7 @@ static int __devexit usbhs_remove(struct platform_device *pdev) usbhs_platform_call(priv, hardware_exit, pdev); usbhs_mod_remove(priv); + usbhs_fifo_remove(priv); usbhs_pipe_remove(priv); iounmap(priv->base); kfree(priv); diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h index 7bf675c23a5e..06d7239a044d 100644 --- a/drivers/usb/renesas_usbhs/common.h +++ b/drivers/usb/renesas_usbhs/common.h @@ -194,6 +194,11 @@ struct usbhs_priv { * pipe control */ struct usbhs_pipe_info pipe_info; + + /* + * fifo control + */ + struct usbhs_fifo_info fifo_info; }; /* diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 3cda71e5a35a..53e2b35dd325 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -19,6 +19,8 @@ #include "./common.h" #include "./pipe.h" +#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) + /* * packet info function */ @@ -194,20 +196,22 @@ static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) /* * FIFO ctrl */ -static void usbhsf_send_terminator(struct usbhs_pipe *pipe) +static void usbhsf_send_terminator(struct usbhs_pipe *pipe, + struct usbhs_fifo *fifo) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); - usbhs_bset(priv, CFIFOCTR, BVAL, BVAL); + usbhs_bset(priv, fifo->ctr, BVAL, BVAL); } -static int usbhsf_fifo_barrier(struct usbhs_priv *priv) +static int usbhsf_fifo_barrier(struct usbhs_priv *priv, + struct usbhs_fifo *fifo) { int timeout = 1024; do { /* The FIFO port is accessible */ - if (usbhs_read(priv, CFIFOCTR) & FRDY) + if (usbhs_read(priv, fifo->ctr) & FRDY) return 0; udelay(10); @@ -216,22 +220,26 @@ static int usbhsf_fifo_barrier(struct usbhs_priv *priv) return -EBUSY; } -static void usbhsf_fifo_clear(struct usbhs_pipe *pipe) +static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, + struct usbhs_fifo *fifo) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); if (!usbhs_pipe_is_dcp(pipe)) - usbhsf_fifo_barrier(priv); + usbhsf_fifo_barrier(priv, fifo); - usbhs_write(priv, CFIFOCTR, BCLR); + usbhs_write(priv, fifo->ctr, BCLR); } -static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv) +static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, + struct usbhs_fifo *fifo) { - return usbhs_read(priv, CFIFOCTR) & DTLN_MASK; + return usbhs_read(priv, fifo->ctr) & DTLN_MASK; } -static int usbhsf_fifo_select(struct usbhs_pipe *pipe, int write) +static int usbhsf_fifo_select(struct usbhs_pipe *pipe, + struct usbhs_fifo *fifo, + int write) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); struct device *dev = usbhs_priv_to_dev(priv); @@ -243,11 +251,11 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe, int write) base |= (1 == write) << 5; /* ISEL */ /* "base" will be used below */ - usbhs_write(priv, CFIFOSEL, base | MBW_32); + usbhs_write(priv, fifo->sel, base | MBW_32); /* check ISEL and CURPIPE value */ while (timeout--) { - if (base == (mask & usbhs_read(priv, CFIFOSEL))) + if (base == (mask & usbhs_read(priv, fifo->sel))) return 0; udelay(10); } @@ -265,14 +273,15 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done) struct usbhs_pipe *pipe = pkt->pipe; struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); struct device *dev = usbhs_priv_to_dev(priv); - void __iomem *addr = priv->base + CFIFO; + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ + void __iomem *addr = priv->base + fifo->port; u8 *buf; int maxp = usbhs_pipe_get_maxpacket(pipe); int total_len; int i, ret, len; int is_short; - ret = usbhsf_fifo_select(pipe, 1); + ret = usbhsf_fifo_select(pipe, fifo, 1); if (ret < 0) goto usbhs_fifo_write_busy; @@ -280,7 +289,7 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done) if (ret < 0) goto usbhs_fifo_write_busy; - ret = usbhsf_fifo_barrier(priv); + ret = usbhsf_fifo_barrier(priv, fifo); if (ret < 0) goto usbhs_fifo_write_busy; @@ -321,7 +330,7 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done) * pipe/irq handling */ if (is_short) - usbhsf_send_terminator(pipe); + usbhsf_send_terminator(pipe, fifo); usbhsf_tx_irq_ctrl(pipe, !*is_done); usbhs_pipe_enable(pipe); @@ -358,19 +367,21 @@ struct usbhs_pkt_handle usbhs_fifo_push_handler = { static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) { struct usbhs_pipe *pipe = pkt->pipe; + struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ int ret; /* * select pipe and enable it to prepare packet receive */ - ret = usbhsf_fifo_select(pipe, 0); + ret = usbhsf_fifo_select(pipe, fifo, 0); if (ret < 0) return ret; usbhs_pipe_enable(pipe); usbhsf_rx_irq_ctrl(pipe, 1); - return ret; + return 0; } static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done) @@ -378,7 +389,8 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done) struct usbhs_pipe *pipe = pkt->pipe; struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); struct device *dev = usbhs_priv_to_dev(priv); - void __iomem *addr = priv->base + CFIFO; + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ + void __iomem *addr = priv->base + fifo->port; u8 *buf; u32 data = 0; int maxp = usbhs_pipe_get_maxpacket(pipe); @@ -386,15 +398,15 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done) int i, ret; int total_len = 0; - ret = usbhsf_fifo_select(pipe, 0); + ret = usbhsf_fifo_select(pipe, fifo, 0); if (ret < 0) return ret; - ret = usbhsf_fifo_barrier(priv); + ret = usbhsf_fifo_barrier(priv, fifo); if (ret < 0) return ret; - rcv_len = usbhsf_fifo_rcv_len(priv); + rcv_len = usbhsf_fifo_rcv_len(priv, fifo); buf = pkt->buf + pkt->actual; len = pkt->length - pkt->actual; @@ -408,7 +420,7 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done) * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" */ if (0 == rcv_len) { - usbhsf_fifo_clear(pipe); + usbhsf_fifo_clear(pipe, fifo); goto usbhs_fifo_read_end; } @@ -555,3 +567,20 @@ void usbhs_fifo_quit(struct usbhs_priv *priv) mod->irq_bempsts = 0; mod->irq_brdysts = 0; } + +int usbhs_fifo_probe(struct usbhs_priv *priv) +{ + struct usbhs_fifo *fifo; + + /* CFIFO */ + fifo = usbhsf_get_cfifo(priv); + fifo->port = CFIFO; + fifo->sel = CFIFOSEL; + fifo->ctr = CFIFOCTR; + + return 0; +} + +void usbhs_fifo_remove(struct usbhs_priv *priv) +{ +} diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h index fcb1ecef57da..04d000ae7bdc 100644 --- a/drivers/usb/renesas_usbhs/fifo.h +++ b/drivers/usb/renesas_usbhs/fifo.h @@ -19,6 +19,16 @@ #include "pipe.h" +struct usbhs_fifo { + u32 port; /* xFIFO */ + u32 sel; /* xFIFOSEL */ + u32 ctr; /* xFIFOCTR */ +}; + +struct usbhs_fifo_info { + struct usbhs_fifo cfifo; +}; + struct usbhs_pkt_handle; struct usbhs_pkt { struct list_head node; @@ -38,6 +48,8 @@ struct usbhs_pkt_handle { /* * fifo */ +int usbhs_fifo_probe(struct usbhs_priv *priv); +void usbhs_fifo_remove(struct usbhs_priv *priv); void usbhs_fifo_init(struct usbhs_priv *priv); void usbhs_fifo_quit(struct usbhs_priv *priv); |