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[86.16.136.251]) by mx.google.com with ESMTPS id q20sm16491081wiv.7.2013.04.23.08.03.34 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 23 Apr 2013 08:03:35 -0700 (PDT) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 01/10] usb: musb: ux500: move channel number knowledge into the driver Date: Tue, 23 Apr 2013 16:03:05 +0100 Message-Id: <1366729394-11406-2-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1366729394-11406-1-git-send-email-lee.jones@linaro.org> References: <1366729394-11406-1-git-send-email-lee.jones@linaro.org> X-Gm-Message-State: ALoCoQlazvAcJUNRteGrkO3ghYcZPCf0tGdFZHs1MU29tA/H6/4hF2+B+aNFJkXaNcJExKNsKXnh X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130423_110338_835865_F1452402 X-CRM114-Status: GOOD ( 17.08 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: linus.walleij@stericsson.com, arnd@arndb.de, linux-usb@vger.kernel.org, Felipe Balbi , mian.yousaf.kaukab@stericsson.com, Lee Jones X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org For all ux500 based platforms the maximum number of end-points are used. Move this knowledge into the driver so we can relinquish the burden from platform data. This also removes quite a bit of complexity from the driver and will aid us when we come to enable the driver for Device Tree. Cc: Felipe Balbi Cc: linux-usb@vger.kernel.org Signed-off-by: Lee Jones Acked-by: Linus Walleij --- arch/arm/mach-ux500/usb.c | 14 ++++++------ drivers/usb/musb/ux500_dma.c | 30 ++++++++------------------ include/linux/platform_data/usb-musb-ux500.h | 5 +---- 3 files changed, 16 insertions(+), 33 deletions(-) diff --git a/arch/arm/mach-ux500/usb.c b/arch/arm/mach-ux500/usb.c index 821703d..8aff9a4 100644 --- a/arch/arm/mach-ux500/usb.c +++ b/arch/arm/mach-ux500/usb.c @@ -22,7 +22,7 @@ .dir = STEDMA40_MEM_TO_PERIPH, \ } -static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS] +static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS] = { MUSB_DMA40_RX_CH, MUSB_DMA40_RX_CH, @@ -34,7 +34,7 @@ static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS] MUSB_DMA40_RX_CH }; -static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS] +static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS] = { MUSB_DMA40_TX_CH, MUSB_DMA40_TX_CH, @@ -46,7 +46,7 @@ static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS] MUSB_DMA40_TX_CH, }; -static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = { +static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS] = { &musb_dma_rx_ch[0], &musb_dma_rx_ch[1], &musb_dma_rx_ch[2], @@ -57,7 +57,7 @@ static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = { &musb_dma_rx_ch[7] }; -static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = { +static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS] = { &musb_dma_tx_ch[0], &musb_dma_tx_ch[1], &musb_dma_tx_ch[2], @@ -71,8 +71,6 @@ static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = { static struct ux500_musb_board_data musb_board_data = { .dma_rx_param_array = ux500_dma_rx_param_array, .dma_tx_param_array = ux500_dma_tx_param_array, - .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS, - .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS, .dma_filter = stedma40_filter, }; @@ -119,7 +117,7 @@ static inline void ux500_usb_dma_update_rx_ch_config(int *dev_type) { u32 idx; - for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++) + for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; idx++) musb_dma_rx_ch[idx].dev_type = dev_type[idx]; } @@ -127,7 +125,7 @@ static inline void ux500_usb_dma_update_tx_ch_config(int *dev_type) { u32 idx; - for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++) + for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; idx++) musb_dma_tx_ch[idx].dev_type = dev_type[idx]; } diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c index 039e567d..c75e07a 100644 --- a/drivers/usb/musb/ux500_dma.c +++ b/drivers/usb/musb/ux500_dma.c @@ -47,10 +47,8 @@ struct ux500_dma_channel { struct ux500_dma_controller { struct dma_controller controller; - struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_CHANNELS]; - struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_TX_CHANNELS]; - u32 num_rx_channels; - u32 num_tx_channels; + struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS]; + struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS]; void *private_data; dma_addr_t phy_base; }; @@ -142,19 +140,15 @@ static struct dma_channel *ux500_dma_channel_allocate(struct dma_controller *c, struct ux500_dma_channel *ux500_channel = NULL; struct musb *musb = controller->private_data; u8 ch_num = hw_ep->epnum - 1; - u32 max_ch; - /* Max 8 DMA channels (0 - 7). Each DMA channel can only be allocated + /* 8 DMA channels (0 - 7). Each DMA channel can only be allocated * to specified hw_ep. For example DMA channel 0 can only be allocated * to hw_ep 1 and 9. */ if (ch_num > 7) ch_num -= 8; - max_ch = is_tx ? controller->num_tx_channels : - controller->num_rx_channels; - - if (ch_num >= max_ch) + if (ch_num >= UX500_MUSB_DMA_NUM_RX_TX_CHANNELS) return NULL; ux500_channel = is_tx ? &(controller->tx_channel[ch_num]) : @@ -262,7 +256,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c) struct dma_channel *channel; u8 ch_num; - for (ch_num = 0; ch_num < controller->num_rx_channels; ch_num++) { + for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) { channel = &controller->rx_channel[ch_num].channel; ux500_channel = channel->private_data; @@ -272,7 +266,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c) dma_release_channel(ux500_channel->dma_chan); } - for (ch_num = 0; ch_num < controller->num_tx_channels; ch_num++) { + for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) { channel = &controller->tx_channel[ch_num].channel; ux500_channel = channel->private_data; @@ -301,26 +295,21 @@ static int ux500_dma_controller_start(struct dma_controller *c) void **param_array; struct ux500_dma_channel *channel_array; - u32 ch_count; dma_cap_mask_t mask; - if ((data->num_rx_channels > UX500_MUSB_DMA_NUM_RX_CHANNELS) || - (data->num_tx_channels > UX500_MUSB_DMA_NUM_TX_CHANNELS)) - return -EINVAL; - controller->num_rx_channels = data->num_rx_channels; - controller->num_tx_channels = data->num_tx_channels; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); /* Prepare the loop for RX channels */ channel_array = controller->rx_channel; - ch_count = data->num_rx_channels; param_array = data->dma_rx_param_array; for (dir = 0; dir < 2; dir++) { - for (ch_num = 0; ch_num < ch_count; ch_num++) { + for (ch_num = 0; + ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; + ch_num++) { ux500_channel = &channel_array[ch_num]; ux500_channel->controller = controller; ux500_channel->ch_num = ch_num; @@ -348,7 +337,6 @@ static int ux500_dma_controller_start(struct dma_controller *c) /* Prepare the loop for TX channels */ channel_array = controller->tx_channel; - ch_count = data->num_tx_channels; param_array = data->dma_tx_param_array; is_tx = 1; } diff --git a/include/linux/platform_data/usb-musb-ux500.h b/include/linux/platform_data/usb-musb-ux500.h index 4c1cc50..dd9c83a 100644 --- a/include/linux/platform_data/usb-musb-ux500.h +++ b/include/linux/platform_data/usb-musb-ux500.h @@ -9,14 +9,11 @@ #include -#define UX500_MUSB_DMA_NUM_RX_CHANNELS 8 -#define UX500_MUSB_DMA_NUM_TX_CHANNELS 8 +#define UX500_MUSB_DMA_NUM_RX_TX_CHANNELS 8 struct ux500_musb_board_data { void **dma_rx_param_array; void **dma_tx_param_array; - u32 num_rx_channels; - u32 num_tx_channels; bool (*dma_filter)(struct dma_chan *chan, void *filter_param); };