50511449dd
DMA data width and packet size information is only required at channel configuration time. Any information passed from platform data is passed directly to the DMA40 driver to use during channel allocation, but these pieces of information are subsequently ignored by the driver, so we may as well remove them. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2011
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*
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* Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/platform_device.h>
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#include <linux/usb/musb.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_data/usb-musb-ux500.h>
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#include <linux/platform_data/dma-ste-dma40.h>
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#include "db8500-regs.h"
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#define MUSB_DMA40_RX_CH { \
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.mode = STEDMA40_MODE_LOGICAL, \
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.dir = STEDMA40_PERIPH_TO_MEM, \
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}
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#define MUSB_DMA40_TX_CH { \
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.mode = STEDMA40_MODE_LOGICAL, \
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.dir = STEDMA40_MEM_TO_PERIPH, \
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}
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static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
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= {
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH,
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MUSB_DMA40_RX_CH
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};
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static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
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= {
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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MUSB_DMA40_TX_CH,
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};
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static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
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&musb_dma_rx_ch[0],
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&musb_dma_rx_ch[1],
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&musb_dma_rx_ch[2],
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&musb_dma_rx_ch[3],
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&musb_dma_rx_ch[4],
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&musb_dma_rx_ch[5],
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&musb_dma_rx_ch[6],
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&musb_dma_rx_ch[7]
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};
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static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
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&musb_dma_tx_ch[0],
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&musb_dma_tx_ch[1],
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&musb_dma_tx_ch[2],
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&musb_dma_tx_ch[3],
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&musb_dma_tx_ch[4],
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&musb_dma_tx_ch[5],
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&musb_dma_tx_ch[6],
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&musb_dma_tx_ch[7]
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};
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static struct ux500_musb_board_data musb_board_data = {
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.dma_rx_param_array = ux500_dma_rx_param_array,
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.dma_tx_param_array = ux500_dma_tx_param_array,
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.num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
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.num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
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.dma_filter = stedma40_filter,
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};
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static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);
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static struct musb_hdrc_config musb_hdrc_config = {
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.multipoint = true,
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.dyn_fifo = true,
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.num_eps = 16,
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.ram_bits = 16,
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};
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static struct musb_hdrc_platform_data musb_platform_data = {
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.mode = MUSB_OTG,
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.config = &musb_hdrc_config,
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.board_data = &musb_board_data,
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};
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static struct resource usb_resources[] = {
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[0] = {
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.name = "usb-mem",
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.name = "mc", /* hard-coded in musb */
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.flags = IORESOURCE_IRQ,
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},
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};
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struct platform_device ux500_musb_device = {
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.name = "musb-ux500",
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.id = 0,
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.dev = {
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.platform_data = &musb_platform_data,
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.dma_mask = &ux500_musb_dmamask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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},
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.num_resources = ARRAY_SIZE(usb_resources),
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.resource = usb_resources,
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};
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static inline void ux500_usb_dma_update_rx_ch_config(int *dev_type)
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{
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u32 idx;
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for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
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musb_dma_rx_ch[idx].dev_type = dev_type[idx];
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}
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static inline void ux500_usb_dma_update_tx_ch_config(int *dev_type)
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{
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u32 idx;
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for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
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musb_dma_tx_ch[idx].dev_type = dev_type[idx];
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}
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void ux500_add_usb(struct device *parent, resource_size_t base, int irq,
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int *dma_rx_cfg, int *dma_tx_cfg)
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{
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ux500_musb_device.resource[0].start = base;
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ux500_musb_device.resource[0].end = base + SZ_64K - 1;
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ux500_musb_device.resource[1].start = irq;
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ux500_musb_device.resource[1].end = irq;
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ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
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ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);
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ux500_musb_device.dev.parent = parent;
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platform_device_register(&ux500_musb_device);
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}
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