From d88b1397c674178e595319fab4a3cd434c915639 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Wed, 25 Apr 2018 11:45:03 +0300 Subject: dmaengine: ti: New directory for Texas Instruments DMA drivers Collect the Texas Instruments DMA drivers under drivers/dma/ti/ Signed-off-by: Peter Ujfalusi Signed-off-by: Vinod Koul --- drivers/dma/ti-dma-crossbar.c | 478 ------------------------------------------ 1 file changed, 478 deletions(-) delete mode 100644 drivers/dma/ti-dma-crossbar.c (limited to 'drivers/dma/ti-dma-crossbar.c') diff --git a/drivers/dma/ti-dma-crossbar.c b/drivers/dma/ti-dma-crossbar.c deleted file mode 100644 index 9272b173c746..000000000000 --- a/drivers/dma/ti-dma-crossbar.c +++ /dev/null @@ -1,478 +0,0 @@ -/* - * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com - * Author: Peter Ujfalusi - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ -#include -#include -#include -#include -#include -#include -#include -#include - -#define TI_XBAR_DRA7 0 -#define TI_XBAR_AM335X 1 -static const u32 ti_xbar_type[] = { - [TI_XBAR_DRA7] = TI_XBAR_DRA7, - [TI_XBAR_AM335X] = TI_XBAR_AM335X, -}; - -static const struct of_device_id ti_dma_xbar_match[] = { - { - .compatible = "ti,dra7-dma-crossbar", - .data = &ti_xbar_type[TI_XBAR_DRA7], - }, - { - .compatible = "ti,am335x-edma-crossbar", - .data = &ti_xbar_type[TI_XBAR_AM335X], - }, - {}, -}; - -/* Crossbar on AM335x/AM437x family */ -#define TI_AM335X_XBAR_LINES 64 - -struct ti_am335x_xbar_data { - void __iomem *iomem; - - struct dma_router dmarouter; - - u32 xbar_events; /* maximum number of events to select in xbar */ - u32 dma_requests; /* number of DMA requests on eDMA */ -}; - -struct ti_am335x_xbar_map { - u16 dma_line; - u8 mux_val; -}; - -static inline void ti_am335x_xbar_write(void __iomem *iomem, int event, u8 val) -{ - /* - * TPCC_EVT_MUX_60_63 register layout is different than the - * rest, in the sense, that event 63 is mapped to lowest byte - * and event 60 is mapped to highest, handle it separately. - */ - if (event >= 60 && event <= 63) - writeb_relaxed(val, iomem + (63 - event % 4)); - else - writeb_relaxed(val, iomem + event); -} - -static void ti_am335x_xbar_free(struct device *dev, void *route_data) -{ - struct ti_am335x_xbar_data *xbar = dev_get_drvdata(dev); - struct ti_am335x_xbar_map *map = route_data; - - dev_dbg(dev, "Unmapping XBAR event %u on channel %u\n", - map->mux_val, map->dma_line); - - ti_am335x_xbar_write(xbar->iomem, map->dma_line, 0); - kfree(map); -} - -static void *ti_am335x_xbar_route_allocate(struct of_phandle_args *dma_spec, - struct of_dma *ofdma) -{ - struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); - struct ti_am335x_xbar_data *xbar = platform_get_drvdata(pdev); - struct ti_am335x_xbar_map *map; - - if (dma_spec->args_count != 3) - return ERR_PTR(-EINVAL); - - if (dma_spec->args[2] >= xbar->xbar_events) { - dev_err(&pdev->dev, "Invalid XBAR event number: %d\n", - dma_spec->args[2]); - return ERR_PTR(-EINVAL); - } - - if (dma_spec->args[0] >= xbar->dma_requests) { - dev_err(&pdev->dev, "Invalid DMA request line number: %d\n", - dma_spec->args[0]); - return ERR_PTR(-EINVAL); - } - - /* The of_node_put() will be done in the core for the node */ - dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); - if (!dma_spec->np) { - dev_err(&pdev->dev, "Can't get DMA master\n"); - return ERR_PTR(-EINVAL); - } - - map = kzalloc(sizeof(*map), GFP_KERNEL); - if (!map) { - of_node_put(dma_spec->np); - return ERR_PTR(-ENOMEM); - } - - map->dma_line = (u16)dma_spec->args[0]; - map->mux_val = (u8)dma_spec->args[2]; - - dma_spec->args[2] = 0; - dma_spec->args_count = 2; - - dev_dbg(&pdev->dev, "Mapping XBAR event%u to DMA%u\n", - map->mux_val, map->dma_line); - - ti_am335x_xbar_write(xbar->iomem, map->dma_line, map->mux_val); - - return map; -} - -static const struct of_device_id ti_am335x_master_match[] = { - { .compatible = "ti,edma3-tpcc", }, - {}, -}; - -static int ti_am335x_xbar_probe(struct platform_device *pdev) -{ - struct device_node *node = pdev->dev.of_node; - const struct of_device_id *match; - struct device_node *dma_node; - struct ti_am335x_xbar_data *xbar; - struct resource *res; - void __iomem *iomem; - int i, ret; - - if (!node) - return -ENODEV; - - xbar = devm_kzalloc(&pdev->dev, sizeof(*xbar), GFP_KERNEL); - if (!xbar) - return -ENOMEM; - - dma_node = of_parse_phandle(node, "dma-masters", 0); - if (!dma_node) { - dev_err(&pdev->dev, "Can't get DMA master node\n"); - return -ENODEV; - } - - match = of_match_node(ti_am335x_master_match, dma_node); - if (!match) { - dev_err(&pdev->dev, "DMA master is not supported\n"); - of_node_put(dma_node); - return -EINVAL; - } - - if (of_property_read_u32(dma_node, "dma-requests", - &xbar->dma_requests)) { - dev_info(&pdev->dev, - "Missing XBAR output information, using %u.\n", - TI_AM335X_XBAR_LINES); - xbar->dma_requests = TI_AM335X_XBAR_LINES; - } - of_node_put(dma_node); - - if (of_property_read_u32(node, "dma-requests", &xbar->xbar_events)) { - dev_info(&pdev->dev, - "Missing XBAR input information, using %u.\n", - TI_AM335X_XBAR_LINES); - xbar->xbar_events = TI_AM335X_XBAR_LINES; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - iomem = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(iomem)) - return PTR_ERR(iomem); - - xbar->iomem = iomem; - - xbar->dmarouter.dev = &pdev->dev; - xbar->dmarouter.route_free = ti_am335x_xbar_free; - - platform_set_drvdata(pdev, xbar); - - /* Reset the crossbar */ - for (i = 0; i < xbar->dma_requests; i++) - ti_am335x_xbar_write(xbar->iomem, i, 0); - - ret = of_dma_router_register(node, ti_am335x_xbar_route_allocate, - &xbar->dmarouter); - - return ret; -} - -/* Crossbar on DRA7xx family */ -#define TI_DRA7_XBAR_OUTPUTS 127 -#define TI_DRA7_XBAR_INPUTS 256 - -struct ti_dra7_xbar_data { - void __iomem *iomem; - - struct dma_router dmarouter; - struct mutex mutex; - unsigned long *dma_inuse; - - u16 safe_val; /* Value to rest the crossbar lines */ - u32 xbar_requests; /* number of DMA requests connected to XBAR */ - u32 dma_requests; /* number of DMA requests forwarded to DMA */ - u32 dma_offset; -}; - -struct ti_dra7_xbar_map { - u16 xbar_in; - int xbar_out; -}; - -static inline void ti_dra7_xbar_write(void __iomem *iomem, int xbar, u16 val) -{ - writew_relaxed(val, iomem + (xbar * 2)); -} - -static void ti_dra7_xbar_free(struct device *dev, void *route_data) -{ - struct ti_dra7_xbar_data *xbar = dev_get_drvdata(dev); - struct ti_dra7_xbar_map *map = route_data; - - dev_dbg(dev, "Unmapping XBAR%u (was routed to %d)\n", - map->xbar_in, map->xbar_out); - - ti_dra7_xbar_write(xbar->iomem, map->xbar_out, xbar->safe_val); - mutex_lock(&xbar->mutex); - clear_bit(map->xbar_out, xbar->dma_inuse); - mutex_unlock(&xbar->mutex); - kfree(map); -} - -static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, - struct of_dma *ofdma) -{ - struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); - struct ti_dra7_xbar_data *xbar = platform_get_drvdata(pdev); - struct ti_dra7_xbar_map *map; - - if (dma_spec->args[0] >= xbar->xbar_requests) { - dev_err(&pdev->dev, "Invalid XBAR request number: %d\n", - dma_spec->args[0]); - return ERR_PTR(-EINVAL); - } - - /* The of_node_put() will be done in the core for the node */ - dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); - if (!dma_spec->np) { - dev_err(&pdev->dev, "Can't get DMA master\n"); - return ERR_PTR(-EINVAL); - } - - map = kzalloc(sizeof(*map), GFP_KERNEL); - if (!map) { - of_node_put(dma_spec->np); - return ERR_PTR(-ENOMEM); - } - - mutex_lock(&xbar->mutex); - map->xbar_out = find_first_zero_bit(xbar->dma_inuse, - xbar->dma_requests); - if (map->xbar_out == xbar->dma_requests) { - mutex_unlock(&xbar->mutex); - dev_err(&pdev->dev, "Run out of free DMA requests\n"); - kfree(map); - return ERR_PTR(-ENOMEM); - } - set_bit(map->xbar_out, xbar->dma_inuse); - mutex_unlock(&xbar->mutex); - - map->xbar_in = (u16)dma_spec->args[0]; - - dma_spec->args[0] = map->xbar_out + xbar->dma_offset; - - dev_dbg(&pdev->dev, "Mapping XBAR%u to DMA%d\n", - map->xbar_in, map->xbar_out); - - ti_dra7_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in); - - return map; -} - -#define TI_XBAR_EDMA_OFFSET 0 -#define TI_XBAR_SDMA_OFFSET 1 -static const u32 ti_dma_offset[] = { - [TI_XBAR_EDMA_OFFSET] = 0, - [TI_XBAR_SDMA_OFFSET] = 1, -}; - -static const struct of_device_id ti_dra7_master_match[] = { - { - .compatible = "ti,omap4430-sdma", - .data = &ti_dma_offset[TI_XBAR_SDMA_OFFSET], - }, - { - .compatible = "ti,edma3", - .data = &ti_dma_offset[TI_XBAR_EDMA_OFFSET], - }, - { - .compatible = "ti,edma3-tpcc", - .data = &ti_dma_offset[TI_XBAR_EDMA_OFFSET], - }, - {}, -}; - -static inline void ti_dra7_xbar_reserve(int offset, int len, unsigned long *p) -{ - for (; len > 0; len--) - set_bit(offset + (len - 1), p); -} - -static int ti_dra7_xbar_probe(struct platform_device *pdev) -{ - struct device_node *node = pdev->dev.of_node; - const struct of_device_id *match; - struct device_node *dma_node; - struct ti_dra7_xbar_data *xbar; - struct property *prop; - struct resource *res; - u32 safe_val; - int sz; - void __iomem *iomem; - int i, ret; - - if (!node) - return -ENODEV; - - xbar = devm_kzalloc(&pdev->dev, sizeof(*xbar), GFP_KERNEL); - if (!xbar) - return -ENOMEM; - - dma_node = of_parse_phandle(node, "dma-masters", 0); - if (!dma_node) { - dev_err(&pdev->dev, "Can't get DMA master node\n"); - return -ENODEV; - } - - match = of_match_node(ti_dra7_master_match, dma_node); - if (!match) { - dev_err(&pdev->dev, "DMA master is not supported\n"); - of_node_put(dma_node); - return -EINVAL; - } - - if (of_property_read_u32(dma_node, "dma-requests", - &xbar->dma_requests)) { - dev_info(&pdev->dev, - "Missing XBAR output information, using %u.\n", - TI_DRA7_XBAR_OUTPUTS); - xbar->dma_requests = TI_DRA7_XBAR_OUTPUTS; - } - of_node_put(dma_node); - - xbar->dma_inuse = devm_kcalloc(&pdev->dev, - BITS_TO_LONGS(xbar->dma_requests), - sizeof(unsigned long), GFP_KERNEL); - if (!xbar->dma_inuse) - return -ENOMEM; - - if (of_property_read_u32(node, "dma-requests", &xbar->xbar_requests)) { - dev_info(&pdev->dev, - "Missing XBAR input information, using %u.\n", - TI_DRA7_XBAR_INPUTS); - xbar->xbar_requests = TI_DRA7_XBAR_INPUTS; - } - - if (!of_property_read_u32(node, "ti,dma-safe-map", &safe_val)) - xbar->safe_val = (u16)safe_val; - - - prop = of_find_property(node, "ti,reserved-dma-request-ranges", &sz); - if (prop) { - const char pname[] = "ti,reserved-dma-request-ranges"; - u32 (*rsv_events)[2]; - size_t nelm = sz / sizeof(*rsv_events); - int i; - - if (!nelm) - return -EINVAL; - - rsv_events = kcalloc(nelm, sizeof(*rsv_events), GFP_KERNEL); - if (!rsv_events) - return -ENOMEM; - - ret = of_property_read_u32_array(node, pname, (u32 *)rsv_events, - nelm * 2); - if (ret) - return ret; - - for (i = 0; i < nelm; i++) { - ti_dra7_xbar_reserve(rsv_events[i][0], rsv_events[i][1], - xbar->dma_inuse); - } - kfree(rsv_events); - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - iomem = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(iomem)) - return PTR_ERR(iomem); - - xbar->iomem = iomem; - - xbar->dmarouter.dev = &pdev->dev; - xbar->dmarouter.route_free = ti_dra7_xbar_free; - xbar->dma_offset = *(u32 *)match->data; - - mutex_init(&xbar->mutex); - platform_set_drvdata(pdev, xbar); - - /* Reset the crossbar */ - for (i = 0; i < xbar->dma_requests; i++) { - if (!test_bit(i, xbar->dma_inuse)) - ti_dra7_xbar_write(xbar->iomem, i, xbar->safe_val); - } - - ret = of_dma_router_register(node, ti_dra7_xbar_route_allocate, - &xbar->dmarouter); - if (ret) { - /* Restore the defaults for the crossbar */ - for (i = 0; i < xbar->dma_requests; i++) { - if (!test_bit(i, xbar->dma_inuse)) - ti_dra7_xbar_write(xbar->iomem, i, i); - } - } - - return ret; -} - -static int ti_dma_xbar_probe(struct platform_device *pdev) -{ - const struct of_device_id *match; - int ret; - - match = of_match_node(ti_dma_xbar_match, pdev->dev.of_node); - if (unlikely(!match)) - return -EINVAL; - - switch (*(u32 *)match->data) { - case TI_XBAR_DRA7: - ret = ti_dra7_xbar_probe(pdev); - break; - case TI_XBAR_AM335X: - ret = ti_am335x_xbar_probe(pdev); - break; - default: - dev_err(&pdev->dev, "Unsupported crossbar\n"); - ret = -ENODEV; - break; - } - - return ret; -} - -static struct platform_driver ti_dma_xbar_driver = { - .driver = { - .name = "ti-dma-crossbar", - .of_match_table = of_match_ptr(ti_dma_xbar_match), - }, - .probe = ti_dma_xbar_probe, -}; - -static int omap_dmaxbar_init(void) -{ - return platform_driver_register(&ti_dma_xbar_driver); -} -arch_initcall(omap_dmaxbar_init); -- cgit v1.2.3